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Zippy at low RPM's then cuts out at about 4000

  • Thread starter Thread starter Anonymous
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Anonymous

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I have tryed cleaning the carbs and even tried a different set. The results were the same where it starts good and is running good on low rpms and when it gets to about 4000 it stalls there and will backfire off and on. I am trying this with the air box off as the filter needs replacing. Any suggestions?
 
Re: Zippy at low RPM's then cuts out at about 4000

The bike is NOT going to run correctly without the airbox and filter.
The bike will be running far too lean without them. If youre lucky, you havent burned a valve or toasted a piston. I will never understand why some feel they can remove parts from the engine and expect it to still run normally. If they were not needed, they would not be there in the first place.

Earl


Albrecht said:
I have tryed cleaning the carbs and even tried a different set. The results were the same where it starts good and is running good on low rpms and when it gets to about 4000 it stalls there and will backfire off and on. I am trying this with the air box off as the filter needs replacing. Any suggestions?
Click to expand...
 
Ditto. If your bike hasn't been rejetted with a stage-3 kit it NEEDS the airbox to be on to run correctly.
Take it off or remove the filter and it just won't run right and you risk blowing eomponents in your engine.

Dm of mD
 
I had a very similar problem. I couldn't do over forty so after buying a fifty dollar airfilter b/c i didn't get one with the bike it still didn't run right.
I finally got it right when i replaced the coils.

Neal
78 gs 550

78 500 crx honda

73 J-4000
 
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