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Thread: 2001 1200gpr

  1. #1

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    2001 1200gpr

    Ok here is a little background i bought this ski from a kid who only had it for 3 days from the guy he bought it from when 3cyl went bad. I had 3 cyc rebuilt and new rings in front 2 cyl. This was end of season last year, had compression checked at start of season this year and showed 160 accross with snap on guage. I went out with tiny tach this weekend and pulled 7200 rpm and had a friend with a gps ride beside me and said we ran around 65mph. My problem is the ski has a Riva stage 2 kit that was on the ski when ibought it, i aslo got tote with some oe parts from the upgrades. In the tote is a island racing impeller box with model YFCD 13/19 and pitch 11/19 on it. My question is should this ski not be running close to 70 and is this the wrong impeller pitch the cause for slow speeds thanks for the help i read alot on here just to many experts for me to post replies.


  2. #2
    All hail the Chief! fullboogie's Avatar
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    1) No, 70 is a hell of a lot harder to hit than you think. If those are the only parts you have, and have done no other work, I don't think you're going to hit 70. You should be closer than 65, though.

    2) Are you sure about that 160 psi? Sounds a little high for what you've got.

  3. #3
    icky002's Avatar
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    Stage 2 should be around 70mph according to rivas website:

    http://www.rivayamaha.com/pwc_perf_p...200_stage2.asp

    Not sure about the prop, you say it's just an empty box? I guess the only way to really know is pull the pump and look at the impeller and see if there are any numbers on it.

  4. #4

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    it appears the oe impeller is in the box from island racing, and yes i asked three times about compression numbers to be sure. I also thought a stage two should be around 68 to 70 I thought this ski would do 65 stock. I have not had anything off yet but can see the trim tabs have been shimmed in the back with one washer

  5. #5
    All hail the Chief! fullboogie's Avatar
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    Well, if Riva says it then it must be true.

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    TTT

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    Mike's GPR's Avatar
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    2001 1200gpr

    Quote Originally Posted by fullboogie View Post
    1) No, 70 is a hell of a lot harder to hit than you think. If those are the only parts you have, and have done no other work, I don't think you're going to hit 70. You should be closer than 65, though.

    2) Are you sure about that 160 psi? Sounds a little high for what you've got.
    Very true! Just bolt on Riva parts don't make that much of a jump in speed. It's the bolt on parts, tuning, and attention to the very small details that will make you hit 70 on a gp1200r. And a solas concord 13/19 likes to top out at around 68-69 if your dialed in from my experience.

    You may need to run premium gas if you actually have 160 psi! Get your own compression guage, I got a decent one for $30 at autozone.

  8. #8

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    thanks everyone for the help so far i am searching for all the good setup tips on here was really wondering about the impeller saying it was pitched to 11/19 does this sound right and i found out yesterday that i am missing a bolt from intake grate and one is loose so will have to fix this before next ride. I am also going to be posting pics tomorrow so that i can get some help identifying exactly what aftermarket parts i do have thanks again for helping a newbie out. Does any one know what size bolts go in the intake grate so i can pick them up on my way into the lake.

  9. #9

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    Also i am runnig 93 octane but i think the plugs are bres6 if this sounds right. What is the best plug to run with the setup?

  10. #10
    cool daddy, if in fact there is an Island racing prop in there, there will be numbers engraved inside the prop hub of what the pitch is...

    riding areas and air temps also play a role in max rpm...

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