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Sawicky
04-11-2003, 05:57 AM
I installed a 158 main and a 42 pilot jet on my 2003 400ex last nite. Did I choose the correct jets and do I need to do anything else to my air/fuel screws...
Doibugu2
04-11-2003, 06:09 AM
Why did you change the main? Did you take off the airbox or added an exhaust? Got to give us more info.
04-11-2003, 06:10 AM
why did you change the jetting??
Sawicky
04-11-2003, 06:52 AM
I added a WB E series slip-on and wanted to gain more out of it. People told me to rejet. What size jets did all of you guys use?I rejetted last night and took ir for a quik ride. Felt a little difference.
Sawicky
04-11-2003, 07:15 PM
Do I need to move the clip down a few notches. Where is the clip at and what the hell is it?
Moto92
04-11-2003, 07:54 PM
That much on a main might be too much for a slip on unless your running no airbox lid or an aftermarket filter also.
I have a T4, UNI filter, no lid and run a 155
cals400ex
04-11-2003, 08:10 PM
main jet is probally too big. i would try a 152. pilot jet sounds pretty good. i am running a 45 pilot right now and it is a little rich. i had a 42 but it did not seem to do much. however, when i took it out and put a bigger one in, i found that it was gumed up so i am going back and trying the 42. does your bike start without out the choke with that new pilot jet in?
AAAirbooorn
04-12-2003, 02:16 AM
You definitely need a service manual. theres a guy on here that sells it on cd for $10. put out a feeler.