I have some issues with my hobbit after opening the polini's exhaust port to match the MLM People's pipe. I had a good run after I put everything back together, the bike wassweat flying no sweat. After letting the bike sit for a few hours it started doing what it is in the video. I changed my head, base, and exhaust gaskets, along with the crank seals. Sprayed some starter fluid around all the mating surfaces and didn't find any leaks.
I gapped my points to .385mm, thats what I've been running and it works great with my setup. I'm running a 18mm mikuni with a 80 jet. It was 90 before. I just put in a new plug (B7HS) after the last one fouled up when I fixed some air leaks. Cleaned my piston and changed the ring.
I can get up to 15mph WOT but there is a lot of pooping and backfiring going on and refuses to fully variate.
any ideas whats going on here? Ran perfect before and a little while after opening the exhaust port.