Just run regular unleaded unless you have high compression pistons otherwise it doesn’t make much difference unless you are racing and need the extra .01 sec

When you adjusted your floats did they still move freely? I have read that some people after setting them to 13mm (pre assembly) that the tab was bent so much the float did not move. You have to have some movement to the floats or that's a bad thing..

I would also pull the plug out and check to make sure its the correct one.

 

When I moved the tabs, the floats still moved freely. I'll double check on the plug.

 

OK, Now I REALLY need HELP!!!!!! I took the tops of the carbs off just to make sure the needles were pushed in all of the way. So then I took them out to make sure nothing was gunked up everything was great. Then I tried to start it, now it won't start. Gas is still getting to the carbs, but it won't fire. The starter will just keep going. Every Once and while it'll make a quick noise, as if it was going to start, but then quits. Some one anyone HELP!!!!!!!!!!!!!