My quad broke its crand/flywheel woodruff key. Anyone know what size it is? cylinder timing is correct, but firing timeing is off due fly wheel slipping on shaft.

thank you,
Corby

thought some of you would like this one, yamaha trivia but seriously i need to know the size.

 

as far as measurements im not sure lol but i believe thats the halfmoon key, theres another one on the warrior thats like a rectangle and thats for the counterbalancer i believe

 

Yep it is half moon. My motor keeps breaking keys. I did a motor swap 89 motor to 99 bike and used the 99 jug and fly wheel and think it is balanced different. I am going to get a new key and try the 89 fly wheel and see what happens. Bike runs good until the key snaps.

 

Alright, found the problem. stater clutch, bot how do you get those darn allen head bolts out?

 

Its a 5 mm allen head , if it strips get a easy out set , drill and then tap the easy out in and turn it left it wil come out it takes some time.