slicing keyways on fly wheel any fixes???

[stauffracing#4]

specs 100cc motor fresh top end. air cooled custom head pushing 240 psi on compresion gauge.

[wrhracing]

The key is there to only set the timing in mass production. Not to keep the flywheel from rotating.

Check the taper surfaces on both pieces, put in a new key, get the green sleeve retaining loctite and apply it, then torque wrench it on.

[markvette]

and wait for crank bearings to fail.

[jetski_dawg]

thats what its sounds to me like too mark,,,i just rebuilt an engine with the crank bearing bad and it wouldnt start with the electric starter

[quadscrib]

WTF????? Im definatly not following this...and Im VERY curious what yer all talking bout

[markvette]

over 200 pounds of compression on the motors is a failure waiting to happen. been there done that and seen it many times. that is why i try to keep my motors in the 180 pound range.

Mark

[mmullins14]

Originally posted by markvette
over 200 pounds of compression on the motors is a failure waiting to happen. been there done that and seen it many times. that is why i try to keep my motors in the 180 pound range.

Mark Mark, Are you running ceramic bearings? I have run 210 to 260 pounds of compression for 4 years in several engines. I have only had crank bearings fail once. I used ceramic bearings in that one and that was the only one that had trouble. With standard bearings I don't thik there is an issue with that kind of compression.

[cody 911]

you could also just put a pvl on they dont use a key way we have had a few 48 cranks fail