flattrackin92 Posted June 30, 2008 Report Share Posted June 30, 2008 Well here it goes I have a stoke stroke banshee and i am 60 over, I went with vitos pistons and didnt put the base gasket in for more compression, I have pro design cool head with 16 cc domes and everyone told my crank wouldnt hold up to that compression. Well it ran great for 5 races but now im hearing a bad vibration or rattiling coming from the bottom end. and the head is vibrating severly and also lost some compression. Im guessing the crank and bearings went out. so what im getting at is where can i get a good trued and welded crank Quote Link to comment Share on other sites More sharing options...
mopar1rules Posted July 1, 2008 Report Share Posted July 1, 2008 you can send it to jeff @ midwest crank in green bay, wisconsin. he does the warranty work for yamaha, covering 28 states. let me know if you want the address Quote Link to comment Share on other sites More sharing options...
NYUK Posted July 1, 2008 Report Share Posted July 1, 2008 how about 1 of the site sponsors. i always got top notch service from jeff at fast. Quote Link to comment Share on other sites More sharing options...
No Limit Powersports Posted July 1, 2008 Report Share Posted July 1, 2008 Well here it goes I have a stoke stroke banshee and i am 60 over, I went with vitos pistons and didnt put the base gasket in for more compression, I have pro design cool head with 16 cc domes and everyone told my crank wouldnt hold up to that compression. Well it ran great for 5 races but now im hearing a bad vibration or rattiling coming from the bottom end. and the head is vibrating severly and also lost some compression. Im guessing the crank and bearings went out. so what im getting at is where can i get a good trued and welded crank Is the bike ported and did you ever do a compression check, or squish test? You want to make sure that the motor can be set up for no gasket. Quote Link to comment Share on other sites More sharing options...
dajogejr Posted July 1, 2008 Report Share Posted July 1, 2008 What is your elevation and how much cranking PSI do you have with no base gasket and 16cc domes. Trued and welded crank or not, that's a ticking time bomb in a bike near sea level that held WOT all the time (your screen name is flattrack, so I assume that's what you do...) Quote Link to comment Share on other sites More sharing options...
flattrackin92 Posted July 4, 2008 Author Report Share Posted July 4, 2008 I believe my elevation is around 700 or 800 ft above, and i had 200 psi in both cylinders. and im not sure what my squish was but my engine builder told me that it was very close. I just found out that the crank bearing came apart and trashed the crank, rods, cylinders and pistons. That really sucks cause im running in first place in our points but oh well i guess you will have that. Quote Link to comment Share on other sites More sharing options...
dajogejr Posted July 4, 2008 Report Share Posted July 4, 2008 Find a new engine builder. For long, wide open racing like that you don't want that much compression and or a tight squish...you're making too much heat, putting too much stress on the motor. If it wasn't the crank, it'll be something else next. Quote Link to comment Share on other sites More sharing options...
tgbanshee Posted July 5, 2008 Report Share Posted July 5, 2008 (edited) Jeff at F.A.S.T. Racing has a good selection and great prices. F.A.S.T. Racing I'm curious, what type of gas were you running? Edited July 5, 2008 by tgbanshee Quote Link to comment Share on other sites More sharing options...
flattrackin92 Posted July 5, 2008 Author Report Share Posted July 5, 2008 (edited) I run vp ut4 which is a high octane specificly made for two strokes and i run castor 927 oil at a 24 to 1 ratio. I was wondering were is jeff at fast located at and how do i get ahold of him? Edited July 5, 2008 by flattrackin92 Quote Link to comment Share on other sites More sharing options...
rubberneck Posted July 5, 2008 Report Share Posted July 5, 2008 here you go: http://www.farmandsandtoys.com/index.asp Jeff is a good guy Quote Link to comment Share on other sites More sharing options...
Hulio-mv Posted July 5, 2008 Report Share Posted July 5, 2008 F.A.S.T. good guy good customer service and he can help you set up a more reliable motor for your riding style Quote Link to comment Share on other sites More sharing options...
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