Long time lurker here. Recently came out of the mOped closet! As the title says 3rd. build - E50 72cc Airsal - CM (treats) Unstuffed Crank, Mild porting tapering to avoid thin areas next to case joints, Mikuni VM18 (my personal fav at this build level), treats jammer clutch. Everything went together so smoothly that I thought I had overlooked something.
The clutch starter plate needed to be an extra .5mm proud. There was no additional shimming down possible, plus extremely thin shims next to a cir-clip worry me, the only other option was to mill the gear, (no thanks). So I created a .5mm that perfectly fit under the starter plate. Blamo, works so well and no ring a ding from the clutch bell. Treats should sell shims for under the starter plate for their jammer clutch. This works well and would not be possible for a stock clutch.
Next build is the Gila. I need an E50 case with bearings on each side of the drive gear for this one.