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spit from carb

Dyna Models

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Old Jul 19th, 2009, 12:06 PM     #1
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spit from carb

I have a mikuni hsr 42 with a force winder seems to spit every once in a while? thought it could be air leak but have gone over all bolts several times and made sure everything was tight. ???
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Old Jul 19th, 2009, 12:22 PM     #2
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Re: spit from carb

Jetting or accelerator pump could be the cause not to mention an intake leak. Tight doesn not necessarily mean no leak.
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Old Jul 19th, 2009, 03:43 PM     #3
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Re: spit from carb

Went thru this on my buds 02 RG. Had to replace intake gaskets.
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Old Jul 19th, 2009, 06:45 PM     #4
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Re: spit from carb

What the other 2 guys said,also make sure your fuel is clean and free of H20.But I would look to the jetting.A #48 slow speed jet will fix you right up if you have a free flowing aircleaner and pipes.Also need to richen up the air/fuel mix approx. 2+3/4 turns from closed.Let us know what you come up with, Dave...
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Old Jul 19th, 2009, 07:09 PM     #5
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Re: spit from carb

A #48 low jet is a bit large, generally you don't need any more than a #46 to set it up properly.
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Old Jul 21st, 2009, 06:57 AM     #6
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Re: spit from carb

A #46 is stock,gotta go up.
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Old Jul 21st, 2009, 04:18 PM     #7
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Re: spit from carb

on my 42 mikuni ... i adjusted the adjustment screw in the plastic top above the metering rod on the accelerator pump.... It had viberated loose and didn't squirt enough gas early enough and made a hesitation in the acceleration of motor... carb is simple enough even in changing jets

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Old Jul 21st, 2009, 05:43 PM     #8
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Re: spit from carb

Glad you found the problem.
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