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  1. Full throttle bog

    Engine/EFI/Drivetrain
    Hey guys. I bought an 08 Kfx450r and when I took it to the trails, it was bogging at full Throttle. As soon as I drop to 3/4 of the way, it speeds back up, then full throttle Boggs again. When I got home I ordered a flex fuel controller programmer and also cleaned the injector, changed...
  2. Looking for Some Advice-Beginner ATVer

    General Discussion
    I just picked up an 08 KFX450r. Bone stock, one owner, and super clean. I swapped all the fluids and filters and put a K&N intake on it: 63-1124 - K&N Intake Kits, Performance Intake Kit I wanted to put a slip on pipe on it, but don't want to get crazy with jetting, programming, $$$$$. I am...
  3. fmf programer setting?

    Engine/EFI/Drivetrain
    I have an fmf power programmer, fmf factory 4.1 and a velocity intake. Does anyone have a similar set up and could you tell me what your settings are for your programmer?
  4. New to Kfx, EFI Question

    Engine/EFI/Drivetrain
    I'm looking at trading my 400ex for a Kfx450r this weekend. I've always dealt with carbs on my other 450's/400's so I was curious what the most cost effective way to go is for doing an exhaust. It already has a K&N so that's covered. What I'm not too sure on is a programmer for the EFI. I know...
  5. DMC Programmer settings w/ FCI, Dual exhaust

    Member Introductions
    Hi all, I'm new to this forum, the KFX 450 and tuning ATVs. I recently bought a used '08 KFX with a DMC dual exhaust system and programmer installed, and stock box/no lid with K&N filter. I just added a FCI Intake w/ box and don't know where to begin with the DMC settings. Programmer had...
  6. EFI programmer settings...

    Engine/EFI/Drivetrain
    So I bought a Two Brother's EFI controller (from the forum!) and I've been playing with the settings... My current setup on my KFX450 is: K&N intake, no airbox lid stock motor Stock pipe (and I'm really close to sea level... Michigan) My current settings for the programmer are: cruise: +1...
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