Has anyone succeeded in keeping their strom in sync for longer than 5 MINUTES! Whether I do it or the shop does it, once around the block and it's back to square one. Valve clearances are correct and their are no vacuum or exhaust leaks anywhere I can find. On my homemade Uni-syn ( plastic pipe and tranny fluid) one cylinder always registers 3 to 4 inches of tranny fluid above the other cylinder, yet when I turn the adjustment screw to even the levels up they only stay in sync for several minutes and then they're off again by the same amount. I adjust it at idle and 2,500rpm, even put a dab of locktite on the screw so she won't move. At the times that it did stay in sync for a while, I could definitely tell the difference in vibration, particularly when accelerating or using a lot of throttle going up a long hill. The engine felt electric, almost as if the engine got smoother the deeper I went into the throttle. It really has a way of making me wish it would run this way all of the time. My old dual-weber bug was never this hard to get evened up.

Dan