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sputtering issue fixed...it was the timing


Jedi Knight
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I while back I made a post about how my BN6 would sputter (miss) when holding a steady speed and occasionally backfire during decel, yet run smoothly when accelerating. Yesterday I checked the timing using a timing light (purchased from Moss) that has an advance dial. Turns out the timing was advanced 34 degrees! So with the aid of my timing light, I adjusted the timing to 12 degrees advance (my BN6 has a BJ8 head & cam). Problem solved, now she runs great! I was all set to mess with the carbs, glad I started with the easy fix first.
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THE FIRST STEP TO TUNING THE CARBS is to verify valve clearance, contact breaker gap AND ignition timing.

NO EXCEPTIONS, unless you just like doing the work for nothing...


Jedi Knight
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Thanks for the advice Randy. I actually replaced the points,cond. dist cap, spark plug leads prior to checking timing. Haven't checked the valve clearance yet though. My goal was to troubleshoot/fix a specific problem, which I believe I did. Carbs/mixture seems ok.

John Turney

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"Carburettor", a French verb meaning leave well enough alone.

(Remembered from an old article somewhere in my memory.)
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