Yup, i had the same issue. Those pops can go a long way to making shit of a CF can too!Often, the doughnut gasket between the stub pipe and header on the rear cylinder is the culprit. When the engine is cold you may be able to feel exhaust gases escaping through that junction.
That same gasket is used not only on TLs, but also on SVs and DLs. Therefore, it is surprising that none of the shops in my area keep them on hand. They are always "special order" items. :coocoo Anyway, that's likely the part you need.
they also made the police around london very twitchy when i was riding my backfiring tl down there to the world superbikes at brands hatchYup, i had the same issue. Those pops can go a long way to making shit of a CF can too!