problem with 300ex

[brad_400ex]

I have a 96 300ex with fmf pipe and jetted to 132 main. I have ran with this setup for about 6 months. Its winter now and around 25 to 35 degrees and the 300 doesn't run worth crap. the plug was'nt really fouled out but I put a new one on anyway. ran good for about 5 minutes then died-spuddered out. about 2 weeks ago I put the end cap on and now I took it off. All the discs are black. Do I need to change jets, am I to lean. Thanks for any help

[300exQuadracer]

i dunno but black i`m thinkin is its runnin a little rich somebody correct me if i`m wrong

[43atv]

it sounds a little rich try going down one size. mine is bored with 11.1 piston a cam,fmf exhaust,k@n filter and the air box is drilled.the elavation is about 2000 feet and i have a 130 jet in mine

[jb400exxx]

sounds a little rich go down a size.