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  1. Broken crank, rod, or piston?

    Engine/EFI/Drivetrain
    Went riding this weekend and had a blast. Did a drag race back to the trailer then cut my quad off. It wouldnt start back up. Tried to pull start it and the wheels wouldnt spin when i let out on the clutch. When i got back to the trailer i pushed the start button and it sounded like something...
  2. The $1,300 running 08 motor build

    Engine/EFI/Drivetrain
    Ok so basically one of my friends found a beat up but running 08 kfx 450. The guy wanted 1800 but took 1300. Hands down the most ratted out "newer" quad ive seen. Anyways it was burning oil and needed the engine torn down. After getting into it, it needs: Cams (current cams are well...
  3. Top end rebuild help

    Engine/EFI/Drivetrain
    I'm looking to rebuild my top end and I would like to start running 100 octane fuel. What compression piston and cams should I be using? I'm unsure if I would like to do a port and polish. Im not looking to lose power anywere if possible. Any help is appreciated, thanks!
  4. 100 octane build?

    Engine/EFI/Drivetrain
    So it turns out that I have easy access to 100 octane fuel and I'm wondering if it is worth running through my quad. At $5 a gallon it's a very happy medium between 91 and 110. I have no idea what I would need to do to compensate for the octane increase other than a higher compression piston. I...
  5. Rebuild suggestions

    Engine/EFI/Drivetrain
    I'm looking to rebuild the top end on my 08 and could use some help. Should I be buying a rebuild kit or aquire parts separately? I hear that oem gaskets is the only way to go. I can only access 91 octane fuel not sure if I could bump it up a few points with some additive. Would a 12.8:1 piston...
  6. Couple Top End Questions

    Engine/EFI/Drivetrain
    Ok I'm about to buy a JE 12.8:1 piston and would like to know what I need to buy or do. I just ordered Stage 2 hot cams and am curious about a few things. I haven't updated my profile info in a while but the engine has the following: 2012 KFX 450R -FMF Factory 4.1 w/ Powerbomb -Procom...
  7. please help w map

    Engine/EFI/Drivetrain
    Hi im hoping someone on here can help me or at least give me a decent map. Im having my top end redone and wanted good map for my mods, i have the follwoing: procom adj. ecu, fci w box, fmf factory 4.1 exhaust w megabomb header, dynatek coil, shorai lithium ion battery, aftermarket hd voltage...
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