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  1. Hirschfelt

    SX/SXi/SXi Pro 92 750sx, can i replace the crank with a hot rod 22mm ? i need help!

    If you are getting new psitons then that crank will work. You will need the 22mm coupler and big pin pistons. 95 and up the same as sxr 800 pistons. The good news is you now have access to many different 82.??mm pistons. With a small pin crank you only have 82.00mm and 83.00mm. 83.00 is a bit...
  2. Hirschfelt

    SX/SXi/SXi Pro 750sx aluminum front bumper source

    I havent seen them for some time. Mostly see the 550 440 style front brace. I can see the use for dents and dings and bling factor but I fail to see how it will minimize the stress of the fiberglass if you lawn dart during a stab. I havent seen a 750 stress crack up front with out a lawn dart...
  3. Hirschfelt

    SX/SXi/SXi Pro hull reinforcement

    The hull is a 93 so it has been used alot. Fiberglass does get weak. I got the carbon from uscomposites.com. It was left over from last years reinforcement on my 92 hull. Economically I would just use glass. The nice thing with carbon is that you can just sand your hull as is for the pole area...
  4. Hirschfelt

    SX/SXi/SXi Pro hull reinforcement

    Picture of the pole area and dash. I am not using the stock pole bracket so i used 2 layers of thick fiberglass and 2 layers of 17 oz carbon. I also have an aluminum back plate to sandwhich from the bottom of the pole area. I would also agree to add a layer of reinforcement around on the inside...
  5. Hirschfelt

    SX/SXi/SXi Pro hull reinforcement

    I havet seen stress cracks by the rails. Just the pole mounting spot and back by the tray like i said above. The 750 are pretty tuff otherwise. I will try a post pics for better clearity tonight
  6. Hirschfelt

    SX/SXi/SXi Pro hull reinforcement

    I just built my flatwater 750. You want to reinforce the pole mounting area heavily. Also down the lip slightly where water drains from the pole mounting just below the hood seal. If that makes since. The flat portion of the bottom of the ski in the front. Just about where it starts to roll up...
  7. Hirschfelt

    SX/SXi/SXi Pro 650sx 750sx any part inter-changement?

    I have been pondering this myself.
  8. Hirschfelt

    SX/SXi/SXi Pro 750Sx Carb Question, Keihn Vs. Mikuni

    46mm all the way. Who cares about the gas. its a single wont be bad at all.
  9. Hirschfelt

    SX/SXi/SXi Pro Signs of pop-off pressure to low?

    Make and size of carbs?
  10. Hirschfelt

    SX/SXi/SXi Pro Signs of pop-off pressure to low?

    Jetting depends on exhaust pipe and if the cylinders are ported or not. A bit more info would help a lot.
  11. Hirschfelt

    SX/SXi/SXi Pro Are sponsons really worth it on a 750sx?

    I like how my 750 handles with them. They are the original blowsion ones. I would like to put a set of tubbies on my other 750 hull. resin and screws is it.
  12. Hirschfelt

    Kart Tank modifications

    What needs to be done to run the 9 liter kart tank. Breather line? I tried running a fuel filter off the main fuel line but it only filled half way so i thought it may get an air bubble sent through the line and didn't want to risk that. all suggestiosn greatly appreciated.
  13. Hirschfelt

    SX/SXi/SXi Pro OEM B and C marked pistons on SXI Pro questions

    It all comes down to proper machine work. I would never stick a same sized piston in a cylinder without proper clearance gap. As long as you have the cylinder properly bored and honed and the gap is within a proper range the letters wont matter. Measurements never fib. The letters may be a way...
  14. Hirschfelt

    SX/SXi/SXi Pro OEM B and C marked pistons on SXI Pro questions

    All oem bigpin pistons will work just fine.
  15. Hirschfelt

    SX/SXi/SXi Pro foam

    does any body have pictures of the tray removed? I am about to cut the holes for my foot holds and then cut the entire tray out to remove all the foam. Using the pink stuff from home depot. I am concerned about the 4 recessed area for the pump nuts. How close is that to the under layer and how...
  16. Hirschfelt

    Other Who's one way valve does not leak?

    I have had my blowsion one in since 2003. Its the sano / flush mount one. Very happy with it.
  17. Hirschfelt

    SX/SXi/SXi Pro 750sxi pro + fpp ???

    The pipe screws work as follows. Opening the screw closest to the manifold will increase low end. As you move away from the manifold and open the bottom one that will increase top end. You must close down the first screw and open the last when running a bouy corse. You do not want too much...
  18. Hirschfelt

    New Carbon Hull........Bottom modification help needed???

    You mentioned the seadoo cylinder in earlier posts. is that what you are currently running on those billet cases? keep us updated on that beast. looking great!
  19. Hirschfelt

    SX/SXi/SXi Pro Pipe question...

    the retard module will prevent the piston issue at peak rpm. I would not run advance and an enhancer with out the retard module.
  20. Hirschfelt

    SX/SXi/SXi Pro How and where to install front sponsons

    I found with the original front sponsoons was that it got my ski up on plane at lower speeds and got the nose to ride up. This for me was a desired set up for my style riding. The front sponsoons combines with rear hull extensions will allow the boat the turning ability while keeping the nose...
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