Suzuki GZ250 Maintenance and Repairs
HTML-код
- Опубликовано: 24 янв 2025
- In today's video I take apart my GZ250 to do some maintenance and inspections. I inspect the valves, the clutch and carburetor. This is the disassembly part of it. Part 2 and the final will be reassembly.
Thank you so much for all these videos!! I have a 2003 marauder version of the 250, it's such a great little bike and these are helping me so much!!
Late reply, but, I agree, this bike has been around in our family for awhile. I learned how to ride on it and so did my son. We have now moved up to 400s. We are currently selling our 250 because we have no room in our stable for this pony.
picking up my GZ250 tomorrow, my first motorcycle!! it has about 10k miles on it so ill probably be looking to do some maintenance as well! this video seems like a good place to start! fortunately these bikes dont seem to have a whole lot going on, so i would believe most of the work to be fairly straightforward. as a car guy, i know that 10 minute jobs often turn into multi-hour jobs, but these little bikes just look so dang simple!
Congrats on the new bike. I got mine with 2k on it and since it sat for 10 years it needed a lot of TLC. The first thing i found when i starred riding was the clear fuel line was cracked and started leaking. Definatly replace that. I had to change my spark plug every oil change for some reason. 3-5k miles. The OEM is very cheap, under 5.00. You are correct, these bikes are so simple and easy to work on. I too was a long term car guy and i found the bikes to be the same as a car except shaped diffeeently. And of course the 250 has no water. If your experienced with cars you will do great with yours. Great first bike, my son learned to ride on it too. If you keep it around 50mph you could get 60-70mpg. It has peppy first gear but after that it shows its CC rating lol. I now ride a 2019 Kawasaki Vulcan LT 900. I had to step up. Have a great time and ride safe my two wheeled brother.
@@cobravids Wow thanks for a quick reply! the bike im getting has been ridden every season for at least the last couple of years, so it should be in fairly decent shape. i just like to freshen things up on any vehicle i buy just so i know exactly when things have been fixed/replaced and that way i know when it needs to be done next, as opposed to guessing or relying on the previous owner who may or may not remember when things were taken care of last. i will definitely keep an eye out on the clear fuel line. i will also probably change the spark plug and air filter. i personally know nothing about carburetors however, so they have always seemed a bit daunting to me. but i will be careful and follow as many instructional videos as i can for everything i decide to work on with this bike! i dont plan on taking it on the highway anytime soon either. im not a fan of highways in cars! Thank you for the kind words! im so excited to start riding!
@@cobravidsmy situation is very similar, the one i’m about to get has 3k miles but has sat in a garage for many years. if you see this, would you mind giving me a quick run down on the most important things to fix?
@missing in action Yes sir. These are the things I would do immediately.
Air filter
Oil/filter change, use the k&n
Compression test
Brake fluid change, front only, rear is cable.
Spark plug
Brake pad inspections.
Fork oil.
Fuel tank flush.
Fuel line replacement.
Doing all this will bring the bike back to safe conditions. Really.check out the fork seals. If the outer "dust cover" seal looks crack replace them. If you push the forks down and they are moist when they come back up you will need to do an overhaul. I'm sure there are more I will thi nk of later, if so I will return to add them.
@@cobravids i truly appreciate you getting back to me so quick, i feel like you just gave me cheat codes lol. if you have any more advice that comes to mind, i’ll be all ears, i get the bike on the 17th. once again, thank you!
Thank you so much, I have a 2006 GZ250 Marauder, these are helping me a lot, ride safe!
Glad to help thanks for watching.
Good video. Stands the test of time
Thank you, can't wait to do the same to mine ❤️🙏❤️
I sold mine, I regret it. I loved that bike, but I found myself with 4 bikes and never rode the GZ. I wish I never did sell it because it was such a tank and really was a fun bike. Great for going to the store or commute to work. Mine got 60-70mpg. Enjoy yours and be safe out there. Thanks for stopping by. Check out our other GZ videos too.
@@cobravids thank you, never thought I would get a reply :)
I've been working as a software developer for 15 years and I'm a bit tired and thinking of going back to motorcycles as it was something I loved 20 years ago.
First step, make a bobber out of a GZ250. I'm a bit scared of cleaning the engine like you did, but got more courage after seeing you doing it 😉
Do you know how to remove the ignition barrel? I need help
Here is a link to the service manual for your bike. I no longer own mine. It probably has something to do with removing the "dash" area and flipping it over. It's hard for me to remember the setup. I hope this helps.
www.manualslib.com/manual/1054006/Suzuki-Gz250.html
Great work! Thanks for the tips.
All that know how and you still have a squeaky door. Lol. Just bought a 2009 gz250 and appreciate the time you took to help us others out. I have oil dripping from my exhaust where it goes into the engine. Is that just the gasket? And if so can I use gasket sealer? Also blinkers only works sometimes? Don't know much about these things. Just learned to ride. Thanx again
Lol, my dad always gave me crap about my squeaky door. I keep my exterior doors squeaky because if someone was to open them at night my dogs would go nuts and I would know that someone was coming through. LOL, I laughed my rear off when I read that. Thanks for watching
Oh, as for the oil dripping out of the exhaust. You may be having blowby, oil coming past the piston and blowing out the exhaust. The blinkers not working sometimes is more than likely the flasher. I would remove it and clean the contacts and try it out. I first learned to ride on this bike as well. Great starter bike. Now I have a 2019 Vulcan LT 900 and my newest 2019 Z400.
Hi, I'm wondering what connector at 22:23 was for the ignition key, and would i be able to access it without disassembly ?! I'm trying to buy one this week but it comes with no key so I'm trying to see if I come with new ignition if I can get it running on the spot ?! Hoping for an answer, Thanks !!
Im sorry i cannot answer that for you. I no longer own my 250. However if you have the opportunity to buy a low mileage one for a decent price take it. They are very simple and almost bullet proof.
@@cobravids Ye Im planning on picking one up 08 model for $1200 this Monday. It got only 2100 miles but they don't have a key for it. So I cant even check if it works :P. Do you think I still should go for it, change the ignition, and wish for the best?
@@EKzelll 2100 miles? I got mine at 2,000 and it was an 01. Means it sat in a garage for a long time. I would say go for it. Its a good gamble especially since the only thing that really goes out on these is the head gasket which is very simple to do. No water. You "could" take a drill with 1/4 drill bit and drill out the lock tumbler and turn the key over like that. OR, take the VIN/SERIAL number and go to a susuki dealer and see if they can cut you a key. I know my kawasakis came with a key code for this such thing. Once you do get it running then you can worry about spending the money for new lock tumbler. The scary thing is buying from someone you dont know is they may be hiding the key and the fact its blown. So your right, it is a gamble.
Great bike, at 50mph you will get 50-70mpg. After i got mine the clear fuel line cracked and was leaking. This is due to it sitting around for 10 years. You would need to change the spark plug every other oil change. At least thats what i had to do. Let me know if you buy it and what happens. Is this your first bike?
Great video mate, holding out for part 2!
Thank you sir for the good comment. It will be awhile for part two. I decided to wait awhile to finish it up. With all this silly Corona craziness it will put that project on hold. Other projects are coming up. I'm installing a new power station for my kawasaki. Stay tuned
@@cobravids I have the same valve cover leak that your's has! Have you had a look at the valve clearance yet? Looks like you need one of the Suzuki tools to get at the rocker adjustment screw :s
@@tonyhowat9862 I was able to find feeler gauges and get them adjusted to book specs. It took some work but got them adjusted. Do you have a manual? I can send you a link to a good service manual free online.
@@cobravids Yes I've got the e manual, thanks for the offer though :) did you manage to adjust it with a normal socket set?
@@tonyhowat9862 I used very small wrenches. It took me two three times each side to get them right.
What if one of the head bolt is leaking?
@gnz265 if your getting air coming out a head bolt then my guess would be a head gasket. These are pretty easy to do. No water to worry about.
Read the manual before removing the valve cover. There is 2 screws which should not be removed (valve rocker) because there is two washer wave on these axe. Obviously here, they fell into the cylinder head!
No washers fell out. I'm going to assume they already fell out in the past. Good tips, thanks
Hello sir, my gz250 is not starting... Checked the battery and it's good..motorbike rolling but not starting..3 days ago it did start but while starting it was missing a lot so I had to hold the rev to high to let it start and it was emitting black smoke so I thought maybe there is gas in the engine oil so I changed the engine oil... Bike still rolls after pressing clutch and start key but cannot start.. see if you can help
I even pulled the bike from another bike and drop the 2nd gear... Doing this the bike seems to start but doesn't start like engine rolling but not fast enough... I did this around 20km/hr speed.. I pulled the bike like this for 30meters and the bike was barely starting
It was just a lose spark plug... Fixed it still didn't start.. checked the resistance and it was over 18000ohm... So bought a new spark plug dr8ea and it ran
Sorry I didnt a chance to respond. But I was going to say check the plug. I was getting very hard starts and the spark plug was wobbly in the hole. I had to snug up the plug a few times. Keep an eye on that because you dont want the compression to blow the plug out and take the threads with it. Glad to hear its running again.
Any thoughts on replacing the choke cable? Ty
This should be an easy job. Pretty straight forward. As with any bike the only issue i see is fiddling with the cables inside the box they go into up on the handle bars. Is your not working or sticky? You can try putting some lubrication down one side of the cable and just working it in and out. This could be done with the cable mostly installed. Just remove it from the habdlebar mount and then hold it uoright and dribvle like break free or other penetrating lubricant and work the cable in and out to get it down. Gravity helps here. Hope this helps.
@@cobravids can I possibly show you a pic of the problem? TIA
@@fairybear4185 yes, you cam send it to cobravids@yahoo.com
Sounds good.Thanks
This was amazing!
Thank you for watching and commenting. This bike was special to me. I learned how to ride on it. So I tried to learn how to take care of it. This bike was passed on to another guy wanting to learn how to ride. This was a fun video to do. Stay safe my friend.
@@cobravids Thanks for these videos. Been watching your other ones. Just bought one of these a 99 GZ250 for my first bike. Great little machines. Stay safe as well.
HELP 2 things, most importantly, same as some others, the bike turns over fine (replaced battery) I got it running after pulling the carb and cleaning it out, now it wont fire, it'll turn over but wont catch/fire now. The plug is only a year old and I rebuilt the carb completely last year. Any ideas?? Second, what tires are you running. I had a heck of a time finding tires for mine. All I could read was Dunlap...
First off tires. I used Dunlop too. Jpcycles is a decent place for parts. They have online chat that is helpful finding parts. You can use tubeless tires on there as well as long as you have the right size and good tubes.
The fire, just in case, remember to prime the carb first. This got me one of the times I had my carbs off and until I prime for some reason it wouldnt fire. Next I would make sure that you have the choke screwed into carb correctly a d fully. This could leak and not allow proper vacuum to bring fuel down. You could spray starting or carb cleaner into the airbox to see if it catches and fires. If not I would remove the spark plug wire and stick a screw driver in the plug and hold it to a good ground and crank the engine. If you get a nice spark then you know that's good. Being that you had the carb apart I would stick with inspecting fuel flow to start. Try those ideas then get back go us. I'll help you out until you get her running.
Also, you may want to remove the bowl again to see if there is fuel in there if you dont get it running. Sometimes when the carb dries out a bad float needle valve will stick to the seal and not open up.
Thanks for the video man!! I will do the same for my bike 🔥
You should of have left the rocker arm shafts in the valve cover, then you can just slide the whole cover forward and down and out.
Your correct.
All the speed that a rider can use legally ?
Don't recall what I said in this video but knowing me it was smart-ass comment. Lol.
Great video, Have you ever replaced the red on and off switch on the handle bars? I believe my switch either needs cleaned or replaced. I need to turn the switch on and off when starting my bike to allow it to start.
I have not done work to that switch. However I have worked on a headlamp hi low beam switch on a Kawasaki, It was sealed and could not be cleaned. I would look at 2wheel pro site. They have a large list of OEM parts that you might find a new/old stock part.
@@cobravids awesome thx for the info.
Much appreciated!!!!
William
Could you please make a video on how to adjust the clutch, thanks.
That's a great idea. I will get one done soon. Thank you for the suggestion. I have to change some bulbs on mine so I will do a video with that and the clutches this weekend.
Mine idles to high and I can't get it to go down in rpms...when clutch is engaged it's just gets louder
I know it sounds silly, have you checked the idle screws? Are they actually moving the throttle in and out? Check the choke valves, you may have a leak/plug that is causing it to act like the choke is on. Some chokes choke air and some choke fuel, I cant rememer which this bike does. I would also look into the float, if the float is stuck open it could be allowing too much fuel to flow into throttle body. There are several different things that could cause this, mainly it is getting too much fuel into the system which causes it to act as if you were throttling it up. Take a close look at this and get back to us. The carb is easy to remove and the needle valve is cheap enough to swap out. Do a good cleaning while your in there.
I cleaned out my carburetor and she sounds back to normal but now she's acting up I was told I might need a head gasket replacement
@@Chevy-ke5kn Compression test will tell you everything. Theres a great PDF service manual I used many times for that bike. It will tell you the specs on it. I can send you a link if needed. I have heard of some strange issues with head gaskets on these. I think it would be a simple bike to do. Have you adjusted the valves on it yet?
Hey not sure how the bike is doing currently but could you link where you got the sidebags from? Looking for some storage options from the bike
My son is riding it now. We actually found that the spark plug was backing out causing major compression issue. A link to those boxes is www.ebay.com/itm/2X-Black-Hard-Saddle-Bags-Trunk-Side-Luggage-Motorcycle-Cruiser-w-Lights-Mount/223037752826 I thought they were gonna be cheap but after a tear and half in Arizona sun they have held up great! They are universal so you have to be a little creative with Home Depot brackets. Worth it though.
Cobra Vids awesome wow thank you so much for the speedy reply
@@jeremyarana4259 No prob. At the end of vacation so I'm just sitting around watching youtube drinking a cold one. If you want to see anything on the bike I still have it and would enjoy doing a video for ya.
Thank you for creating this video, the one that I have is experiencing an issue. When it hits 20mph it does go above this number. What do you think is wrong?
It could be a couple things. I would start at the easiest part. Check the spark plug, mine kept backing out. Check the gap setting. While you have that out check compression. One thing that these have issues with is carburetor. Check jets to make sure they are open and not clogged. Use a small wire, guitar strings work great, to clear them out. Make sure all the o rings and other rubber parts are in good shape. In another video I did I showed how to adjust the air fuel mixture screw. Remove the petcock and disassemble to make sure it is not clogged up. Theres a screen inside the tank that can get plugged. Also make sure the small hose going from petcock to the carburetor has no holes or cracks. If I think of anything else I will add it. I would start there and work inward. Adjusting the valves could help tune it in too. Let me know what you find out.
@@cobravids Thanks a million buddy,I truly appreciate your knowledge. Have a GOD bless day.
@@renostubbs8504 No problem sir. Feel free to ask anything you need help with. If I dont know the answer I will find out. I recently sold mine to a young man wanting to learn to ride.
@@cobravids Thank you,GOD BLESS YOU
Hello sir... the left exhaust head came off completely... but the right one is still attached... bike is cranking but not starting... is it the low compression... I read somewhere that the bikes can start with no exhaust but this one not starting just cranking... pls help
The first thing I would suggest is determining why the exhaust came off. Did it blow off or loosen up. The bike should run fine without the exhaust as they are pretty much free flowing. The first thing to test would be compression. That is everything on these bikes. It is difficult to get a hose on the head, you will have to remove the tank for ease of access. Check the compression and come back with the results. You should see 90 - 120. That should be a range of operation. Some will run on a little less but that's where mine ran. I can send you the pdf service manual if you connect up with me on my email cobravids@yahoo.com
@@cobravids sir it was running fine till today and when the left exhaust came off it didn't start at all... it was loose and I didn't check... it was leaking gasses but was running fine until it came off completely..
If I put back the exhaust with no exhaust gasket will it run?
@@TheNitin661 it should. The exhaust o rings are very difficult to remove. When mine had a leak I thought it was missing because of how far it sits in the head. But yes it should run but noisy if gasket is missing. Test for spark, fuel compression.
@@TheNitin661 Compression is where I would go. There are some 2 stroke engines that require the resistance of exhaust to run, but this one is not. Once you find out compression everything should sink in. If you cannot check compression you can check for fuel and spark. Just remove the spark up wire and hold it close to a ground while cranking. May have to use a screwdriver shoved in there for contact. Then you can remove the hose going from petcock to carb. Blow through the nipple of the carb to check to see if the float opens. Get back to us when you have tested these. If no spark or no fuel pouring out of that hose or plugged needle valve that's your prob.
where is that vent going to? I took my tank off and the vent tube was just hanging there
It has been a long time since I have worked on this bike. There are some bikes with vents that do hang. But the most common will go back to the engine side of the filter. If it's a bowl vent you might find it going to the evap/emissions valve. On my vulcan I had a vent going into the air filters.
@@cobravids I think it's a vacuum tube that goes to the carb to work the petcock, I found a broke nipple on the carb I think it was supposed to go on. could explain why it's been running rough.
@@fordman7479 It would definitely cause a vacuum leak. More oddly it's running at all. Without vacuum to that petcock you shouldnt have fuel coming in. I would suggest rebuilding it just to knock that issue out. Be careful, ours went out and filled the crankcase with fuel.
Hello cobra vids I have a question(well a few where does the little black tube that on the right side of the carb go to also why I’m asking is that I have gz250 ‘05 and it’s only running on choke when ever I take off the choke or slowly throttle it it immediately dies if I throttle it aggressively all the way it just BRAAPPPP’S and has a possibility of dieing when I do it I have a a theory is it possible that I put the little piece in the middle of the carb( the one that’s in goes in the middle with a long pin sorry don’t really know the terminology ) I would love a quick response the suspense is killing and I would like to avoid going to the mechanic and then charging 200$ for a job the could cost 20$-50$ if anything
Hang in there, I just recorded a short video I am going to post on my channel describing all the tubes and doing my best to show you where they go. I got close ups so you can see more of it, AND I gave you a few other things to look at. I also would suggest doing a compression check just to rule that out. Expect the post in about a half hour.
22:23 you're welcome
hello! i just bought a 2008 gz250 almost a month ago and i notice in the cold (about 50-60 degrees) my gz250 has some struggles keeping its idle. my idle screw is very high leaving the bike sounding like its being revved about halfway which is terrible. my bike has 3400 miles and ive been told i need to adjust my carb. so far ive loved all these videos since there isnt much information i can find on this bike besides the owners manual. I would like to know where do you get replacement parts since i have only found universal parts for it, also where can i get those awesome saddle bags. Thank you! keep these up, very helpful!
Thank you for commenting. I love my little 250. I ride it to work a lot. I do notice in the cold mine does some odd things like not having power and cant get up over 60. When I think of struggling idle I would think you would need to do a serious carb cleaning. If you have clogging jets i would think the cold would make it worst. I have a video that I'm about to post that covers the carb cleaning. I didnt find much on my 250 either which made me decide to post everything i did to it. Also have you replaced the air filter? And I know it sounds odd with only 3500 miles but being a 2008 I bet that spark plug is original, imagine all these years it sat with that plug. I would replace it, the filter, if not already, and do a good carb clean. The jets are removable with a flat head and best cleaned out with tiny drill bits or guitar strings. The tiniest blockage can cause havoc. As for my saddle "boxes" I got those from ebay. 50.00. And they were incredibly hard to install. They are not a factory fit and I had to do a lot of work. I should have posted that but since it wasnt factory I decided not to. And for parts, I use 2wheelpro.com i think it's called. OEM. Let me know if you have any more questions, I enjoy helping others. My 250 has 11,000 miles now. It has been a reliable bike even considering the few things that has gone on with it. Also, have you tried lowering the idle screw and add about 1/4 choke? Sometimes that will even things out.
Bro came prepared
I know it's gonna sound bad, I've had my GZ250 in storage over 10 years now. I'm pretty sure ima have to do a complete overhaul of the entire bike. Where would you recommend starting out and how can I get her to run super smooth? Thanks man, I really appreciate your help.
That dont sound bad, hey listen, when I bought my bike it had onliy 2,000 miles on it. It sat in someones garage for 17 years. All I had to do was replace the fuel line and clean the carbs. Dont panic just yet, these GZ250's are pretty indistructable. What I would do is just drain any old fuel out, take a flashlight and look inside take to make sure that it is not rusty. That will cause you all kinds of problems if it is. Then check the fuel line for cracks. While you have the fuel line off checking it refill the tank with fresh fuel and take the small vacuum line off the carb and suck on it to see if fuel comes out of the fuel line. That will tell you the petcock is working. Then go through and remove every single conection you can find and clean with either electronics cleaner or a fine piece of sand paper. Mainly the ground and battery connections. Remove the spark plug and replace it, they are only a couple bucks and will help you out. While the spark plug is out put a little Marvel Mystery oil in the cylinder while you do the rest. Make sure the battery is strong and fully charged. A good battery should sit without a load at about 12.8-13. Check the oil to make sure it is clean enough. Dont change it just yet if it looks decent, oil was in the ground for millions of years so a few years in the bike wont hurt much unless it gets moisture or other contaminates in it. I would change it once you get it running, then worry about tuning it in once you have fesh oil. Then I would give it a start, You may have to play with the air fuel mixture and/or idle controls to fine tune our engine. If I think of anthing else I will reply again. I have a like to a PDF service manuel if your interested in that too. Most people already have that one. Come back and let me know how it goes.
Hey thanks so much for this comment, checking out several of these lil guys at a police auction in April, all 6000 miles definitely been sitting for years. I have no experience with motorcycles and this will help! Thanks again and I will probably be on this video again soon, haha!
@@danielmacbride525 I worked on just about every thing on this bike. Let me know if you have any questions. If you buy one the first thing you should do is drain gas and do a good teardown cleaning of the carb. They tend to plug up with varnish fuel. I had to do this on mine. Sat 15 years ran a couple times and only had 2,000 on it. The jets were crusty. I used a guitar string to clear them out. Good luck and yes these are great little first time bikes. I regret selling mine. I just had no room to store her with all my new additions. Riding gets addictive, better then crack. Lol
Hello sir what type of saddle bag are you using i have a 2007 suzuki GZ-250 I'd like to get a saddle bag for my bike tho.
These were from ebay. They took some creative mounting as they were so called universal. But after a little while I was able to get them pretty solid. I'll look for the link and get back to you.
Here is the link I bought from. www.ebay.com/itm/2X-Black-Hard-Saddle-Bags-Trunk-Side-Luggage-Motorcycle-Cruiser-w-Lights-Mount/223037752826?pageci=2186bc3e-e2bd-42ad-ac1d-711955598677&epid=3021027125
Change handle bar on go Suzuki 250
Just sold her. It was a sad day. We will miss our GZ250
Hello sir, how can I keep my indicators always lit..
It used to be lit all the time.
Thank you
Are you referring to the front yellow lights? The fronts remain Lit and also flash for turn signals. The rear ones do not stay lit, they are for the turn signals only. Is that what you are referring to? Let me know, I am glad to assist.
@@cobravids yes the front ones... Actually I had a led installed and it was taking current from one of the wires.. I took out that led and joined that circuit back and since then my front indicators are not always lit.. it used to be lit.. but it's blinking when I want it
@@cobravids and also my tail light works when I press brakes... Also this used to be on all the time
@@nitinnautiyal4198 the constant indicator light is on a separate circuit then the turn signals, but not necessarily the same fuse. Just to make sure have you checked all the fuses? And the running lights probably run on the same circuit as your taillight. Is your tail light on when key is? Test your brake light to make sure that's coming in as well. Both foot brake and hand brake. Just for kicks remove the bulbs and see is they look fried or dirty contact on that filament. Let me know the results of your checks.
@@cobravids I didn't check all the fuses. The taillight is off when the key is on but it does turn on when I apply brakes .
One thing about these bikes the parts are not priced high
You are correct. I was pleased with that. It was a very easy first bike to learn with.
@@cobravids they will last forever built good and strong. I've got over 100k on mine I bought it with 68k on it the odometer quit at 99,999 and that was over a year ago
@@jonathanesters8030 WOW! by the time my son learned I had 15k on ours. I bought it a few years back with 2,000. It sat in someone's garage for many years. All i did to it is on my channel. I made a few errors which cost me money, but I was learning. Like using a master link chain, boy that was a mistake. The link popped off and damaged the engine cover. I used a crimp style chain and never had an issue after. I sold it to a kid wanting to learn for $500.00