i just put a 750 motor,w/good kehein twins carbs on stock exhaust (because it's in a 1983 js shell)...i leaned it out, cause' it's gett'N way to much gas, i tried br8es plugs and there wet, black, tons of fuel all over em',then went to br7es, same ****, wet, black,( back to more leaning it out)..ok, w/that said, now does any1 know if ok to put br6es in ...or will they burn a hole through the pistons...looks like it's my only hope...can ya help my sorry *** out..

 

Too hot. You gotta go with the 8's. Crank it over with your fingers in the spark plug holes to clean the cylinders out. There might be alot of excess oil in the engine if you just did a rebuild.

 

when i floor it, it just over fuels itself (w/new plugs br8es,7's, and 6s)does keihen make smaller jets so i canlessin' theamount offuelcoming outta the twin 38's keihens carbs. it's in a js 1983 kaw stand up, this 750ty i talk about, what i need is a big pipe, but can't, no more room....bummer'