Originally Posted by Adv Grifter
I forgot ... are you running the stock BST40 Carb? If so ... PM Derek.
My old Carb did the same ... slide/Jet needle was worn out (apparently).
I just bought a whole new Carb. This might be it, not certain, but when the slide and Jet needle begin to wear you can get off idle stumble and stalling going down to idle. YMMV.
Just a thought.
Forgot about the whole needle wear. I do have an aftermarket needle (PC kit); I will have to check the tube it runs in. I think Derek has mentioned not liking aftermarket needles due to wearing that tube.