Hey guys, I'm looking for a little help. I have an 07 400EX that I am getting back together after sitting for a few years. The bike was rebuilt before it was parked and only had 1 ride on it. I am in the process of just cleaning it up and getting her running right. I replaced the carb with a new one and have read a ton of threads on where to start on the settings but I can't seem to get it. It has a 426 kit with stg 2 hot cam, stock airbox with moose foam filter, 42 pilot/ 175 main/ 2 1/8 turns on the A/F screw. This thing will fire right up and idle just fine, and blips the throttle but if you give it too much throttle too quick it will just die (you can play with the throttle to try to get the revs up but it misses like crazy and will eventually die). I am heading to the shop after work to get a few main jets to try but any thoughts as to which way to go from the 175. I cant seem to find a definitive answer but I am thinking too rich and needing a smaller jet?? I cant get it out to ride it to fine tune it and do a plug chop.

Possibly related= the choke lever seems to have no impact on or off and it will only run (idle) with the fuel on reserve. I understand the petcock would seem clogged, but I had the tank off draining the fresh gas and it runs fuel in both positions and stops at "off". That has me stumped.

Thanks for looking and any help you can provide.