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  1. #1
    Hydrotherapy's Avatar
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    compression on gp 1200 2001

    guys whats a good compression for a (stock) gpr 1200 2001...

    found a mint 2001 for the right money and want to test comp before i part with money..

    thanks as always paul..

    sorry just saw i missed the "R" off the title


  2. #2
    mrbtd's Avatar
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    120

  3. #3
    Hydrotherapy's Avatar
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    Quote Originally Posted by mrbtd View Post
    120
    thanks bud, is the 120 plus or minus any or does it have to be dam close to be a good one..
    assuming #1 #2 are 120 and three will be down to aprox 116 ish..

  4. #4
    mrbtd's Avatar
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    on the 1200's the #3 is not staggered for compression.

    I am not sure what a "wear" number or acceptable comp would be. From memory mine was 118 when i bought used with 60ish hours.

  5. #5
    Hydrotherapy's Avatar
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    Quote Originally Posted by mrbtd View Post
    on the 1200's the #3 is not staggered for compression.

    I am not sure what a "wear" number or acceptable comp would be. From memory mine was 118 when i bought used with 60ish hours.
    mrbtd..thanks will lok for a solid 120..

    this is why i want a 1200 as just got to grips with my 13 and need to keep learning..thanks for info..

    assume they re jet #3 slightly diffrent to allow for heat..??

  6. #6
    Like it really matters? You know your gonna have that other engine of yours slapped in there in no time anyway. My main question is will it be a single or a tripple when your done?

  7. #7
    i can answer that for him as he talked non stop about it last night at the pub.... ..man good job i was getting drunk..

    single pipe all the way due to the abuse it recives wave jumping,his mate mangled a set bad jumping..

  8. #8
    Mongoose's Avatar
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    Salty,
    120 psi, and about 5psi less after manually opening the powervalves.
    this is a good indication the the powervalves are all going up and down!
    (Just grab the little wheel on the back and turn it, and disconect the little triangular 3 pin plug by the p.v motor).
    I know you and most people here probably know, but with the Yams, if you hold the stop button down when you hit the start button, it stops the spark to the plugs-saves trying to ground them!
    Theres a cracking one on Ebay now-70 hours, roller trailer for £2650. Somebody is going to get a bargain. If I had'nt just spent 32k on a new boat, (and if my wife was away) i'd buy it myself!

  9. #9
    mrbtd's Avatar
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    Quote Originally Posted by Mongoose View Post
    Salty,

    I know you and most people here probably know, but with the Yams, if you hold the stop button down when you hit the start button, it stops the spark to the plugs-saves trying to ground them!
    I just learned something new ! Thanks for posting that.

  10. #10
    Quote Originally Posted by Mongoose View Post
    Salty,
    120 psi, and about 5psi less after manually opening the powervalves.
    this is a good indication the the powervalves are all going up and down!
    (Just grab the little wheel on the back and turn it, and disconect the little triangular 3 pin plug by the p.v motor).
    I know you and most people here probably know, but with the Yams, if you hold the stop button down when you hit the start button, it stops the spark to the plugs-saves trying to ground them!
    Theres a cracking one on Ebay now-70 hours, roller trailer for £2650. Somebody is going to get a bargain. If I had'nt just spent 32k on a new boat, (and if my wife was away) i'd buy it myself!
    the cracking ski has gone off e bay.. ..guess who bought it...

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