My buddy has a 1996 mach 1 670 he just bought this winter. Ran fine on first ride he ended up rolling the sled and now it runs funny. When it hits around 4000 rpms the sled tends to want to bogg out. It is bored 30 over and has jets one size bigger than stock. We cleaned the carbs, changed the seats and tried different jet sizes stock and the one size biggerbut doesnt change. When we first took the carbs apart to clean and put back together sled ran fine for a little bit but a lot of poppin noises at higher rpm and then it would just start to run funny again.
Full Version: 1996 Mach 1 670
My buddy has a 1996 mach 1 670 he just bought this winter. Ran fine on first ride he ended up rolling the sled and now it runs funny. When it hits around 4000 rpms the sled tends to want to bogg out. It is bored 30 over and has jets one size bigger than stock. We cleaned the carbs, changed the seats and tried different jet sizes stock and the one size biggerbut doesnt change. When we first took the carbs apart to clean and put back together sled ran fine for a little bit but a lot of poppin noises at higher rpm and then it would just start to run funny again.
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