Hey guys you've been really helpful so far. So I've moved on from electronics now I'm on engine. I have a 77 xs650 with a 72xs1 engine. The bike idles nicely and shifts into gear perfectly fine. But as soon as I start to drive it feels sluggish and in first I get a puff of smoke. Only got it up to 3rd but always feels very sluggish. Where should I start? The guy who owned it before me said he did a carb clean and changed parts. He also put a new petcock and fuel line. Sparks look new and there is gas. Basically I'm asking where should I start? And what you think might be going on.
Thanks
Thanks