What engine do you have? 790 or 865? Also, you will get quite a number of different mains and pilots mentioned. What works for you is what matters. One thing. If your performance increases as you increase jet size don't stop changing them when you think you have reached that magic seat of the pants feeling. Verify with a dino, A/F ratio tester, or acceleration test (full throttle to above 5000/6000 rpm in 4th then back off throttle a bit. If bike speed picks up, you are still too lean on the mains).

My 790 runs 135 mains, TBS needles, 42 pilots, 3 turns on idle screws. Short TORS (straight throughs) and snorkels (3) removed. Top filter cover opened up to filter size. Runs really well, but I will be tinkering some more with 45 pilots and Thruxton needles and smaller mains but too lazy now. Bike runs too well.

Getting tired of posting these numbers..... You might want to check Dinqua's website in the Tech vault under CARBS.


12 Rocket Roadster
03 Bonneville America
69 BSA Firebird Scrambler
73 Yamaha TX 750