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  1. oldschool440

    Whats up Toby it's Mike aka seadoobutch787

    Whats up Toby it's Mike aka seadoobutch787
  2. oldschool440

    Hey guys jetting 750SP with 800sxr carbs

    Alright here goes. I built a 550/750 conversion a couple years ago and in the beginning I ran a 44sbn and it ran sweet! Now I scored a set of 800sxr carbs for my 750ss small pin and I'm wondering what jets I should run on my setup. Right now it has 150m 80l 1.5 N&S 80 gram spring. The throttle...
  3. oldschool440

    800 kawi or yamaha motor in a 550

    Piece of cake building a 550/750 with 750 pump.
  4. oldschool440

    How much for the parts I need bud?

    How much for the parts I need bud?
  5. oldschool440

    800SXR jetting with 750 motor

    Hey guys I just recently built a 550/750 conversion. My ski has a SP 750 with Coffman 3rd Gen pipe Milled head Lighten flywheel Timing advance 44 sb
  6. oldschool440

    Not enough rotation (Back Flips)

    Tipafew We do get rollers like that on lake Michigan, in the fall around Sept-Oct.
  7. oldschool440

    Supertrapp waterbox?

    Hey guys I'm building a 550/750 right now. I have a Supertrapp waterbox that has the open end cap and 7 discs, this was run in my 550 for awhile. I'm going to be using it with the 750 kawi that is going to be a limited mod. How many more discs should I run in the supertrapp? The hull is a 95...
  8. oldschool440

    Can i fully advance the timing on my stock JS550

    I ran my 550 for years with the timing advanced all the way and this was with a ported cylinder,coffman pipe,milled head and sbn 44 with no problems! Just run 93 octane in it! I could hold that thing pinned for awhile. I have a nice 550pp head that was milled by groupk I can sell ya,it ran...
  9. oldschool440

    How can i get the most Braaap?

    Put a 750sp in that ski!
  10. oldschool440

    SX/SXi/SXi Pro Small pin carb upgrade ???'s

    Will the stock 750sx throttle cable work on 750sxi carbs? I think that the 750sxi is longer. I want to upgrade to 96 or newer mikuni duals which run on the sxi. Riggowrestler when you said those carbs rip, do they rip all over the powerband or just low or top end?
  11. oldschool440

    300/440/550 stock 88 550sx with 44sbn, need jetting

    On my buddys 88 550 he has a stock motor with only an old school K&N air filter. Could i get some info on Good N&S size jets spring also will he need a throttle drum on that carb or will the stock 550 throttle work. Thanks Mike
  12. oldschool440

    Freestyle 750sx skat 9-17 impeller

    I know this is an older post but i have a limited 750sx and right now it has a skat 9/17 standard prop in it. I want to get better bottom end and i was wondering if i could run a skat 12/17 swirl which is recommended for a limited 750sxi. What do you guys think? Or maybe lol i will wait to put...
  13. oldschool440

    Other Kawi 750sx build

    ...I put the HT sides on myself using glue instead of staples, using staples makes the 18yr old plastic really brittle so that was the best thing for it. I plan on putting HT B stock on the rails in the next week or so, then it's off to get some MC# and a graphic or two. Then a couple more...
  14. oldschool440

    Other Kawi 750sx build

    ....I sanded the kawi green with 1500 grit paper to get the orange peel out and then i buffed it up nice. I scrubbed the bottom of the engine bay with degreaser and some other cleaners. I then applyed appliance epoxy white paint and it turned out real nice. I painted the motor mounts and the...
  15. oldschool440

    Other Kawi 750sx build

    Here are some more
  16. oldschool440

    Other Kawi 750sx build

    Here are some more pics. This is the breakdown of the graphics and paint on the hull and handlepole. I sand blasted all the alum parts and repainted. The hull and other parts were painted with filler primer paint from PPG. I took all the purple vinyl off the kawi side covers and cleaned them up...
  17. oldschool440

    Other Kawi 750sx build

    I started this Kawi build in Sept of this year, it is coming along nicely. Here are some pics The ski has Kawi fleet lime green paint Alum handlepole 800SXR chin pad R&D timing advance plate Factory limited wet pipe R&D head Reed stuffers and Boyeson reeds Stock rejetted carb, probably...
  18. oldschool440

    Other Looking for #zero

    Looking for #zero is anybody knows him send him my way, i have some parts i want him to mod. Thanks Mike
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