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Old 08-24-2011, 05:35 PM   #1 (permalink)
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Default Jetting? Please help

Ok i have a 04 ltz400 with the stock carb., i have a White Brothers Aluminum Pro full exhaust with a uni air filter. I hve been runnin this thing for a lng time with stock jets until i finally got tired of hearin the back firing, i had a 155 main put n the carb with air box lid on it bogs dwn really bad witch i expected but no back firing when the lid off their is no bogging but my back firing comes back? Also had a 13T sprocket put on it. Do i need to change the pilot to? I ride from 410ft-550ft. Thanks for all and any help Matt
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Old 08-24-2011, 05:50 PM   #2 (permalink)
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search the stickied jetting thread
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Old 08-24-2011, 05:54 PM   #3 (permalink)
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i run a 155 main, 25 pilot, air screw 3.5 turns, needle 3rd clip. with full system you need to get jet kit that has new needle. your air screw might not be drilled out either.
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Old 08-24-2011, 06:19 PM   #4 (permalink)
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Quote:
Originally Posted by Z400-007 View Post
i run a 155 main, 25 pilot, air screw 3.5 turns, needle 3rd clip. with full system you need to get jet kit that has new needle. your air screw might not be drilled out either.
theres not an "air screw" on the stock bsr carb...there is however a fuel screw
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Old 08-24-2011, 06:24 PM   #5 (permalink)
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Check the jetting database sticky.
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Old 08-24-2011, 08:10 PM   #6 (permalink)
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Check the jetting database sticky.
Jetting Database
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Old 08-24-2011, 08:45 PM   #7 (permalink)
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Old 08-25-2011, 10:01 AM   #8 (permalink)
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Thanks guys for the help(: its much appreciated.
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