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Acceleration Misfire

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Saesneg Shaun:
Hi all, I could do with some advice regarding another problem with the K6. When opening the throttle to accelerate the bike momentarily cuts out. Its much more than a flat spot as for a split second the engine completely dies making the forks dive before picking up and accelerating as normal. It only does this when its up to normal temperature and the hotter the bike gets the worse the problem.

I'm running Boyer electronic ignition with the original coils. New plugs and timing checked. Carbs have been cleaned and balanced, new needle valves fitted and float levels checked. Don't know if its related but the bike is (and always has been) a very poor cold starter.

I'm running out of ideas. Coil breaking down maybe?

Johnwebley:
Does it seem to run lean?

White plugs,

What about R type plugs and resister plugs caps, are you running both?



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Saesneg Shaun:

--- Quote from: Johnwebley on September 04, 2024, 09:25:32 PM ---Does it seem to run lean?

White plugs,

What about R type plugs and resister plugs caps, are you running both?



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--- End quote ---

Doesn't seem to be running lean looking at the plug colour. Air screws are about 1 1/8 out which I set during carb balancing procedure. Running NGK resistor caps and D8EA plugs.
Its usually a pig to start from cold but once started it runs fine until its hot.
I've cleaned and balanced the carbs numerous times now. I replaced the pilot with new genuine honda just in case and replaced all the fuel needle valves because 1 leaked. I previously had issues with wear in the point spindle but am now running electronic so I shouldn't be that either.

Green1:
Are you running an external fuel filter? As that sounds very similar to what my pegaso was doing years ago.

K2-K6:
Try running it with airscrews turned in 1/4 turn from where they are now (you can set them back if no or poor effect) to assess if that makes a difference in starting and running.

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