crashnburn86

So me and a friend did a 550/650 conversion.... We both did The stock 650 exhaust mod and mod'd stock 650 waterboxes. They both have 44 mikuni's on them with aftermarket bcw intake manifolds. What jetting would anyone recommend to start out with.

SflSwampRat

i find that stock yamaha 650 jetting is always a great place to start. its always very close.

crashnburn86

ok so what are those jets at?

StandUpGuy23

stock yamaha 650 jetting? not stock kawi?


Does anyone know where to buy jets cheap?

I would also like to buy a box that holds jets as well?

Does anyone sell a kit that includes a box and various jets?

How about something similar for needles, seats and springs?

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JS550/650 conversion- ported (exhaust ports widdened 2mm, raised 1mm, transfers stair stepped, cases ported), Blackjack 46mm, Prok FA, Boysen reeds, stuffers, Westcoast head 30cc domes (175psi), Jetinetics charging flywheel, Dale's Bad Attitude Ignition, PJS exhaust manifold, Factory Performance Pipe, Coffmans Waterbox, footholds, Team Waterfly Tubbies.

650 pump conversion- SXR prop cut to fit 650 pump repitched to a 9/17, TBM pump stuffer, OP nozzles, and OP skegged ride plate.

StandUpGuy23

???

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JS550/650 conversion- ported (exhaust ports widdened 2mm, raised 1mm, transfers stair stepped, cases ported), Blackjack 46mm, Prok FA, Boysen reeds, stuffers, Westcoast head 30cc domes (175psi), Jetinetics charging flywheel, Dale's Bad Attitude Ignition, PJS exhaust manifold, Factory Performance Pipe, Coffmans Waterbox, footholds, Team Waterfly Tubbies.

650 pump conversion- SXR prop cut to fit 650 pump repitched to a 9/17, TBM pump stuffer, OP nozzles, and OP skegged ride plate.

crashnburn86

Alright so i pulled my jets and im at 120 main 100 pilot anyone know if this is ok for my setup?

BLRider

I would start there. If I remember correctly I was at 122.5 and 100 on my conversion ski.

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Never argue with an idiot, they will drag you down to their level then beat you with experience.

550sx Conversion ski - Version 3.0

Head re-chambering by Newmiller Machine - Screen name mcn6

Davenjw

but you would need to run what a 650 needs correct? stock 650 runs 115-120 pilot 140-150main 2.0n/s black spring.... your jetting sounds lean.



to run the carb on my 750 i was bumped to 120 pilot 150 main 2.3 n/s 95g

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My ski:

1986 Kawi X-2

750 fresh, blaster chamber, 46mm sbn, aluminum fuel tank, supertrapp waterbox, full steering mods, etc.

crashnburn86

so anyone else? im going to try 145 main 120 pilot black spring ....

bkoche

Start rich and lean it out. Read the Mikuni SBN manual

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2004 SXR - FPP Wetpipe, Blowsion railcaps, 4deg bars, billet clamps
1994 750sx - Loaded -FOR SALE
1983 JS550 - WC RC520 reed cylinder, WC Head, PJS WB, Dual 38SBNs, WC 750 reed stuffers, WC Stacks, WC 6.5gal tank, FPP Halfpipe, SBT High torque starter, 16.5 Skat, Blueprinted 440 pump, lightened driveshaft, 76mm OP nozzle, Jetsport bulkhead brace, 90wt mod, WC scoop, Rend plate, Rear exhaust, Carbon Fiber

1991 Honda CB750
1976 Suzuki RE5A
1976 Suzuki GT750A
1975 Suzuki GT550M