1. Bowser

    Rotax 717 720 Rotary Valve Cover & Oil Injector Assembly

    eBay item number: 125463971734 SeaDoo Rotax 717 720 Rotax Rotary Valve Cover & Oil Injector Assembly Assembly condition: good Oil Pump Flanged P/N: 290 810 781 Rotary Valve Cover P/N: 290 810 528 Oil Pump Assembly P/N: 290 996 725 Original O-ring condition fair. P/N: 293 300 023 Mounting...
  2. P

    587 Single/Dual Carb Differences - Rotary Timing - Port Configuration?

    Hi All. What's the difference between the single and dual carb 587? Obviously the intake manifold is different, but why is there a different spec for the rotary valve timing? Seems like it should be the same unless there is a difference in the cylinder porting or block machining. I noticed...
  3. G

    Rotary Valve Cover Uneven Wear?

    Hello All, I have a 2002 GTI LE into which I'm swapping a new SBT 717, but I'm a bit worried about the rotary valve cover. It isn't gouged or grooved anywhere, and the surface seems relatively smooth, but it seems to be wearing unevenly. Looking at the outside edge, the surface appears worn...
  4. XARiUS

    Im screwed, literally.

    Welp, I am rebuliding my GTI and found a screws between the rotary valve cover and valve, check out the damage below, its pretty deep too. Wondering what I can do to get it back into working order. Can these parts be machined? How about some high grade metal filler? Any advise on were to go...
  5. R

    97 787 rebuild

    I have been rebuilding the 787 for about a month now. the reason for doing it was cause it wouldnt start and one of the cylinders was showing 90 compression while the other 155. well the top of that piston had dents in it everywhere ands even in the head. I pulled the piston off thinking that...
  6. L

    Help with 787 Rotary Valve Gear

    Just wondering if anyone with experience in 787 rebuilds can tell me if the rotary valve worm gear from my engine looks worn. It doesn't seem right to me. The teeth of the gear are sharp almost knife-like. With the crank in the case, there seems to be a lot of back and forth rotational play...