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- Опубликовано: 6 окт 2024
- (Part 1) This 2016 CRF250R is getting a good freshening up with a big bore kit, new hot cam, timing chain, and intake valves. On the bench!
Link to part 2 of this video... • 1:11 CRF250R 2016 (PT ...
Link to how to remove and install piston circlips... • 1:11 Pesky Piston Wris...
Donate Race Fuel link... www.paypal.com...
Thanks for watching!
upallnight91@hotmail.com
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Got up earlier than normal this morning and had enough time to watch this while drinking my coffee before work! Thank you, and keep 'em coming. I learn something new with each one.
Nice! I didnt get up as early as you but I'm having a coffee right now myself and about to head back into the shop to finish this motor up 😄
I ride old stuff but i work on everything. You are making some killer info videos, doing gods work for guys trying to get stuff running. Keep it up from Colorado 👍
Hello. Thanks! I work on everything too! Old and new. The old stuff is way cool, just hard to find parts sometimes. Thanks and I will do my best, thanks for reaching out from Colorado. My wife will be flying out to Colorado tomorrow for a week to visit her brother.
I really don’t why but in my area you see very few Hondas. Great job as always
Thanks! Yeah its funny how that works. Here in Florida it seems like bike brands go in trend. Right now its a bunch of yamahas and hondas. But 4 years ago it was a bunch of KTMs
Yea right now it’s Yamaha and Kawasaki in our area. A year ago you could find one at a dealer anywhere. You had to drive for miles or get on a waiting list to buy a new Yamaha or Kawasaki. KTM Husky and Gas Gas are are everywhere in the dealerships I don’t think they are selling good right now
@@tndeere2 Right. I have a sore spot at the moment for the "KTM" bikes lol. A gas gas 450 here needs cases. The frame vin and the frame decal says its a 2023. I ordered all the part and well they are different. Its actually a 2024. Not sure if they did a early year change over or what but crap I wish they would be clear on the decal and say this might be a 23 but its actually a 24. They change stuff around so much and dont tell anyone and we are stuck trying to figure it out.
@@UpAllNight91 that’s aggravating. I was at Mountain Motorsport a huge dealership just outside the Smoky Mountains yesterday they had a showroom full of KTMs heavily discounted,2 CRF450 1 RMZ450 and no Yamahas or Kawasakis. I’ve heard KTM is having some financial trouble due to poor sales but I’m not sure if that’s true or not. Anyway good luck on that Gas Gas
Hey! That motor looks familiar! Can't wait to see part 2 and then put her back in and rip! BTW, the motor's got 140 hours on it.
😅 Shes doing great at 140 hours! I should have part 2 up late tonight or tomorrow some time. Looking forward to hearing how she runs!
Thanks man! I always learn alot here on this channel. For bikes I only have 2 smokers in the garage, but when I want to mess with valves and cams I turn to my air cooled vw engines. Maybe when I finish paying off my '24 YZ250 I'll finally take the plunge and grab a '25 YZ450F. I have that valve spring compressor you use in this video.
Do you ever have a need to measure piston to cylinder clearance with a 2-3" inside micrometer and dial bore gage? Maybe soon you can walk us through that if it is something you're working on anyway. Take care and stay safe.
P.S. you are right - the world has gone crazy!
Yay another video!
😆
Another great video!!!
Thank you Joel!
Valve wear is from heat and miles. WHat you displayed with the intake valve is perfectly normal in appearance. That new valve will have that same shiny seat mark in a few hours of run time.
Do NOT use abrasives on the head surface!! MLS gaskets are not in any way forgiving and will leak like the Titanic... Use brakekleen and get any residual residue out of there!! That material can cause a headache in short order. My Jeep with 3255,000 miles had valves looking just like those... I tested for leakage by filling the combustion chamber with solvent.
Exhaust valves are most likely to be cratered since they have nothing but heat. Intakes are typically cooled by the air/fuel mixure coming in.
Never, ever use Scotch Brite on any engine parts. The residue is rarely completely removed and will take out bearings, cranks and cams.
Annnd, why not replace the exhaust valves, since they take the brunt of wear and tear?
Hello. These valves are titanium valves and are totally different than whats used in the automobile world. I have removed valves with as much as 200 hours on them and they have not turned silver where they contact the valve seat. Here is a example, if you slide the video in the following link to the 31:30 mark you will see a set of intake valves I removed from a yz450 that had 60 hours on it and you will see once I whip them clean you will not see any silver on them nor can you even tell where they been seating at. Here is the link ruclips.net/video/4KJ7z6PvItM/видео.htmlsi=1nPqD21JFKOehqXF ... They actually looked as good as new once cleaned up and where sold on ebay as good used valves. The exhaust valves are the same way on these bikes, they will not show any wear or silver on the seating surface if the bike is healthy. Once any of the valves wears past the top layer of the valve they will sit deeper into the head which will tighten the valve clearance and require a adjustment. Yamaha states that if it titanium valve needs to be adjust more than once then it needs to be replaced. The reason they say that is because if it needs a second adjustment it has most likely worn past the top layer of the valves surface and at that point it will keep wearing fast and not hold a adjustment for any length of time anymore. I have seen this myself and its true. On these dirt bikes with titanium valves its that top layer of the valve thats important, and its mainly dirt that removes the top layer. For some reason after the dirt that has gotten into the motor is burnt it doesnt seem to hurt the exhaust valves on the way out. This is why its more common to only need a new set of intake valve and not exhaust valves. The intake valves take the hit of dirt getting in and the exhaust seems to be unaffected. This is just my first hand experience, I been working on these things since 4 stroke MX came out in the early 2000's. I'm not always right but I'm always paying attention and trying to learn so I can do the best job possible.
Anthoer great video!! Wait a minute we can mail u motors that would he be great when it's time I'd love to mail u my yz 125 2023 motor for bottom end rebuild
Yes Sir! You can mail me a motor if you need some work done. Hopefully your 23 YZ125 is like my wives and keeps going and going and going though lol. Heck even my 21 YZ125 has 130 hours it and the crank still checks out as good as new. I show that bike no mercy and stay on the rev limiter but she just handles it!
Oh this is good news cause your super good tech and I typically do all of my own work but some stuff iam not comfortable doing and if it ain't me then I want it to be someone like me and that's you lol that's awsome about stock bottom end still they seem to be tough bikes
@@TimmyStasny-ow3hl Right on. I got ya if you ever need a bottom end done, but hopefully she just keeps kicking and kicking!
Whoever put that bent circlip in there got damn lucky that that thing stayed in there. You know what happens when those come out first. It tears the shit out of the cylinder mashing up the circlip and then the wrist pin will come out and start digging into the cylinder. Bad bad news.....
The spoke with the owner and he says that bike was on the original top end. I would hate to think Honda sent it out like that but I guess anything can happen. Dam good thing it hung in there lol
How did this guy know the bottom end? Didn't need bearings. Did he guess or did he pull it apart and check it?? If that bottom ends bad those crank bearings are shot. He's going to need to spend some more money......😎🤓
I dont think he knew but it was running good when removed. It checks out well though so I think it will be good.