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Cb750 misfire

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Trigger:

--- Quote from: 750rideruk on February 22, 2015, 01:59:48 PM ---air screws 1 1/2 turns out.
Carbs partially  stripped cleaned rebuilt and balanced

--- End quote ---

The bogging down could be that your air screws are too far out. Try them at 1 to 1 1/8. Have you checked that the air screws are not blocked ? If popping from the pipes, are you sure they are sealed up. I take it that you are running std pipes ?

750rideruk:
Actually is spitting back through airbox, Any thoughts?

Trigger:

--- Quote from: Trigger on February 22, 2015, 02:29:19 PM ---
--- Quote from: 750rideruk on February 22, 2015, 01:59:48 PM ---air screws 1 1/2 turns out.
Carbs partially  stripped cleaned rebuilt and balanced

--- End quote ---

The bogging down could be that your air screws are too far out. Try them at 1 to 1 1/8. Have you checked that the air screws are not blocked ? If popping from the pipes, are you sure they are sealed up. I take it that you are running std pipes ?

--- End quote ---

Did i not ask that in the first place ? Check all manifold bands are tight, no air leaks and no cracks in the air box. What 750 are we on about ?

750rideruk:
Its a K1 with std pipes.
Thanks for the assistance trigger

Trigger:

--- Quote from: 750rideruk on February 22, 2015, 03:38:19 PM ---Its a K1 with std pipes.
Thanks for the assistance trigger

--- End quote ---

Sorry but, we had a member asking about carbs a couple of weeks ago and he forgot to mention that he was running a big bore kit. It is going to be a air leak somewhere around the air box carb area.

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