[pete]

This dam little @#$&*% still tosses it chain...
looks like I will have to move the swing arm pivot up
about 40mm to cure the issue... Which is in fact quite easy
to do with the way the arm is mounted...

But first I'm going to try a trick we used on the speedway TQ midget
years ago.... A nylon disc bolted on each side of the sprocket that sits
25mm higher... to guide the chain onto the sprocket... In 4 years of
raceing I never tossed a chain after putting them on...

But other than the chain... it's not a bad little bike for the $...