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berm ripper
09-27-2004, 09:59 AM
just had motor work done on 400-ex . did not bore. went with pistion . hot cam#2. port &polished. i will be going with a curtis sprarks x6 pipe. would like to run with air box lid off . have put on a after market cdi boxwith 1200rpm + 5 degree curve. i have a 152 main and a 38 pilot in now. some one said i should go with a 152 main and a 42 pilot. is this correct or should i go with more on main and pilot? also should air screw at 2 turns ? thanks .

cals400ex
09-27-2004, 11:28 AM
it is somewhat hard to understand what your saying but i would try a 160 keihin mainjet and a 42 pilot jet at first. you can mess with it from there.