Sachs Prima, got it cheap and pieced it together with a lot of spare SWOOPS parts after we moved out of our last warehouse. It's since been sold, but a very fun bike without question. Double nutted 3 pad clutch with center spline set-screwed to the crank, 505/1a casematched unported athena 80 reed kit. Stock fender cut & mounted up to the the tripletree, trail tires, 13x42 gearing. 48mph but unreal low-end.