FireMedic
Registered
2007 hayabusa 10k miles stock motor with Brock's alien head exhaust.
I brought bike to a well know drag bike builder because 2nd gear went out and I figured since motor was going to be split open i might as well upgrade it a little.
Simple street race setup: port/polish head, dual intake cams, valve job, shim springs and Rebuild tranny with undercut all gears. Direct port dry nitrous setup with air shifter.
So hears the problem:
I pick up bike last week and get it home 2 hours away and take it for a ride no more than 3 miles and not over 6k rpm. Bike dies and won't start. this has happened 3 times this week. 1st time changed stock cam chain tensioner, 2nd time changed stock tensioner, 3rd time put in manual tensioner (yesterday).
I go pick it up and builder says he rode around the block and has whacked the throttle over and over and it's working fine now. I even rode it around the block a few times low rpm riding around neighborhood.
I get home with bike again and unloaded it and take it for a ride less then three miles and it jumped timing again just like times before. This time I was in 3rd gear and as I downshifted into 2nd the bike jumped timing again.
Anyone have any ideas of what could be the cause. Builder took cover off and said cam chain looks to be in good shape.
I brought bike to a well know drag bike builder because 2nd gear went out and I figured since motor was going to be split open i might as well upgrade it a little.
Simple street race setup: port/polish head, dual intake cams, valve job, shim springs and Rebuild tranny with undercut all gears. Direct port dry nitrous setup with air shifter.
So hears the problem:
I pick up bike last week and get it home 2 hours away and take it for a ride no more than 3 miles and not over 6k rpm. Bike dies and won't start. this has happened 3 times this week. 1st time changed stock cam chain tensioner, 2nd time changed stock tensioner, 3rd time put in manual tensioner (yesterday).
I go pick it up and builder says he rode around the block and has whacked the throttle over and over and it's working fine now. I even rode it around the block a few times low rpm riding around neighborhood.
I get home with bike again and unloaded it and take it for a ride less then three miles and it jumped timing again just like times before. This time I was in 3rd gear and as I downshifted into 2nd the bike jumped timing again.
Anyone have any ideas of what could be the cause. Builder took cover off and said cam chain looks to be in good shape.