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  1. MTRHEAD

    62T Cases - Found

    Many on FB for $125-$175 Some with all hardware some with no hardware
  2. MTRHEAD

    SOLD R&D Cylinder Lamey Cyl (needs repair)

    8mm cranks use mainly 133 rods (stock Kawasaki and/or Suzuki Tigershark) Some billet Rad cranks used 132 Rad or 132 KTM. I also know of a couple that ran 135 GPR rods to run SXR pistons What is needed is what is the total cylinder height. What is the exhaust height to top of cylinder and what...
  3. MTRHEAD

    Superjet actual weights

    Thanks. That sounds almost exactly same as my estimate after backing out gas.
  4. MTRHEAD

    Superjet actual weights

    it’s dry. Maybe the parts are more than 35. I know the pump setup is easy 10+ more than oem. Anyone have a picture of a superjet on a scale near 300lb? I’ve never seen one.
  5. MTRHEAD

    Superjet actual weights

    Full tanks of gas (about 5.3 gallons 33lbs or so) Didn’t weigh the gas but all 3 machines took a touch less than 5 1/2 to fill up out the spout burping. All skis have batteries and fire extinguishers 2022’ 444lbs Jettrim, grate. Net= 411 appx 2014’. 369lbs. Tubbies, rear sponsons, 760...
  6. MTRHEAD

    Charging system troubleshooting

    Like JC said above: “The machining process to lighten the Flywheel can damage the Magnets by applying Heat and Bending stresses”.
  7. MTRHEAD

    Charging system troubleshooting

    Majority of the charging issues I have personally encountered and seen with others is on lightened flywheels. See JC’s post. I experienced charging issues on two flywheels I worked on that were lightened by so called experts on this board. They honesty didn’t know they inadvertently screwed...
  8. MTRHEAD

    Pump Pressure

    I did some testing on a sxr800 superstock in 03 and I recall the max pressure in a cooling line of around 40psi We used to run 2 - 1/2 lines in and 3 out head. Can’t my find notes to double check.
  9. MTRHEAD

    R&D "Semi Dry" exhaust... anyone ever use one? PFA

    Maybe $500? There’s a minty dry one forsale for $600 shipped on the net for sometime. This was a spec racing pipe people used. Spec is just about gone. LITES 760 is the main Superjet class
  10. MTRHEAD

    R&D "Semi Dry" exhaust... anyone ever use one? PFA

    Good power That’s the wet pipe. The semi dry I’ve only seen 1 and it had a water jacket on the diffuser portion of the stamped aluminum then from the belly back it was wet. Almost like a Mach2 I’m concept
  11. MTRHEAD

    760 OEM flywheel charging issues

    Thank you for sharing. Glad I’m not only one. BTW: last summer at end of year we put that lightened wheel on another boat (stock 760) and guess what? Dead battery and it that boat has never gone dead before.
  12. MTRHEAD

    Triton lite - rear tie down?

    Thanks! That was one of my thoughts. Thanks to all. Just didn’t want to do anything and then see someone did something really clever.
  13. MTRHEAD

    Triton lite - rear tie down?

    Does anyone have creative ways to tie down back of stand ups on a triton lite? There are absolutely NO holes and NO provisions for tie downs. I have some ideas but want to see what others have done The bunks are short and skis hang off back end quite a ways.
  14. MTRHEAD

    Hull WTB: 96’-20’ SJ hull

    Looking for 96-20 Superjet hull. Bare or parted Please PM Thank you
  15. MTRHEAD

    760 Crankshaft differences?

    This is the slot on every Yamaha twin crankshaft I've ever seen until this weekend.
  16. MTRHEAD

    760 Crankshaft differences?

    My guess would be the slots are cheaper: #1 Huge volume #2 Fast broach or horizontal fixture mill My guess drilled would be much more expensive #1 extremely low volume #2 Drill, with fixturing and consumables vs. broach/Horizontal mill
  17. MTRHEAD

    760 Crankshaft differences?

    Yamaha 760 64x crankshaft out of a 1996 WB2 Never seen one with holes in bottom of rods versus slots. I’ve seen maybe 100+ Yamaha oem cranks. This is a first. My guess very early 760 crank? I’m guessing this was done for strength and they reverted back to traditional slots for some...
  18. MTRHEAD

    Want to Buy Reeds

    Like new Protec ported. No PayPal fees No friends crap required No other BS on price Just $150 and it will ship
  19. MTRHEAD

    Rocky Mountain Fantasy SX

    I was so dumb! Put my pulp mx pics in and forgot rocky
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