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Old May 14th, 2010, 12:05 PM   #40
headshrink
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Name: Bob
Location: CA
Join Date: Dec 2008

Motorcycle(s): '08 Ninja 250r, '14 CBR500r

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Quote:
Originally Posted by kkim View Post
sounds like it might still be a bit too lean.

you can richen up the mixture screws a half a turn to see if that helps the stutter.

as an experiment, try reinstalling the stock filter and see if that changes anything.

as a last resort, I'd try 98 mains to see if that will richen it enough to get rid of the stutter. Keep in mind that all the work to jet the needles and mixture screw settings will change and will need to be redone.

Also, change only one thing at a time and test between each change to note the difference each one makes to the power delivery.
I do have the stock filter, no snorkel though.
Since I'm working on the pilot circuit (proper term or is it idle circuit?), you think I should try the FP pilot jets supplied with the kit prior to moving to a 98 main?
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