I watched two brother [ BURT BROTHERS ] run only a header pipes for the pass 5 years = they won WALLY'S, KING OF THE TRACK, NAPA DAYS, NIGHT OF FIRE, TRACK CHAMPIONSHIPS and many rounds without a muffler or collector ! We dyno the TURTLE HONDAMATIC with no collector and with the collector and a small gain was had with a collector. My simple fix = take off collector , re-jet carbs , save weight and make loud noise.
FRANK: RULES TO LIVE WITH, You and ME saw IDBA, AHDRA, PRO-STAR and AMA PRO-STAR lose many racers and go away ........... could this be NHRA telling bikes the name means NATIONAL HOT ROD ASSES with no BIKES in that name. Yet they let you race a bike to 120MPH in 1320' wearing a pair of JEANS ?? I have always wore leathers from day one, even at 77mph or 129mph and you go down I would max out my Medicare [ WITH ME 30 years on FIRE DEPT. I HAVE SEEN MANY MOTORCYCLE WRECKS ] them folks in bad shape or DEAD with no helmet , gloves, leather coat, boots and DRUNK.
POPS BK911 LIGHTER and LOUDER in 2014