Ive got a 91 Yz 250 that I got for near nothing because the crank bearings are shot,to split the cases Ive got to get the fww off.Ive never even seen one before so no idea how it comes off.Theres no nut on it so I guess maybe it threads on?Around the edges there looks like theres setscrews holding in place but there all striped out,so I drilled them out,and still wont budge.Any help would be greatly apreciated :bang:
How to remove flywheel weight
- Thread starter rotorfly
- Start date
The flywheel weight is attached to the flywheel, take off the flywheel, and the weight comes off with it.
There's a nut on the end of the crank, holding on the flywheel. Remove that, and thread a flywheel puller into the flywheel and then tighten the bolt in the puller, and the flywheel will come off.
You can get a flywheel puller at just about any good bike shop for around $15 bucks.
There's a nut on the end of the crank, holding on the flywheel. Remove that, and thread a flywheel puller into the flywheel and then tighten the bolt in the puller, and the flywheel will come off.
You can get a flywheel puller at just about any good bike shop for around $15 bucks.
On some Steahly FFW's there is a special tool that you need to bolt onto the weight to unscrew it from the crankshaft. It is basically a flat plate with a 3/8" square hole in the middle and 2 round holes on each end that you bolt into the weight. Then you just use a 3/8" drive to remove it.
You will still need a flywheel puller to remove the flywheel.
You will still need a flywheel puller to remove the flywheel.
davefordham
Member
- Apr 28, 2008
- 2
- 0
I just had this exact same set-up on my boy's 2000 YZ 250. Four allen-head set screws holding the flywheel in place, no nuts at all. If they were stripped, I would suggest drilling them out as you did, and then re-tapping a little larger later. To get the flywheel off, we bolted a 3 foot piece of hardwood (metal may have been better . . ), to the flywheel using the 2 threaded holes in its outer surface. I think these would be mounting holes for the factory removal tool. Then we re-installed the clutch basket on the crankshaft splines on the other end, and held this carefully with a chain wrench ($10. at auto supply store - Princess Auto in Canada). Then using the leverage we unscrewed the flywheel from the threaded end of the crankshaft (NO PULLING NEEDED - we originally tried this . . . ). Don't lose the Woodruff? half-moon locking key that holds the flywheel in the correct place on the crankshaft. The final disassembly required setting the left side crank case up on wooden blocks, placing a drift (or something hard, and about 1/8" in diameter) in the centre of the threaded end of the crankshaft, and whacking her really hard. This released the crankshaft from its left side bearing. Now a question >>> does anybody know how we can split the crank shaft weights to get at the connecting rod bearing?? Thanks.
