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big gun evo r

  1. raptor 250 jetting HELP

    Raptor 250 General
    hi all im currently running my 250 with a big gun evo r full system exhaust, gytr air filter and adaptor plate with a standard air box with lid on , I have gytr jets installed as per the instructions with the jets, (what Yamaha recommend) and the fuel screw out 2 turns and when the engine is...
  2. 3 MOD questions

    Raptor 700 Mods
    I just put my big gun evo r duals on and I have the FI controller and K&N I notice when I would hit the gas quick it cuts out at first and when I start it it has trouble idling at first any ideas? This is on a 2007 700 raptor