ToothDoc
11-30-2003, 08:53 PM
O.K. Got new 400ex and broke in a few months ago.Ran great.then place K-n-N air filter and e-series White Brothers exhaust.After a few rides could not get to start so checked plug and it was black and dry.Which I thought it would be gray or white due to being to lean.So placed new plug and after a few rides the same thing happened again .It seems to run fine ,a few backfires here and there,but no real problems except for starting .It seems to run fine after I clean the plug.Can someone help,I'm sure this is the first time this has happened.white Brothers states this pipe is for stock jet settings and no rejetting needs to be done.