kz750 Twin Engine Lag

  • photobrandon
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kz750 Twin Engine Lag

05 Jul 2014 17:33
#638980
So I just finished replacing all of my valves shims so they are to spec. But now, I'm having an interesting issue with my right exhaust popping and the bike lagging/stuttering when I accelerate. I adjustment to the right carb pilot screw seemed to solve the popping issue at idle, but I'm still having lag issues when riding.

Also, stupid noob questoin. I was going to take of the crabs to make sure the butterfly's were still in sync, but I can't get the damn things off.

I'm running pod filters with a shorty exhaust and the bike was running ok prior to shimming.

Thanks all

Any ideas?
-B

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  • bountyhunter
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Re: kz750 Twin Engine Lag

05 Jul 2014 17:37
#638981
The symptoms indicate it's running lean. With straight pipes and pods, I have no idea what the carb setup should be.

What pilot/main jets are you running and what is the setting on the needle slot?
1979 KZ-750 Twin

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Re: kz750 Twin Engine Lag

05 Jul 2014 17:39
#638982
If the problem suddenly appeared, it could be some dirt or crud drained down and blocked a jet. Are you running inline filters?
1979 KZ-750 Twin

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Re: kz750 Twin Engine Lag

05 Jul 2014 18:02
#638983
How can I check what the pilot main jets? Sorry never worked on carbs before. Yes, running inline filters.
-B

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Re: kz750 Twin Engine Lag

05 Jul 2014 22:13
#638999
If it has the stock carbs, the pilots and mains are in the carburetor bowls. They can be removed without taking off the carbs.
1979 KZ-750 Twin

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