having problems with my 1200 not running smoth in the lower rpm range from 11oo rpm to 4000 rpm it seams to be real boggy and pings was wondering if the timimg is off or carbs not guite right ,just had my bike all tuned up at mas cycle in fargo nd. Not real happy with the shop manly the owner his word and ethicks suck {another story} my bike ran good for about 1200 miles and it started to boog down any suggestions would be apreciateed