CarlsonMotorsports
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I definitely can tell that my rear axle is bent. I just ordered a new one and I'll try it out this weekend or next week. I'll also touch the clutch drum after a session to see if its too hot to touch. If it is, how do you prevent slippage?
When setting up the carb, specifically turning the A/F screw, is it 1 full rotation out (CC) from all the way closed (in)?
Have you maintenanced your clutch? (Taken apart, cleaned, de-glaze/sand, re-lube and assemble.)
Lowering the engagement rpm would help it from slipping too long on a standing start, but the springs that you mentioned earlier should put you pretty close.
Watch the Briggs video on Youtube for how to adjust your air bleed screw.
Set your idle at the slide first, then turn the air bleed out until the rpm increases. Lower the idle at the slide and repeat.
Just be sure that when you snap the throttle from idle to WOT (wide open throttle) that there is little to no hesitation (ie lean spot.)