I've managed to build a Super Rat from scratch meaning I bought the bottom end and everything else individually and successfully assembled. Now after achieving 49.5 the clutch can slip nasty if i don't ease into high RPM's. Smelling like burnt breaks heh. Anyhoo the rat bottom is stock from what I know. The motor head is a 6 cc with a solid copper gasket, also 26 tooth, a small reed valve with the champion carb with a #88 jet which BTW the plug never seems to look rich. I'm running Opti 2 @ 3 oz per gal. Oh and the jug is worked with 3rd reed port, transfers cleaned, ported intake and exhaust with a windowed piston that I cut and the original piston rings from that piston. I got a reading of 190 PSI from this build. She's running soooo good that the guys who race them by my way won't run one with me, they say I ain't ready, I just wanted to see how fast mine was compared to theirs. So this is my problem, the clutch slips if I don't ease off when the pipe kicks in. If I just cruise normal she's good. Can you see anything wrong with my set up? I've already looked at your clutch instructions so I'm just wondering If I can get away with loosening or tightening the butterfly. I'm so close to getting it right I love it thanks in advance. Update: loosened the clutch cable and went for a ride and seems to not slip but still smells like it so I'm gonna change the pads since they may be bad.