jjsinaz
Active Member
Hi Folks,
I had a thread going on this about a year ago. I got tired of trying to fix it because it was seeming that I was spending more time working on the ski than I was riding it. So I have just been living with the problem. I'm now ready to start fiddling with it again, hence restarting the thread.
The ski runs good at anything above 3/4 throttle and anything below about 1/2 throttle. Problem occurs between 3500 and 5000 RPM. Just seems like it's only running on one cylinder in that range.
Been through the carbs several times. Tried another set of carbs, Have played around with the adjustment on the RAVEs and rebuilt the water box regulator valve.
None of this seems to make any difference in the severity of the problem or when it occurs.
Engine was rebuilt by full bore last year and the problem has been there since having the new engine. Engine has good compression and runs well on the low and top ends.
Could rotary valve timing that is slightly off cause something like this?
Last year someone suggested that carb sync might be the culprit. I need to look at that and try syncing using MDs "sound" method. Could this be causing the problem?
I'd like to figure this out because I run it at 3/4 to full throttle most of the time because if you want to slow down to a cruising speed, it just falls on its face. (Really tears through fuel and oil too)
I had a thread going on this about a year ago. I got tired of trying to fix it because it was seeming that I was spending more time working on the ski than I was riding it. So I have just been living with the problem. I'm now ready to start fiddling with it again, hence restarting the thread.
The ski runs good at anything above 3/4 throttle and anything below about 1/2 throttle. Problem occurs between 3500 and 5000 RPM. Just seems like it's only running on one cylinder in that range.
Been through the carbs several times. Tried another set of carbs, Have played around with the adjustment on the RAVEs and rebuilt the water box regulator valve.
None of this seems to make any difference in the severity of the problem or when it occurs.
Engine was rebuilt by full bore last year and the problem has been there since having the new engine. Engine has good compression and runs well on the low and top ends.
Could rotary valve timing that is slightly off cause something like this?
Last year someone suggested that carb sync might be the culprit. I need to look at that and try syncing using MDs "sound" method. Could this be causing the problem?
I'd like to figure this out because I run it at 3/4 to full throttle most of the time because if you want to slow down to a cruising speed, it just falls on its face. (Really tears through fuel and oil too)