I HAVE A 1999 SHE SHE WITH A +4 DEGREE KEY, BOYESEN CARBON FIBER REEDS, 1/2" REED BLOCK SPACERS, K & N AIR FILTER, NO AIR BOX, DYNA JET KIT, STOCK BORE AND NO PORTING, FMF SST PIPES AND SILENCERS(POWER CORE), STOCK CARBS. I DO A LOT OF WOODS RIDING USUALLY IN 2-4 GEAR THE MOST. WHAT SHOULD I DO FOR THE NEXT MOD OF THE THESE 3, OR BEST COMBO OF 2 OF THE 3, BOYESEN RAD VALVE, SHAVED HEAD .030, LIGHTNED FLYWHEEL. THANKS
JESSE