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  1. just bought a 07 ltr not sure if valves problem or efi problem HELP

    General Discussion
    so bought a ltr 07 stock engine it has a it has a fmf power power bomb header with fmf 4.1 exhaust , open air box lid with uni foam filter, and a cherry bomb, I have read around but no post seem to have what Im looking for , this is just for my ease of mind. okay so the bikes starts and runs...
  2. Used LTR 450 - Overheating/Backfire

    Engine/EFI/Drivetrain
    I recently bought a LTR 450 used, it starts and runs good for about 20 minutes. I noticed that I can't ride in shorts, because it gets too warm near the right leg area. When I wear jeans, it will actually burn them a little bit. Another thing is once iv been riding for about 20 minutes, it...
  3. '08 LTR450 slightly bogging and backfiring mid-high rpms

    Engine/EFI/Drivetrain
    So my ltr has a cherry bomb, no air box, k&n filter with pre filter, full Yoshi RS5 exhaust, and it's not quite running right. I've never actually messed with the mapping before, but I'm sure it needs to be tuned. How would I go about doing this?
  4. FI light stays on

    Engine/EFI/Drivetrain
    i got a 2006 ltr450 with a cherry bomb and lid off air box. the light doesn't turn on right away. first all three lights turn on then all turn off but the neutral light. the quad has a super hard time starting. it turns over. then the light turns on and then the quad back fires a couple times...
  5. 07 Ltr 450 backfire and cutting out

    Engine/EFI/Drivetrain
    Hello Im new to this forum, Bought an 07 Ltr 450 last week, starts first time and runs ok however when I go into 3rd or 4th gear there is a big backfire ands cuts out! But then it will start up again no problem What is the problem occurring? Engnition/ecu/censor? Please help Thanks
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