Belle1 replied to Belle1's topic in WR250F/YZ250F/YZ250FXThank you for the responses, I'll try that out when I get back out to my dads sometime this week. I did wind up the tensioner enough for it to be put back in easily, so I don't think the chain was damaged. We didn't touch the cams.
I have a 2001 WR250f(N) with a bore kit. The bike was not run very often and I believe the carb became dirty from old gas sitting, but I'm not sure because I'm not mechanically inclined what so ever. I assumed this because the bike would backfire quite a bit when I would get it running, but wouldn't smoke or smell like burnt oil. Instead of messing with the carb my dad figured it might have had a timing issue and he removed the valve cover and the timing chain tentioner, which to his suprise was self adjusting and was confusing to put back on as he is more used to older bikes. After we put it back together, the kickstarter was able to be moved by hand without the use of the decompression lever, (which also wasn't effecting anything) but still was somewhat difficult to move. He can't tell how to set the timing because the bore kit is marked different from the stock manual. The guy I bought it from a few years ago had it marked, "YZ timing 1 pin back". Please help, I don't want to have to bring it in and spend a ton of money I don't have.