Leaderboard

2 stokes need to back pressure to seal the incoming charge. whacking in the fuel via choke is just masking it. you need to carry out a plug chop, to ascertain the correct mixture and have a load of mains and pilot jets to change fuel delivery.

I can't help you with the diagnostics, but, if you've bought it to 'restore' it. Then you might as well change the exhaust for the right one, you're going to have to do it at some point... ALWAYS provide photos/videos!