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  1. Yamaha YFS200 Blaster ('88-Present)
    I've got a 99 blaster with some mods, and I need help jetting. I'm going to do a top and bottom-end rebuild this winter, and I want to make sure that I don't F it up. It will have a namura piston, wiseco rod, boyenson reeds, fmf procore 2, stock expansion chamber, UNI high flow air filter, TORS...
  2. Yamaha YFZ350 Banshee (1987-Present)
    I just bought a 4 mil 65.50 bore banshee with stock cylinders. It has a 21cc domes, cool head toomy t5s, vforce 1 reeds and a chariot single setup with a keihin pj 34, a 172 main jet and a 62 pilot. It seems to be running very rich. I'm not sure on what jets I need to make this thing run better
  3. Yamaha YFM660R Raptor (2001-2005)
    Bike Bogging/Stuttering 3/4 - Full Throttle [SOLVED] Ok so i have a 2004 Raptor 660 with 102mm bore, +4 stroker crank, Yoshimura Exhaust, K&N filter (air box stock). Jets #25 Pilot 180/185 Main jets. It starts and Idles PERFECT. Couldn't ask for any better however, I had a friend jet it for...
  4. Yamaha YFM350 Raptor/Warrior ('87-Present)
    hey guys, just rebuilt the top end after sitting for almost 2 years. i have a mikuni T36-68a carb and an HMF competition pipe. i'm having issues tuning it. pipe glows red hot, but the plug comes carboned. Under load it seems to bog over 1/4 throttle.. anyone using one of these carbs? what jet...
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