09 Buell Blast running issue

[jetlee]

A leaky bowl gasket and torn paper gasket will not cause your issues; been there, done that.

Did you make sure the needle jet was installed correctly?

Have you followed the FSM to check the TPS?

How old is your gas? Old gas or water contamination will cause this.

The LED on the cam sensor (ignition module) doesn't light every single time. Ideally it should, but the on/off signal is so fast, it doesn't always light. You could try using a real timing light; connect it up (battery + & -, and plug wire) and just point it at something. If that light is flashing steady, you know the plug is firing.

If you have a measuring caliper, measure the diameter of the hole in the bottom of the slide. Not the needle hole, the one behind it, the Vacuum Port. If it has been drilled out to 1/8" or larger, you're flooding the motor and need a new slide. It's a common modification on V-Twins, but gives too much fuel for the Blast single.

FSM can be found here:
https://buellmods.com

Carb parts can be found here:
https://cv-performance.com/

Needle Jet orientation:


Vacuum port - A, should be smaller than 1/8":