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  1. #1

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    Power Valve Elimination?

    Is eliminating the power valves an option with the 99 XL 1200s? Can I go to a non-PV Cylinder with a crank change?


  2. #2
    dhoad's Avatar
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    I am no expert but I think you would need to change over cylinders, pistons and head, but you could retain your current crank. You could have Lowell Horning lock or weld your PV in place to save on changing a bunch of parts. Your bottom end power will suffer but could be made up to some degree by higher compresion head.

  3. #3
    32 Valves To Love! Racecar_Dave's Avatar
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    I was going to suggest welding them open as well

  4. #4
    PolarisNut's Avatar
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    Quote Originally Posted by laker241 View Post
    Is eliminating the power valves an option with the 99 XL 1200s? Can I go to a non-PV Cylinder with a crank change?
    The only non-PV cylinders you can use are the 05-08 1300 ones. The old school 65U setup won't work.

  5. #5
    WATER WOODY's Avatar
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    Quote Originally Posted by laker241 View Post
    Is eliminating the power valves an option with the 99 XL 1200s? Can I go to a non-PV Cylinder with a crank change?
    I recommend you DONT go to non pv on an XLT. The bottom end will suffer for that weight of ski. Go gas valves if anything.

  6. #6

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    Gas valves? please elaborate a little more.

  7. #7
    zx11rider's Avatar
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    Gas valves.... Gas-Operated Powervalves Designed to replace electric Yamaha Powervalve system on Yamaha 800/1200/1300 Powervalve motors. This race-bred valve assembly is simple, lightweight and reliable. Reaction time is faster than electric system providing increased acceleration and throttle response. Requires SD Parts Kit (sold separately). Note: Compatible with stock or aftermarket exhaust system on GP1200R/XL1200Ltd/XLT1200/GP1300R. Compatible with aftermarket exhaust system only on GP800/GP800R. IJSBA Superstock legal.
    Note: Valve must be trimmed for proper piston clearance. RY10015-SD-KITParts Kit, SD Powervalve, for RS10017$129.95 RY10017Powervalve w/Adapter, 800/1200 (66E/66V) 1 Valve$159.95 RY10017-BReplacement Bellow, for RY10015-SD-KIT$ 32.50

  8. #8
    dhoad's Avatar
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    Quote Originally Posted by WATER WOODY View Post
    I recommend you DONT go to non pv on an XLT. The bottom end will suffer for that weight of ski. Go gas valves if anything.
    do what woody says, that is a much better solution than junking the PV

  9. #9

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    Wow..I have these on my Polaris sleds and should have thought of it. Thanks Mr. Obvious...should have made the connection. Seems like it would be kind of tight with the exhaust on #2 but I'll check into it.

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