Carburetor tuning, velocity stacks and dump out exhaust set tach to 1200 book suggests 1000 rpm as it idles it starts to back fire fuel mixture screws are out 2.5 turns
Carburetor tuning, velocity stacks and dump out exhaust set tach to 1200 book suggests 1000 rpm as it idles it starts to back fire fuel mixture screws are out 2.5 turns