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  1. #1
    Budman's Avatar
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    Installing a new set of rings and have questions.

    I have a 98 GP1200 waverunner. I need to replace the rings and I have some questions. I remove the flame arrestor and exhaust manifold and head. I thought the cylinders were separate pieces but they are all one piece. I have not pulled the cylinders yet but I was wondering how do I compress the rings to install the cylinders? I would have to insert all three pistons at once. Also when I reassemble do I coat the gaskets with anything? I was going to have the cylinders ported but I am not sure because of the cost. I didn't think it was going to be around $700.00 to have it ported. Does anyone think its worth the money to port?
    Thanks

    Budman


  2. #2
    Moderator OsideBill's Avatar
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    The pistons go in the cylinder one at a time, you have to stagger them. What type of gasket are using? OEM or aftermarket? Who did you go to for porting?
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  3. #3
    Budman's Avatar
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    Thanks, The pics are great. The quote on the porting was from West Coast Porting. It was 625.00 plus shipping both ways. Will this make a big difference in how it runs? The gasket set is WSM. Also I have question about the intake. I was going to inspect the reeds and install stuffers. Can I remove the intake manifold without removing the carbs from it? Also can I reuse the cage gasket as there wasn't one in the top end gasket set?

  4. #4
    Moderator OsideBill's Avatar
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    I had mine ported by Woody, he did a great Job. Porting does make a big difference. I believe you can remove it that way, I have never tried it. The gasket can be reused as long as it does not tear when you remove it. I have that one as well as the manifold gasket if you end up needing them.

    Here are some pics of Woody's 65U porting
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  5. #5
    Budman's Avatar
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    Thanks for the help. I had the head cut by riva. That plus porting should give it more get up and go. Another question. Are the aftermarket rings as good as OEM? Watercraft super store has them for 21.00 a set. Yamaha wants 67.00 a set. I have not ordered the rings yet because a shop here in town is going to measure the cylinders for me to see if I need to have them bored. I'm sure I will have a lot more question as I go through this.

    Budman

  6. #6
    L Carlson's Avatar
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    I love Bills Porn!!!

  7. #7
    Moderator OsideBill's Avatar
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    The only aftermarket rings I have used were Pro-X on Pro-X pistons, or Wiseco on Wiseco pistons. The OEM are pricey $46 at boats.net http://www.boats.net/parts/detail/ya...603-01-00.html

  8. #8
    Budman's Avatar
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    Bill, I ordered a riva return line restrictor and two main jets for it. 105 and 120. Which do you recommend I use? Also does it matter where I install it in the return line?

  9. #9
    Moderator OsideBill's Avatar
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    I would start with the 105, on the older school carbs I find they end up in the 105-110 range.

  10. #10
    Budman's Avatar
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    Well, I just got the pistons and cylinders back from the local motorcycle mechanic. He said that rings will not fix the problem. He says it needs to be bored out. I am going to see if one of the porting shops can also bore it out for me. Is it cheaper to get the pistons from the porting shops or just get them myself online? Do they need the pistons when they bore it to check the fit?
    Thanks
    Budman

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