August 9, 201115 yr When the bike is running the ATF comes out the primary filler plug (it's vented). I can't figure out how the primary is getting pressurized, I thought that if the crank seals were bad they would suck, not blow. Thoughts?
August 9, 201115 yr Somewhat recent experience with the Sherco's and the fuels suggeste this could go both ways, so seals are suspect I would think!
August 9, 201115 yr Author Somewhat recent experience with the Sherco's and the fuels suggeste this could go both ways, so seals are suspect I would think! Yeah, I thought that might be the case. Hope a local place has those size seals.
August 10, 201115 yr Piston goes down = positive pressure in crankcase. Piston goes up = negative pressure in crankcase. Works both ways Dave. P.S. It will pressurise the drive side because it is easier to push air from the crankcase through the seal during a downward stroke of the piston than it is to suck ATF back into the crankcase through the seal during an upward stroke. Edited August 10, 201115 yr by TooFastTim
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