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Been fighting this problem for a while. I have took apart and cleaned the s/s switch. I've ohmed it back to ebox it seems fine. I just replaced my cdi box with an 61x. Here's what odd guys. It will not start unless lanyard is pulled. But will not shut off from lanyard nor stop switch. What is it...

I'm thinking its a 701 piston .5 over. I'm just going to mic it out take my ring clearance and subtract and go from there. She was an old race ski.

Alright guys long story short I orders the standard bore size piston set and not it! The old pistons say 0.50mm and 635PS below it. I know now that is bored over. Is it bored .50mm over because it was a HUGE difference. Its a 90 superjet 6m6 motor (case). Need help want to be back on the...

Just to let you guys know SBT is screwed up. They have screwed me over and now sitting with a rebuild kit minus one piston. I call and they wanted me to pay the 2 day shipping. After a few words it was going to be shipped for free, 2 day shipping. Well i stressed i wanted it before 4th july...

I got aggravated enough to pull the engine out and go over everything. With better inspection of the rings to the piston (looking through the exhaust port). Then turning over slowly by hand. The rear cylinder seemed to allow air to pass between the rings a lot faster then the front. If that...

Bump anyone think it could be electrical

Ran compression test today 115 front cylinder 130 rear. Pulled the head off and cylinder walls look good pistons look fairly new.

I have a 1990 superjet 650. I got it over the winter from an older guy who hadit, not ran it for 2 years. It has a Factory B pipe, 44mm mikuni, westcoast head, aftermarket prop skid plate and a intake scoop style grate, and he told me it was bored over (dont know really believe him you never...