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03 cat 400i auto jetting

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Old Apr 16, 2004 | 10:10 AM
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Trailblazer
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Default 03 cat 400i auto jetting

Hi Guys
Did the muffler mod, put in a K&N filter. plug is black now and bike is not running good, some times feels like theres no power, and after going at top speed let off the gas will back fire numerous times. Like I said only happens once and a while
The carb has a 150, picked up a 145. put the 145 in last night, turned the air fuel screw out 1/2 turn. the proper setting is two turns out? was this proper seems to run good but lacking top end?


AM I GOING IN THE RIGHT DIRECTION?
 
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