Vmax-4 Forums

I have a 92 750 with psi quad pipes, minor cylinder porting and boyseen reeds, the issue i am having is the snowmobile bogs from a dead stop to wide open throttle. It originally had 55 pilots in it so I went down to 50 with the same issue and i am now down to 47.5's with it not getting any better. I feel it acts rich yet due to the spitting and sputtering and then taking off. Ive also messed with the fuel screw on each pilot size to no avail. Help would be much appreciated. Thanks!

Hello everyone,


Need someone with engine experience to help me with an issue of no power. It starts and idles fine from what I can tell but when you gas it its slow to pickup no snap to it at all. Last thing that happened was I busted a belt at top speed and now I wonder if I got cranks out of phase? Can you
tell by the sound if the engine if it's out of phase or will it even run at all ? I'd like to add a video on here and have someone tell me if it sounds normal but I don't see how to add a video.


Thanks

I'm new to clutching and was wondering if anyone could point me in the right direction. I have a stock 93 which gets ridden between 5000 and 8000 ft. I have the secondary set up for the altitude per the stock settings. I thought the primary was stock so I ordered the proper white yellow white spring 25#/98# for the altitude. When I dug into the clutch I found out it was set up with 89a weights with two aluminum rivets per weight and a white pink white 30#/103# spring. This setup would run 8100-8200 rpm and worked ok but it was a dog off the line and would engage at 2600-2700 rpm. I figured the spring was tired so I put in the white yellow white spring which is close in specs and now it engageges at 2500 rpm. It's on the trailer so I don't know what rpm it maxes out at bit I need to get the engagement up. My thinking is to put in a white silver white 35#/110# or the yellow orange 50#/107# I don't have experience with clutching so I don't know how much preload will change engagement rpm but going from 30 to 50 seems like a lot. Any advice would be greatly appreciated.

I'm new to clutching and was wondering if anyone could point me in the right direction. I have a stock 93 which gets ridden between 5000 and 8000 ft. I have the secondary set up for the altitude per the stock settings. I thought the primary was stock so I ordered the proper white yellow white spring 25#/98# for the altitude. When I dug into the clutch I found out it was set up with 89a weights with two aluminum rivets per weight and a white pink white 30#/103# spring. This setup would run 8100-8200 rpm and worked ok but it was a dog off the line and would engage at 2600-2700 rpm. I figured the spring was tired so I put in the white yellow white spring which is close in specs and now it engageges at 2500 rpm. It's on the trailer so I don't know what rpm it maxes out at bit I need to get the engagement up. My thinking is to put in a white silver white 35#/110# or the yellow orange 50#/107# I don't have experience with clutching so I don't know how much preload will change engagement rpm but going from 30 to 50 seems like a lot. Any advice would be greatly appreciated.

Is it gonna be ok to just change the one or am I askin for trouble and just swap out all of em?