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    • Bryan Bosch

      JUST IN!   04/24/2018

      HOW TO: 4-STROKE PISTON REPLACEMENT DONE RIGHT!

clintyfz45004

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About clintyfz45004

  • Rank
    TT Newbie

Profile Information

  • Location
    Michigan
  • Interests
    modify (slowy) my yfz
  1. Yamaha

    if you realy want to uncork your stock power with no mods ie:pipe and so on, you should look into stepping youre accelerater pump jet which is located on the bottom of yourfloat bowl and uping the size from say a 50 to and 80 or 90, another good one is to up youre pilot from the 42 to a 50 or and in conjunction replace youre main air which is located in throat of carb with a 95 or 100.probably a 95 in most cases dependent on elevation of youre riding area, the accel pump jet really helps the transfer from low to top end power and also helps eliminate bog... dont go with carb divider mods they are a joke the fcr carb is the best on the market and can be made even better with no b.s. mods
  2. Yamaha

    I plan on getting the big bore kit from athena because of price but how big of a difference does it make and anyone know the added horse power??