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  1. Replies
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    For these piston wash pics, are you wiping the...

    For these piston wash pics, are you wiping the piston top clean with solvent, or is that the appearance when the head is removed without touching the pistons?

    Thanks,
    Mike
  2. Thanks J. 90% of my riding is in rough water...

    Thanks J. 90% of my riding is in rough water with 1-2ft chop and some days 3ft. I'm leery of giving up rough water hookup for a few mph on the top end. Also I'm not interested in spending too...
  3. Thanks J, for some reason I thought I read that...

    Thanks J, for some reason I thought I read that max RPM was 7200. Oh well, good to know that I have some room before I reach the RPM limit.

    I installed the 85mm exit nozzle today and was able to...
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    I would put threaded inserts such as heli-coils...

    I would put threaded inserts such as heli-coils in those motor mount threads. You don’t want that engine coming loose, ever.

    Mike
  5. Thanks, Adam. I bought one off eBay tonight and...

    Thanks, Adam. I bought one off eBay tonight and should have it on the ski by next week. We'll see what she will do!

    Mike
  6. Considering a 15/22 Dynafly. Will it work?

    I recently finished my 2000 GP1200R conversion to a 1300. I'm still fine tuning the carbs, but for now I'm fairly close. I can run 67mph (GPS) at 7150rpm for extended periods (15+ minutes) with...
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    Cool! I guess I’ll order a new head gasket and...

    Cool! I guess I’ll order a new head gasket and remove the middle layer to gain a few psi and post pictures when I pull the head. My last ride, I probably had over an hour of WOT, so I should have a...
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    How soon after a fresh rebuild should I evaluate...

    How soon after a fresh rebuild should I evaluate my piston wash? I'm still breaking in the engine and the first hour was with 32:1 premix using SBT break-in oil. I have Pro-X pistons in fresh...
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    All sorts of people carry Part #60T-13766-00-00. ...

    All sorts of people carry Part #60T-13766-00-00. Prices vary from $13.50 to <$10 each. I didn't actually order any but I put 3 in a cart at several sites and none reported "out of stock"
  10. I replaced a few of the head bolts on my rebuild...

    I replaced a few of the head bolts on my rebuild because the threads looked questionable, otherwise I reused mine. If the bolts are torqued or stressed beyond their limit of elastic deformation,...
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    7-10-19 Got it started today! :D YESS!! It...

    7-10-19

    Got it started today! :D YESS!! It idled pretty smooth, too, all things considered. I only let it run for 10 seconds or so as it wasn't on the hose. Before starting, I had to fix a...
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    List of Modifications Carbs/Intake/Fuel...

    List of Modifications

    Carbs/Intake/Fuel
    Drilled return restrictors and added 100 jet in return line (changed restrictor jet to 90)
    Extended both fuel pickups to bottom of tank and removed...
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    2000 GP1200R Conversion to 1300

    I thought I would start a build thread to document my experience rebuilding/converting my GP1200. This all started 2 years ago when one of the washers bracketing the piston pin bearing got loose and...
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    Got the engine in yesterday and working on the...

    Got the engine in yesterday and working on the exhaust and cooling hoses. Went to connect the Power Valve cables and discovered I had the Pulley 180 degrees out of phase.:facepalm:

    Got that fixed...
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    If your carb disassembly doesn't reveal any...

    If your carb disassembly doesn't reveal any obvious problems, you might consider doing a leak down test on that engine. You might have an air leak somewhere that is causing your lean condition on...
  16. Thanks, guys. The SBT look slightly better...

    Thanks, guys. The SBT look slightly better quality machining than WSM, so I guess I'll give SBT a try.

    Mike
  17. Need to Buy Power Valves: OEM or Aftermarket???

    I'm building a single pipe 1300 conversion from a 2000 GP1200 and I need to buy new power valves. The most common choices appear to be OEM, WSM or SBT. There is also a JSP brand, but the pictures...
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    +1 for Group K. I called several places and...

    +1 for Group K.

    I called several places and they were the only shop that could do the work. Iím in the middle of a Ď00 1200 conversion to 1300. Just got my cylinders back from Millenium and hope...
  19. Hey Adam, Group K took my stock head and...

    Hey Adam,

    Group K took my stock head and machined the squish band out to 84mm and slightly blended the transition from the squish band into the dome. I did not ask them to take anything more from...
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    Get some VForce3 reeds...

    Get some VForce3 reeds from Rich at WFO Performance. Problem solved.

    Mike
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    My recent experience with this issue is that...

    My recent experience with this issue is that Pro-X does not intend to manufacture pistons with a centered retaining pin in the future. It's too bad you didn't post this sooner, I might have been...
  22. I just received a new set from Pro-X and they...

    I just received a new set from Pro-X and they have the tapered rings and offset locating pin. My original set were mismatched with a centered pin and tapered rings. Fortunately Pro-X replaced them,...
  23. Thanks, Mike. That’s reassuring. Hey Adam....

    Thanks, Mike. That’s reassuring.

    Hey Adam. Based on multiple searches here, I was planning to start with the following carb settings:

    135 Mains / 1.5 turns out
    115 Lows / 1.5 turns out
    1.5...
  24. Will the exhaust still get enough water to...

    Will the exhaust still get enough water to prevent hoses from melting?
  25. Modified Cooling for GP1200R PV Conversion

    http://greenhulk.net/forums/attachment.php?attachmentid=447373&stc=1

    I'm rebuilding a 2000 GP1200R by boring and replating the cylinders out to 84mm to build a 1300. I'm not after huge HP gains....
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