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yes, Did it run ??? is the piston in right ???Anyone have a suggestion as to why a 2-stroke crank seal could be blown right out of its bore with enough force to bend the seal keepers? I don't want to simply replace the seal and have it repeat the same problem. Can this happen from a backfire? POW.
It ran, but it never has run right. I never pulled the top end off this bike because it has the highest compression of any 2-stroke I own.yes, Did it run ??? is the piston in right ???
if there is a window in the skirt it should go toward the carb if i remember right. if it has reed valves. pop off exhaust and look at your piston. maybe its broke too. looks like exhaust in the crankcase.It ran, but it never has run right. I never pulled the top end off this bike because it has the highest compression of any 2-stroke I own.
I have been chasing carb issues because the carb that came with it was a mess inside. I rode it with the carb off my 400 but again, it isn't running right. I recently put a smaller carb from a running 250 parts bike. The timing is spot on, and that's no easy task on these old girls. With the 250 carb it started and ran for about 30 seconds and drowned out in a cloud of smoke. Hence the reason I went for the right side crank seal. Bingo! Blown right out of its seat. It has backfired during my many attempts to get this thing running right. The fact that it bent the keepers has me concerned. Those little brackets are pretty robust.
Will it even run with a piston in backwards?
The residue behind that side cover was black as black can be. It does have a reed valve. I will pull the intake and the exhaust to verify piston orientation. The exhaust pipe will have to be burned clean anyhow since it has been completely fouled with oil.if there is a window in the skirt it should go toward the carb if i remember right. if it has reed valves. pop off exhaust and look at your piston. maybe its broke too. looks like exhaust in the crankcase.
The reeds look fine, although they are aftermarket Boysen's which I've never used before. There are backing plates that limit the reeds from blowing back too far.also check the reeds if it blew that bad the reeds are probably fuct too.
dial indicator for radial and axil play. visually by removing cylinder, or splitting the case. maybe there is too much endplay(axil).The reeds look fine, although they are aftermarket Boysen's which I've never used before. There are backing plates that limit the reeds from blowing back too far.
The piston orientation is correct with intake ports toward the carb.
The cyl bore looks ok to me as seen thru the exhaust port. It actually shows some cross hatching, so maybe someone has been in there.
Is it possible I have a "twisted" crankshaft? I believe they are pressed together. Might explain why I cannot seem to make this thing run properly regardless of using 3 different carbs and knowing the timing is set perfectly using a dial indicator and a buzz box.
How the heck would I checked for a twisted crank?
Well I'm open to popping the top of this thing since I have the gaskets in hand, but I really really don't want to split cases again. Just did that in my Tooth Fairy post with my 400.dial indicator for radial and axil play. visually by removing cylinder, or splitting the case. maybe there is too much endplay(axil).
if it brings you down, walk away come back fresh another day.Well I'm open to popping the top of this thing since I have the gaskets in hand, but I really really don't want to split cases again. Just did that in my Tooth Fairy post with my 400.
Oh well. It's a hobby, right? Can't let this stuff bring me down. I'll let you know how it turns out.
Best advice ever..!if it brings you down, walk away come back fresh another day.
it's cocktail hour !!!