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  1. MTRHEAD

    Crankshaft

    I’ve only seen them on a few early 1990 skis. Local salvage place has 50+ 650’s and all are 6M6 webs and solid rear. These skis are 1990-1993. Same as the 760 crank with holes in rod versus slot. Just a few from early 96’.
  2. MTRHEAD

    Rocky Mountain Fantasy SX

    Always since 80’s
  3. MTRHEAD

    Rocky Mountain Fantasy SX

    I know! I picked it pretty darn close. I think 100000+ got it super wrong!
  4. MTRHEAD

    FS. NEW 61x dual intake and New carbon tech

    For Sale: Superjet 61x billet ported dual intake for 44-46mm carbs, brand new Carbon Tech reeds, cages and hardware. $150 shipped in USA. No fees Detroit area
  5. MTRHEAD

    Rocky Mountain Fantasy SX

    Yes. Without PulpMX fantasy in so many states Rocky is the only one left
  6. MTRHEAD

    Want to Buy superjet rn pole

    There was 3 to chose from on FB. RN and 21+ for 200 each.
  7. MTRHEAD

    The battered SN restoration

    My square goes in 60’s on stock single cooling line and stock exhaust tube.
  8. MTRHEAD

    waterbox, exhaust hose, nozzle, battery tray, etc

    What year nozzle do you want? I have a square nozzle/steering. Only negative is they don’t have bilge hose connectiong but it’s same size/shape as 96-07 I have the OEM intake setup. Mint like new Plate, screens, top, runner turn Everything $50 shipped in USA. (I will pay shipping and no...
  9. MTRHEAD

    Hoods

    I bought a 100% mint 95’ square hood with all hardware. $125 local. It was like new
  10. MTRHEAD

    Triton Lite capacity?

    1.75” axle. 5 lug
  11. MTRHEAD

    Triton Lite capacity?

    I’m toying with the idea of putting my 22’ in the center and 93’ and 14’ on each side. That’s about 1500 fully loaded with extra gas tanks
  12. MTRHEAD

    Triton Lite capacity?

    I saw that online for the newer ones. I don’t think that is my model (?) My width is only appx 92”. Maybe it’s same? I don’t know and Triton wasn’t much help since my trailer doesn’t have the sticker
  13. MTRHEAD

    Triton Lite capacity?

    Does anyone know the official capacity of this Triton Lite trailer? There is no sticker showing the GVW either only the safety sticker.
  14. MTRHEAD

    Increasing SNSJ exhaust diameter - Worth doing?

    If you’re only looking for a performance increase, assuming you’re using a race style modified Yamaha 62t based twin, I wouldn’t bother because you won’t notice. This discussion is similar to guys changing to aftermarket water boxes in skis that really need the oem waterbox back pressure to...
  15. MTRHEAD

    Increasing SNSJ exhaust diameter - Worth doing?

    My square goes in the 60’s and accelerates with the best of them. Unless your tray is full water I wouldn’t bother. i also used the bigger hose from the stock 96+ Aluminum box to the back stock 93 tube. Had to splice it a couple inches longer but it just squeezes down to fit on the 90-95...
  16. MTRHEAD

    Yamaha 760 Piston measurement Wiseco 85mm 757M08500?

    Just curious if the new Wisecos are sized like you say or not. I have plenty of “older” Wisecos that were stamped 84.9. So I didn’t know if the newer ones that’s are over sized they call out piston size or bore. I did find a brand new M08800 last night and it was about .006 undersized to...
  17. MTRHEAD

    Yamaha 760 Piston measurement Wiseco 85mm 757M08500?

    Can someone please measure a brand new 757M08500 Wiseco for a Yamaha or Woosner Note please measure the fattest part “about 1/2” up” from bottom usually is fattest on latest Wisecos I’ve seen The ProX 85mm 01.2514.100 is 84.91mm or 3.343”. Is the Wiseco 85mm (3.3465”)? Or is it 84.91mm too...
  18. MTRHEAD

    650sx cheater head

    WestCoast Performance Products
  19. MTRHEAD

    650sx cheater head

    Is this the head that west coast made in late 80’s early 90’s? They machined out a stock head to accept domes. If so I believe you just need is the WPP 650 domes and the special head gasket. I had a few of those 750 heads in early 90’s and they used same domes as the aftermarket WPP head...
  20. MTRHEAD

    Where's the best place to buy or have a crank rebuilt?

    650 is a thinner web crank. Preferred in years past - illegal in certain racing classes because you were only allowed to back date same model. SJ 650 is a different model than SJ700. but anyways requires welding for phase protection in high hp motors and racing high HP twins is a thing of...
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