intermittent

1999 TL1000R, 35k miles, ran great when I bought it earlier this year in Feb. My problem: It sits for a week or 2, then I go to ride. It will start fine, but then it warms up & stops running, won't start again. I had it to the shop, they replaced the fouled plug, ran excellent! I bring my baby...

ok so heres the lo down on my bike. 2001 has almost 4k miles on it. bought it about 2 months ago with 2.2k miles on it :devious so ive put yosh RS3 cans on it, air box mod, and a TRE which i took off and feels about the same, maybe a little better without it, so i think the TRE is bad... but...