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  1. #1

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    Exclamation Yam FZR Riva stage 3+ with Athena Pro ecu problems

    Hi guys i have got a 09 Yam FZR of which i have upgraded to a riva stage 3+ with all the part suggested including the Riva Athena ecu.

    The first time to took the ski out as a stage 3 the engine picked up on one cylinder badly. This as thought to be down to fuel.

    I then completely rebuilt the engine adding bigger injectors etc to make the engine/ski up to a Riva stage 3+ after about 5 hours of use the engine has picked up again on the same cylinder.

    The AFR is all OK and been checked by riva!

    From day one i had small problems with the Athena pro ECU

    Anyone had the same issues?


  2. #2
    bryantjopplin's Avatar
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    Which cylinder? 2 or 3?

  3. #3

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    Quote Originally Posted by bryantjopplin View Post
    Which cylinder? 2 or 3?
    2nd cyl has 10psi the 3rd cyl had just started to pick up with 110psi

    That can't of been a guess! How did you know?

  4. #4
    bryantjopplin's Avatar
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    Well I don't have a fzr but from spending to much time on here reading so much. The stock intake manifold makes cylinder 2 and 3 run lean.

  5. #5

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    cool thanks for that!

    Anyone else had problems?

  6. #6
    while i have no first hand experience a close friend of mine along with a few others on the forums experienced engine failures when the ATHENA was first released.that may very well be why not too many guys run them now a days but there are still a handful on here who seem to have had good luck with them.if your a gambler give it another shot otherwise just stick to whats been powering some of the fastest boats for years and get a reflash.

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