1997 Yamaha 250 atv Timberwolf fuel tank removal and clean

SOURCE: won't idle steadily

Check the rubber boot that joins the carby to the engine to often have seen the hose clamps over tightened therefore creating a split in the rubber letting to much air in giving the rough idle eventually you wont be able to start it at all (have a good thorough look inside an outside of boot doesnt take much)

SOURCE: what is valve clearance for a 250 yamaha timberwolf

what an *******. If I had a manual or my library had one I wouldnt be asking the question. If I need help fixing something dont tell me to go jump in a lake just dont answer

SOURCE: Need to find serial number on 1997 Timberwolf 250

It should be stamped on the left hand lower frame.

17 SOUTH INDUSTRIES

• 167 Answers
• Posted on Feb 16, 2015

SOURCE: just redone the top end of my 91 250 timberwolf atv 4x2

take the spark plug out, take valve tappet covers off - you may as well check valve clearance while you're there - on the bear trackers a little older - the lever for forward or reverse - the large screw facing the back of the bike of the three - take that out - and you can see the timing mark on the flywheel. take the pull start off. move the motor counter clockwise very slowly with that large screw that holds the selector lever handle down off - look down that large hold until you see a T I the TDC is when that line just past the T is centered in the hole. Now - for the chaiin - take the chain tensioner out - ((check it by turning the inside with a screwdriver and getting it to go back in - two bolts on either side (8mm) with a 12mm in the middle. 8's hold it in - 12 keeps pressure on the tensioner. they're not adjustable - but once the 12mm bolt is out of the middle - you can use a flathead small screwdriver to turn left and right and get tensioner to compress. If you have to take chain off due to it not being lined up TIE A METAL WIRE AROUND THE CHAIN BEFORE TAKING OFF THE SPROCKET - IF IT FALLS INTO THE CRANKCASE WITH NOTHING ON THERE = YOU CAN'T GET IT BACK OUT WITH TAKING THE CASE APART. Now - on the camshaft sprocket - there is a mark on the sprocket and one on the housing at like the 12 oclock mark. When that mark on the flywheel is at tdc TI , the mark on the camshaft should line up on the housing. Make a few goes around to make sure that timing chain makes it all the way back around to that mark. You'll actually make a rotation or two on the flywheel before that chain has made it all the way back to that mark.
those two are lined up at the same time and you're good to go. The valve clearance is imperative and this is the best time to do it. Intake clearance is .002 - .004 on later bear trackers and exhaust side is .004-.006" on later models as well.