RSVR GEN 2 misfire

Jun 2017
Hi All,

I’ve got a 2005 gen 2 RSV which runs like a champ for about an hour then it starts to misfire, pops, bangs and feels like it’s really struggling to run. I’ve changed the plugs, oil, oil filter, air filter, stator, rectifier. Be checked the tubes on the throttle body and they are fine too? Anybody any ideas?