Posts
146
Joined
4/19/2020
Location
Anza, CA
US
BeachMX
2/16/2021 11:10am
2/16/2021 11:10am
Edited Date/Time
3/6/2021 7:01am
Hey everyone,
I have a 2020 YZ250f with about 60 hrs on it, and it began "lurching" upon heavy acceleration this week. It seems fine in the upper revs, but the low end torque makes it "Slip-catch-slip-catch". Does this sound like a clutch issue? I replaced the clutch with a tusk comp clutch about 20 hrs ago (didn't really need it) so I am wondering if that's it. I am thinking about just ordering a OEM clutch setup with new springs, but wanted your experiences and advice first.
I also use fully synthetic yamalube oil, so could that be it? I am a vet guy, and don't got too hard on the clutch or engine.
I have a 2020 YZ250f with about 60 hrs on it, and it began "lurching" upon heavy acceleration this week. It seems fine in the upper revs, but the low end torque makes it "Slip-catch-slip-catch". Does this sound like a clutch issue? I replaced the clutch with a tusk comp clutch about 20 hrs ago (didn't really need it) so I am wondering if that's it. I am thinking about just ordering a OEM clutch setup with new springs, but wanted your experiences and advice first.
I also use fully synthetic yamalube oil, so could that be it? I am a vet guy, and don't got too hard on the clutch or engine.
Ryan
Basket is cool.. I'm just surprised that the tusk clutch only lasted 15-20 hours at best, and I'm not a clutch abuser. I have heard of some issues with the gearbox on this year, so I am hoping that it is the clutch!
I will probably just go back to stock with new springs.
Thanks again!
Matt
The Shop
Any ideas? The best way to describe it is it "on-off-on off"... it feels like my rear tire is spinning on the rim or something(it's not... I checked).
Runs perfect, starts right away, revs out great in neutral on the stand..
It was definitely the transmission... 2 shift forks and 4 gears(dogs).
Stripped it down myself (first time ever doing a bottom end) replaced 2 shift forks and 4 gears (bad gear dogs).
I decided to do a top end while apart as well (piston, rings, cam chain) .... also my first time in a 4 stroke top end.
I just go done today, and it fired right up once back together. I took it for a little putt on the street, and all gears are working properly.
I'm going to the track in the morning for a light break-in/gearing check, so I will report back!
Matt
All parts were there from factory. I am hoping that these will last awhile (60-70hrs) before I have to replace again.. all and all about 500 bucks in parts.
I have heard of some people switching to the 2015 tranny in this bike... maybe I'll look into that.
Pit Row
Rode the bike today for the first time since the new gears/top end/timing chain/valve adjustment, and all seems good! I took it very easy, but no slipping that I could feel(I wasn't pushing it though due to breaking in the new piston).
will keep you posted!
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