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engine

  1. General Discussion
    Hey everyone been looking around but can't find answer to my question .gonna do my waterpump seals and my screens this weekend and it doesn't specify anywhere for the scavenge cover and feed cover that the screens r behind do they get installed with silicone rtv or do they not use any gasket...
  2. Engine/EFI/Drivetrain
    I have a full hmf competition series and a lexx fuel controller on my kfx.i think It might need some help with the tuning because it has problems starting. It also has a very touchy throttle right know to. for example when you are coming out of a turn and your holding the throttle steady it...
  3. Engine/EFI/Drivetrain
    I am only 16 and i am changing the radiator due to damage (it now leaks) and i am not to sure how to drain the coolant.Is there a drain plug or do i have to remove one of the radiator hoses for the coolant to drain?
  4. General Discussion
    I have noticed an oil leak on the bottom case of the engine in the seam. Its leaking just behind the oil plug in the seam of the case. Any advice on how to fix this and will it allow any water in the engine oil? Thanks
  5. Engine/EFI/Drivetrain
    Hey guys I just bought my first KFX450R and am new to this forum. I bought it used off craigslist and is an '08. It has a FMF pc4 slip on, outerwears airbox lid and lexx fuel controller. The guy I bought it from said he didn't know much about it. Said he thought the motor was all original and...
  6. For Sale / Wanted
    Well I hate to do this but my daily driver chewed up a bearing so I need to sell this motor to rebuild my engine for my s13. It's an 09' with around 100hrs on it, changed oil every 10hrs of riding, ran perfect, no smoke, pulled hard. Will include harness and also include nice Yoshimura full...
  7. For Sale / Wanted
    2009 kfx 450r part out sale! Reposted in another thread. Check it out
  8. Engine/EFI/Drivetrain
    Ok guys I'm new to the Kfx and the world of fuel injection, and I'm lost on what to do with my build soo any advice will be greatly appreciated. I know what I want to do just don't know how to go about it... the motor is disassembled and I'm stuck at deciding on parts. I've already port and...
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