Building My CR250 Engine!
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- Опубликовано: 6 сен 2024
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★CR250 Parts List www.prymemx.co...
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Rubber Gloves www.prymemx.co...
Finally got around to building my CR250 engine! Enjoy!
-Cameron
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When checking ring gap use the piston to center up the ring in the cylinder. Great video
Hydro dipped‼️ my CR250 check it out ruclips.net/video/HPe1JQ4H6yI/видео.html
Thanks for advice
Was about to post the same thing. Oil the cylinder and piston so as not to scratch anything and let the piston perfectly set the ring depth.
Allahumma shalli 'alaa sayyidinaa muhammad wa'alaa aali sayyidinaa muhammad wasallim tasliima😁😊
Yok Tobat Kawan Dan Jangan Lupa Sholat Dan Sholawat😊😁😊😊😊😊😊
I love how everybody is like : When is the crf250r being rebuilt? How much longer till the CR is done? Everyone needs to chill. Your primary goal right now is getting better! Don’t let ANYTHING get in the way of that! #camstrong
No F...this is a real CR
@@rickfeith6372 he is talking about the Crf250r he said he was going to rebuild for his friend in a previous video before he was diagnosed
Nice kawi
When checking the ring gap i like to use the piston to push the rings straight. Awesome video as allways!
Praying for you man! Nobody deserves to kick cancers ass as much as you do!!
Hope your treatment gos well ❤️❤️❤️❤️❤️❤️
I’ve never been the type to really watch or get into someone’s RUclips channel, I will admit I always find myself watching your videos more than anyone’s Cam! I’ve had to rebuild a few motors myself and when I’m stuck I always look at your channel bc I know you have had to deal with it most of the time! Thanks for making the best tutorials! I hope and pray your treatments go well, for as much as I watch your videos I had no idea you were going through any of this! You can do it buddy! #CamStrong
Good job, congratulations 👌.
Allahumma shalli 'alaa sayyidinaa muhammad wa'alaa aali sayyidinaa muhammad wasallim tasliima😁😊
Yok Tobat Kawan Dan Jangan Lupa Sholat Dan Sholawat😊😁😊
Can’t wait to see this build complete!!!
When you're doing ring end gap use the top of the piston to press the ring down into the cylinder just a quick way to make sure it's seated evenly.
I prefer forged Wiseco pistons, but otherwise, 20 mins for top-end assembly is pretty good..
If by some accident you do drop a nut or circlip into the crankcase, you can allways fish it out with a magnet.
The head in the thumb nail looks good on this motor
I just did my KX 250 F. The expansion ring , and rails are very delicate and hard to keep clocking oriented right. My shop manual suggests circlip ends not to be in piston cutout. You can use piston to square rings for end gap. I’m now gathering up all my parts to totally restore my 2001YZ 426. Glad to see you back working , fantastic results as usual!
When you popped that second ring into the bore, you could see all the lube getting squeezed out, sooo satisfying lol. Keep sending it bro! 11:49
Sir, Cameron, I have a 1986 CR250R, Which pertains too the Bottom end of your assembly videos. I really like what you've done to the CR. Alike you I've had a battle with Cancer, 6 Cycles of Chemo and 7 treatments of Radiation. Countless hours of treatment, I went through 2 months being nauseous and lost 80Lbs. I received the CR as a gift for completing therapy. Basically what I'm saying here is I wish you well with your Battle with Cancer. Never give up biking, and cranking. Drip, Drip, Drip, Drip,. Have a great season CN a friend CZ................................................
Vertex is always a great choice!
Hey cam I know this video is a couple years old at this point but thank you for making it. I put my 2007 CR250 back together with a new top end today and your video helped me out a lot
You are a natural kid, great job... You are in your element, keep up the excellent job.
hope you are feeling better. just wanted to comment on the circlip orientation... gap should always be facing at 12:00 or at 6:00, not where the gap in the piston is. its very prone to back out if it is not straight up or down.
Keep your head up and shoulders square my dude! Love from Zimbabwe🇿🇼
Awesome assembly, i really enjoy your videos man. Very well put together
Thanks Shaun!
That was FANtastic.
Thanks for taking about the head. I NEEDED that.
Need to drill holes in the piston to cool the exhaust port bridge. Bridge gets to hot will expand into the piston. Holes are for cooling nothing to do with piston. If there's no bridge then no need for holes. My 2000 cr250 had no bridge. I seen one in your build.
Agreed 100%, need the holes. Easy to do.
Drilling holes lets the bridge get oil....always did it one my Husky.
@@tomnekuda925
He decked this bike out pretty good. Lots of hard work and now it's just going to blow up on him.
Probably not as the bridge still gets some lube but might wear a line in the piston....maybe not on water-cooled but usually happened on air-cooled.
Use the piston itself to fix the piston rings into the cylinder at the correct height for measuring the tolerance correctly. And the rings must be pushed a bit ( 1 cm from the cylinder top) when you make the measurement bc next to the upper side, the cylinder is not reached by the rings when the engine is working and it will have kinda brand new dimensions, so push rings into the working spots to have a correct measurement. For the rest really nice video! Very well done and nice assembly!
Excellent video, Thanks for addressing the lube holes drilled in piston on exhaust side theory(cast vs forged).
man i hope the rest of your treatment goes well. i am happy you can put out videos even with the stuff inside of you. prayers to you brother!!!
‘Now i just have to locate my nuts, for the cylinder that is’ 🤣🤣
HJZ75driver that got me aswell xd
Love you man, keep fighting. Love from Australia!
Using the piston to push the ring down in the bore is a great way to be sure its level and straight.
Hope you get well soon Cam. Love watching your videos. All the best from the UK
Great vids. One thing I noticed, you mentioned that when you install the circlips into the pistons, you prefer to line up the circlip gaps with the gap on the piston. Most manufacturers have a tolerance and diagram displaying a minimum distance that the circlip gap should be from the gap on the piston. For instance, my Yamaha indicates a distance of atleast 3mm for my 2017 YZ250F. Its good preference to keep the circlip gap as far away from the gap on the piston.
The cir-clips for the wrist pin should not have a end in the open spot! It's installed wrong its unlikely it will come out , but its better to have it installed the correct way. the second one you installed looked lined nicely.
Wow this was the first vid I saw from you, great work. I hope for the best for you. I kind of know how it is since my mom got cancer 2 years ago but is now free from it. Fortunately I live in Sweden so treatment doesn't bankrupt you. You've earned yourself a new subscriber!
Awesome vid! Just a tip...when you want to measure the end gap, use the piston skirt to push the ring down the bore a little way. It helps get the ring level quickly and easily and you get more reliable measurements.
“Now we just gotta locate my nuts for the cylinder that is”. 😂. Insanely good job man.
I know this is a rather bit later but there is an easier way to install piston ring into the cylinder and is as follows. Hold the piston ring with the gap outwards from the cylinder while slipping the ring into the cylinder then rotate the ring towards you while in the cylinder until it has completely seated in the cylinder then use the piston to square up the ring from below now, measure the ring end gap if it is tolerances then rotate the back out the same way it had been done to remove the ring and the install this ring on to the piston's bottom ring grove. Do the same with the other ring but instead install this second ring in the piston's top ring grove. You may use an old piston, instead of the new piston if you have already installed this new piston on to the small end of the connecting rod, to square up these piston rings only after it has been well cleaned. This method has been learned for and as a time saving, the reason is during pit operations while getting ready to get back into the race with your bike, where time expenses count greatly during long races where you are allowed to make quick repairs on your bikes. Not I'm talking about jetting operations, this for those times the bike had breath some dirty air and caused poor running afterward after all is said and done, racing is an outdoor sport and it is where the dirt is, and all have fallen at some time or another. Ten years of various motorcycle racing and as a pit crew member too.
Hello Cameron. You don't thread the stud into the housing. You screw it into the housing. Threading is something done in a machining process. Threading: A Process used to describe the forming of a thread. Cutting Material or Even Rolling into shape. On another note: Enjoyed watching you put this machine together. Sure would be nice to have the cash to order all the parts and put together a beautiful machine like this!
keep going bruhh, keep strong,
from Indonesia 🇮🇩
Sama kita
Nyimak
Hi Cameron, Glad to your up and moving about more. Still praying for you and the family too. I do have a suggestion for the studs in the cases or barrels. Per tax makes a copper based anti-seize compound. This is way better to prevent Galvanic corrosion for the steel studs and the aluminum cases. The silver your using help, but can also promote the corrosion your trying to prevent. The copper prevents this and lubricates the seating of the studs. hope this helps. Blessings brother.
One trick i have used just to be meticulous with setting ring end gap is sliding the piston into the cylinder, lowering the ring on to the top of the piston then lowering the piston down to make room for the feeler gauge. Guarantees that it is in there perfectly straight. Probably unnecessary but it helps me sleep at night
That looks sick! And I'm glad you are doing well. We are are here for you!
I’m fairly new and I love your videos, I didn’t know u are battling cancer. Best of luck. Stay strong
Life is good to you!we are trying to enduro with xmm250.
Use the piston crown to push the rings into the bore to check gap. Makes the ring straight.
My brother had 16kgs of lymphoma and i understand the struggle of trying to support the treatments so i really hope you get through this
I am a licenced mechanic. Wristpin circlips always must be installed on any piston so the ends of each clip are at the 12 o'clock or 6 o'clock podition. Any other position and the odds are that the flexing of the piston when the combustion takes place, which flexes the clips & their hole/grooves and the clip(s), will move out of their groove and damage the piston/cylinder. It will only be a matter of time before the engine is damaged.
Use the piston in an upside down position to gently push a ring squarely into the cylinder to ensure the ring is properly positioned squarely in the cylinder for end-gap measuring.
I would dissassemble the engine & properly install the circlips. Any instructions with the new piston or shop manual will instruct to the proper installation position. Many engines, 2 and 4 stroke of all sizes and number of cylinders, including car engines have had circlip damage due to improper installation.
Do not put grease on the base gasket. It needs to be ensured it sits evenly flat everywhere. This could eventually cause a case leak in a 2 stroke which if not caught would seize the engine as it sucked in air.
Good lubing on all parts as no metal to metal contact is wanted when the engine is initially started. Then of course go through the heat cycles to break it in like owners manuals and race shops do. This will provide the best performance and life.
Good luck. Good video otherwise.
What about the holes in the piston to cool the exhaust port bridge? He missed that one.
Man... The tutorials, things you are showing to us are awesome! That makes me feel to take my bike apart and explore, what's in there as i haven't did that once myself, but my dad does so my bike wouln't blow up
You can use the piston to push the rings in square to the bore for your end gap.
The honda CR250R service manual calls for anaerobic threadlock on the cylinder studs. I was thinking antiseize also, because of the steel bolt into and aluminum thread.
Engine looks killer man, wish you could get ahold of my CR500R.. Say strong 💪 and always keep it pryme 👌
That's so awesome. The way the engine turned out, and all the companies helping out.
Thank you for all this beautiful video's you help me very much with my CR 250 rebuild, I am a big fan of you!!!! (From Greece)
Late to the party but you might find it easier to put the piston with rings into the cylinder and then put the locate the piston onto the connecting rod. Loving the videos - so much to learn. Skäl David
Just bought 11 raffle tickets and a pack of stickers. Wishing well with your recovery. My mother went through chemo for breast cancer and it was tough. But shes been in remission for 2 years now because of it. Best of wishes from minnesota.
Also that engine looks amazing.
Little hint when checking ring end gap, light oil bore and use piston to push ring down bore. This helps center rings
this is just amazing we have all been waiting a long time to see this congrats man! An easy way to do ring end gap is to bring the piston up from beneath and push the ring until its level. And its good to use some assembly lube.
proper way of checking the gap ring is to position the ring vertically and push it down slowly. when the top portion of the ring labeled on the surface of the block just slowly position into horizontal and then apply the piston to push the ring inside to make it evenly positioned. thats the way you can get exact measurement of the gaping and make your life easier .
Aren't you supposed to put those circlips in strait up and down instead of sideways like you did? Because the piston going up and down could cause them to compress and pop out.
Yes. And $300 to re-nickosil the cylinder taught me my. lesson.
kdxkyle was going to say the same thing
Yep, can’t have the circlip ends sitting in the grooves of the piston. It says that in my manual at least.
kdxkyle you are correct sir
@@tmk5522what does that mean? can someone link me a pic or smthn?
Awesome work, awesome channel. Get well soon dude.
love watching your videos! You are awesome Cameron. Stay strong! Best wishes from Germany.
I love watching videos like this. Informational without being too padded. Also, hope to see you ripping on that bike!
6:44 awww I saw that! Left stud was upside down 🙃 Good thing the editor flipped it for you!
Just watched all your videos on this engine build up to this point but it's late here in the UK so I'm headed to bed now.
Brilliant presentation by the way and fascinating to watch. 👍👍👏
Hey Cameron ! Wish you the best with your recovery ! i gotta say i couldnt wait to see that engine put together !
but the oiling holes has nothing to do with cast or forged pistons... they are there to cool the exhaust bridge ! no holes, no Cooling, that bridge is gonna heat up and crack !
Your work is amazing and Keep it Up buddy !
Sam
Are you not going to check the clearance on the head?
Good on you mate, brilliant video, hope the treatment goes great
Great to see you again Cameron. I can't wait to hear this bike ring ding ding. Make sure you name it too! It should start with a C. I named my WR426 Walter lol
Always clock the wrist pin circlip opening either at the 6 or the 12 o clock position.
My mum died from cancer the day after my 21st bday, I have nothing but respect for you dude you are an absolute inspiration and I eagerly await your uploads, I wish I had found your channel sooner. Wishing you the best of luck bro (Y)
You can use the piston upside down to center the ring
good to see ya in the shop and gettin it done! have tough we with ya
When measuring the ring gap, you could push the ring down a bit using the piston. That way it will be completely flat :)
GOOD LUCK!!!! So sorry to hear about this, wish the best for you!
Been waiting so long to see this bike assembled, looking sweet!!!
Cancer sucks cheesy C##k, looking forward for you kicking it's arse and putting a video up saying you've had a full recovery.
Stay strong and keep up the good work
my morning is great to see you build this engine.
Looks Great Cam... Getting there... No rush, we are here. Take care of yourself first.
Get well soon. Ill pray for your speedy recovery! More power!
A bit late with this comment. I usually insert the piston into the cylinder first and then drop that as an assembly over the connecting rod. Use a bolt or long socket or so to keep the cylinder at a certain height, and then push in the wristpin and put on the circlip. Find it easier that way. All the best..
Can’t wait to hear the sound of that beast 🔥 great job man, stay strong! Get weel soon , greetings from italy!
A lot easier to install the piston into the cylinder on the bench, then lower down onto the rod. Much less chance of damaging the bore too. I dig your videos keep it up!
You should have sent the piston with the cylinder when the cylinder was repaired so the repairer could set the piston to cylinder clearance more accurately. An easy and accurate way to square the ring in the bore is to use the piston to push the ring to the point you want to use for making the measurement - it should be checked near the top, a little above the ports and just below the ports and see if it has less gap at one point than another - set the gap for the tightest point. Assembly lube on the rings is not recommended. Too much oil in the ring land may carbonize when the engine is started and stick the ring in the groove - just wipe the ring with two stroke oil. Anti-seize is not recommended to be used on the cylinder studs - it will cause over torquing - a light coat of two stroke oil is adequate (dip the stud in oil and let stand vertical on a paper towel overnight). Holes in the front of the piston has nothing to do with being forged or cast - the holes are in the piston to provide lubrication on the exhaust bridge so the rings will last longer - I drill holes in all two stroke pistons that run in an engine with a bridged exhaust port whether they are forged or cast. Vertex does not drill the piston because it is an extra operation and increases the cost of the piston. Wiseco drills their piston because it is a high performance piston and it is reflected in the price. I STRONGLY DISAGREE WITH THE MASSIVE AMOUNT OF LUBE ON THE PISTON AND BORE - ONE DROP OF TWO STROKE OIL SMEARED AROUND THE LOWER 1/3 OF THE CYLINDER BORE IS ADEQUATE! One thing you failed to mention or do was to put two stroke oil on the bottom end of the rod and to put a few drops of two stroke oil in the feed holes for the main bearings in the transfer port base (one on each side) in the crankcase. You didn't detail the torquing of the cylinder base nut under the power valve operator - looked like you just tightened it with a box end wrench - how did you verify the torque on that nut?
I just rebuilt my crf450r love these videos keep them coming bro 👍
Motor is looking good...
Good Luck with your treatment Mate.. Hope you get well very soon..
I did something very similar to my KX250 20 years ago, I didn't ride it too much before I sold it.
OHHHHHHH BOOOOOY!!!!!! I've been WAITING for this. Watched the whole 30 part series, with the motor and final assembly being the most anticipated...wanna see that thing GO!!!
Love you Cameron. Thank you for always being a positive role model. Stay strong bro.
Engine looks sick, and you look sick too. Get well mate, do what you gotta do. For your next build can you do a mid 90's yz or kx, that would be pryme
I wish i could have you re build my cr250 would be a dream come true great job dude love your videos and how detailed everything you do is thanks for this video and all your others
you are the vlog I ever seen man!!! you are the man completly detail and clean job!! very very totally suberp!!! you are true mechanic!!
Great job on the Cr250 engine build. Great attitude on the cancer fight !
Get well soon!
Very nice job!!!! Good luck from Greece!!
Can't wait to see that bike fully built out and running.
That engine looks so pryme!! Looks like a straight up works engine from back in the day. Stay strong brother, soon cancer will be just a distant memory!
Hey Cam, I’m watching every video you’re putting on! I’m from Italy, and I’m supporting you! Can’t wait to see this bike done! We love ya’!
#staystrong
nice to see ya back in the shop doing the assembly!! Cant wait to see the bike get re-assembled. Its going to be PRIME!!!!!
That is one HOT looking engine and that Head is like the CHERRY on top. GOD be with You and all the wonderful people everywhere that have come to your side in this time of trials.
Easy way for making sure the rings are straight before measuring them is take the piston push it down and it will straighten the ring.
Thanks for the video and good luck with your health man! You can beat cancer!!!
Love camerons positive attitude
Cam use the piston to push down the ring its best that way crown first .
hope you will get better, mutch Love from Finland, and love your videos
Really curious, is the surface rust on the connecting rod not an issue? Just seems like something you would want to clean up before assembly.