How To Replace a Slipping Clutch Plates in a Yamaha Moto4 YFM200DX ATV
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- Опубліковано 12 сер 2022
- / wrekkedoffroad / @vermontlife www.buyjimmyabeer.com/
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This is a one beer job (or can be if you have your gasket or RVT ready ahead of time). Otherwise...
We have had this 1986 Yamaha Moto4 YFM200DX for more than 15 years. After I bought my first quad we bought this one for Anne Marie rom a fella who had just rebuilt it. Anne has put it through a lot of mud and creek beds over the year and I've never done any clutch work on it. Frankly, I haven't done much work to this one at all. It's just that bullet proof. It's now time to swap out the friction plates and springs.
Torque Specs from Clymer manual for YFM200
Clutch Cover Screws: 5.1ft-lbs
Primary Clutch Nut: 56ft-lbs
Clutch Spring Screw: 4.3ft-lbs
Clutch Boss Nut: 36ft-lbs
Shift Cam Segment Screw: 8.7ft-lbs
Clutch Adjuster Nut: 11ft-lbs
Primary Clutch Wear Limits:
YFM200 Shoe Thickness 1.5mm
Secondary Clutch Limits:
Friction Plate: 2.8mm
Clutch Plate Warp Limit: .2mm
Clutch Spring Free Length: 32.9mm
In this video:
- In the intro enjoy some beautiful drone footage through low hanging fog and witness a daring frog escape from our Labradoodle Chloe.
- Learn how to swap clutch and spring plates without needing to drain and change the oil on a Moto4.
- Then see me decide to change the oil and filter anyway... Parts links and how to included.
Support the fun by liking and subscribing bit.ly/2kPku2P
Parts used in this video: (Thanks in advance if you purchase from these links as I get a small commission.)
Vesrah Friction Plates: amzn.to/3SJjfgS
Vesrah Clutch Springs: amzn.to/3w0IGkc
Clutch Case Gasket: amzn.to/3w2D0q5
Locking Washer: Had to hunt Ebay for 'YAMAHA Clutch Lock Washer 1983-1998 YFM200'
YamaLube 10w40 Wet Clutch Oil: amzn.to/3C6p2am
#OneBeerRepair
#moto4
#ATVRepair - Розваги
I've learned that when buying case gaskets for either a housing of some sort such as your gear box it's wise to order two incase you tear one so you're not sitting in idle waiting for a second one. If you don't have any hiccups with it when installing simply return the second one. Learned that the hard way 🙃
Good call as I've had a few hiccups over the years...
Great video, just in time for me needing to inspect my clutch and centrifugal on the yfm250.
Knowing what you know now, do you think the clutch was slipping? Did the friction plate adjustment help?
From other videos I've seen the grooving in the centrifugal clutch is a big issue for slipping and not grabbing.
I'm confused as to what the clutch pack with the fibre and steel plates does compared to the centrifugal clutch. What are their roles?
Clutch was definitely slipping but it wasn’t noticeable when the motor was cool. Once you got the oil hot the problem would surface. Replacement plates definitely helped. I didn’t adjust the screw on the outside of the case this time around but I had previous to this. I can’t say it made any difference other than making the foot shift feel smoother. I’ll have to study that mechanism more. The grooving, absolutely clean that up. I did that on a few other quads and it really helps bring the bite back.
Regarding the clutch pack and centrifugal… my opinion would be that the clutch pack is essentially how you engage and disengage the transmission during semi auto shifting. The centrifugal, and the gear behind it with the six small springs, seem to reduce any shock to the gears and transmission during shifting at high rpm. Just my opinion but if thought about why have two clutches on the semi autos and that’s my best thought :).
What’s the center nut torque spec? I never saw them in comments!!! Please help
Hey I got a 1986 yamaha moto 4 225 it goes in 1st,2nd,3rd but no 4th 5th and grinds in gears sometimes do you think its the clutch plates?
I’d take to cover off for a look certainly. Make sure there’s no metal in there. If it’s all gears it could be the worm gear that goes to the drive shaft. It sounds like you may be looking at splitting the cases though.
Crackin
littery just got one of these moto 4 1986 wont shift into gear
This one was easy for years but gradually got harder. Shifts nice after new pads. Good luck.
Hi how do you torque the 4 bolts on clutch
After I zipped them down with my old Ryobi impact I put a torque wrench on to make sure they are all good. Id' have to double check the manual but I think it was 7ftlbs.
@@VermontLife odd. 7lb broke my bolts
@@joshpitcher0418 Teach me to try and pull from memory. :) I just went out to check the spec in my shop manual and it is 4.3ftlbs for the springs on the 200cc. How bad are the break offs?
@@VermontLife 2 bolts broken flush at the part they screw into
@@VermontLife ALSO what's the torque for the 2 center nuts on each clutch, as well as the 3 screws for the inner case, and the torque for the outer case bolts
Perfect video but it seemed like it could’ve been like 20 min shorter
I’ve playing with shorts as well for folks that want less story and more concise instruction.