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My 1970 is setup like the factory told us, recirculating. When I drain the primary fluid it is pretty black, just like any modern isolated bike. But my motor oil (Brad Penn) is still green. So the green stuff makes it to the primary and gets all the clutch junk in it and turns black, OK that makes sense and again is consistent with newer isolated primaries. But the motor oil in one season stays green, just darker. Makes me wonder how much of the primary oil is really get sucked back into the the oil tank.
My 1970 is setup like the factory told us, recirculating. When I drain the primary fluid it is pretty black, just like any modern isolated bike. But my motor oil (Brad Penn) is still green. So the green stuff makes it to the primary and gets all the clutch junk in it and turns black, OK that makes sense and again is consistent with newer isolated primaries. But the motor oil in one season stays green, just darker. Makes me wonder how much of the primary oil is really get sucked back into the the oil tank.
Takes a very good oil Pump indeed to Suck anything..why they are Gravity Fed..Even the newer bikes with Tank under Transmission.. pull oil pump feed line Off, and tell me it won't make a puddle!!!!
Obviously some oil is Drawn out of primary tho...or it would get Very Full Indeed...Huh?
Just One more thing I quit Worrying over..
Not like Isolated is Not Problematic...Check how many discussions about it!!!Kinda like Carburetors...if as Much attention was paid to tuning the original Ka-Sneeze, as for Instance an S&S or certainly a CV on a Shovel... More folks would Still be Running a "tuned" Butterfly Keihin!!!
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