Thread: track test problems

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Originally Posted by Dave Severson

Don't see where the rings would have anything to do with it.....


What kind of oil pump is that, Moon???? Looks like there must be seals in between the stack plates, sounds like one of them could be bad.... Another thing could be that the scavenge lines, either the threads or around the hoses are sucking air.... Had that problem on an old pan/shovel many years ago.....

Dave, The pump is a company called zipper, they make alot of aftermarket stuff for these fueler bikes. I will split it this afternoon and check the seals between the layers. all the lines pushing and pulling are new Earls AN fittings, as far as the allen screw, I dont know whats behind it yet.,

Denny, the O-ring went somewhere, and from where it came at top it had to pass through the pump now that you got me thinking about that.

John, the vibration idea is a good thought. It is mounted on a rubber pad directly in front of the motor. I'll move it to the rear of the bike as far away as I can. The rider cant see it anyway, its solely for the crew to look at. I'll set it on the ground off the bike for a test. But this damn thing vibrates so bad with 94% nitromethane. It litteraly walks on the stand 4 feet across the ground on warmup with 2 people holding it down. Thanks everyone for your thoughts I will post what I find in that pump tonight,