JasonGOSU Posted April 28, 2006 Report Posted April 28, 2006 I bought a wiseco 4mm stroker crank about a year ago. It had 180psi in both cylinders. I ran the stock carbs, stock reeds, 4+ timing. I took off hard in 2nd gear then shifted to 3rd when I heard a backfire. I shut of the banshee and checked the engine. Tried to kick it over a couple times and nothing. I found out that the crank had broken on the inside of the case right at the bearing on the flywheel side. The guy I bought it from has apparently had a bunch of the cranks break in the same spot and wiseco will not take them back. He's going to turn me a new shaft and press it in. Has anyone heard of the this? Does anyone know the cause of it? To me, it looked like some bad material that they made the shaft out of because I can't imagine my banshee producing enough force to shear that shaft. Quote
Ducman Posted April 28, 2006 Report Posted April 28, 2006 I would pull the motor and ship it to a knowledgeable builder for a tear down, inspection, and rebuild. I'd hate to fix it and have that happen again. A good builder would probably find the cause of your crank failure. As for the problem, I'm wondering if the flywheel is seriously warped or out of ballance or something like that. Quote
NYUK Posted April 28, 2006 Report Posted April 28, 2006 i heard on planetsand that was happening.might wanna search over there. Quote
JasonGOSU Posted April 28, 2006 Author Report Posted April 28, 2006 Anyone know where to get TZ bearings for the banshee? Quote
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