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  1. #1

    "HELP" Power Valves not working or trim tabs???

    I have a 01 GPR1200r with 80hrs on it with Riva stage 2 mods. Just installed wave eater clips and couplers and R&D trim tabs. I lost a lot of Top end...my top speed on the stock speedo used to be around 68 to 71mph...and now I cant get it past 63mph... When I rev the engine are this power valves supose to be moving??? because I get no movement. How do I know if they are working? or is it the tabs?


  2. #2
    Moderator OsideBill's Avatar
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    Tabs will slow you down and the OEM speedometer is not at all accurate. power valves should cycle start it and turn it off they should run their cleaning cycle.

  3. #3

    PVs

    What are you suppose to hear or see??? Im getting no movement

  4. #4
    mrbtd's Avatar
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    Quote Originally Posted by unscorpio40 View Post
    What are you suppose to hear or see??? Im getting no movement
    Standing on the exhaust side look @ the cables on the right. On the thrid cylinder you had to take off the bracket to do the clips. Make sure nothing came disconnected. This is how the valves open and close.

  5. #5
    Moderator OsideBill's Avatar
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    http://www.greenhulk.net/forums/show...03&postcount=1

    The link I posted is to the owners and service manuals. download them it desribes the cleaning cycle, basic operation and adjustment of the YPVS. It sounds like you have a bad servo motor or wiring connection.

  6. #6

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    Tabs may have affected the speedo readout more than they affected speed.

    When I put a 1200 intake grate on my ski (otherwise stock) the speedo reading went down 3-4 mph in most circumstances, but according to the GPS I may have lost half a mph at the most.

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