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Old May 22nd, 2014, 04:59 AM   #10
csmith12
The Corner Whisperer
 
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Name: Chris (aka Reactor)
Location: Northern KY
Join Date: May 2011

Motorcycle(s): 2010 250 (track), 1992 250, 2006 R6 (street/track), 2008 R6 (track)

Posts: Too much.
MOTY 2015, MOTM - Nov '12, Nov '13
I have done it before. On some bikes it made a small difference, others not so much. It was more about the carbs and getting them to react well to the initial shot of gas to not lurch the bike forward.

Shimming is pretty easy and completely reversible if you don't like it. Start there, if that don't work, time to look at the carbs/airbox. Specifically check the sync of the carbs.
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