rowdy925

So I picked up Goatcher's 93' Pro Mod 550 for a sweet deal! Even came with a Westcoast rolling stand for free and the hull and paint are still beautiful. It's complete and everything looks to be in good condition other than it needing a a fresh top end and crank. Everything looks to have been smoothed out pretty good and the porting is top notch. However...I am having a personal dilemma. The drive shaft is OEM 440, the bottom's of the dual 38's hang into the intake tract's, the cases are untouched other than the pulse fitting's and the bearing housing for the drive shaft still utilizes packed grease vs. the ATF conversion. Sooooo...should I restore the ski as is or should I modify the things I would have expected to be modded on a full blown race ski? My other concern is screwing up the dynamics if this ski...one of those mods could change everything when you have such a finicky motor, but I just don't see it and I desperately want to correct the stock or bolt on deficiencies...I need input. Does anyone know if that ski had all those mods done but things got changed down the road as it passed through owners or thats just how it was?

bkoche

is it the wc reed top end?

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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

rowdy925

Yup

StandUpGuy23

go ask the ski clinic. My vote is to port the cases, go dual 44 carbs, ATF conversion and an afterburner pump.

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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.

rowdy925

Dual 44's are way to much for a 550 (44's are to big and don't produce enough intake velocity which kills low end and throttle response) in my opinion and it has the original stainless PJS afterburner on it already. I talked to Derek at ski clinic and he said the cases were left like that purposely...however Derek's 550 information has been a little blotchy in the past as far as I am concerned. He's more of a Superjet and freestyle guy. I don't want really to change anything on this ski, just finish what was started.

MrSki

I don't understand the comment on dual 38's dropping into the intake track.

Dual 44's are fine for this cylinder. My PJS t-3 motor runs dual 46's. Also has SST 440 afterburner pump, Al driveshaft, total loss, 20 pitch prop. Power hits hard from bottom to top over 8,500 RPM.

Attached Images

P1010006.JPG (394.6 KB, 75 views)

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1995 PJS VHP7000, stock but darn fun.
1992 550 SX - R&R port Kawi Reed, Kind of fast.
1989 JS 550 - PJS motor Dual 46's, 50 MPH on GPS.
1986 JS 550 - Pile of parts at the moment.
1976 JS 400 - Pretty much just a shell.

87kawi650sx

Thats one sick 550 MrSki....rowdy, do you have any pics of your westcoast ski? I'd love to see it!

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Bar Tab

harry goatcher's pro mod ski.

post #39

rowdy925

Yes I do have pics I will put some up in a little bit. The carbs are smaller than the intake tracts so they hang over when you look in from the reed side of the manifold. I dont want to change anything on this ski other than what might have been changed through the years as it changed hands. trying to keep it original...as if it would have came from the west coast race effort back when it first sold.

MrSki

If the carb opening is smaller than the intake manifold opening, that is OK.

This boat never "first sold". It was built by the westcoast race team and given to Harry...maybe he had some skin in it.

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1995 PJS VHP7000, stock but darn fun.
1992 550 SX - R&R port Kawi Reed, Kind of fast.
1989 JS 550 - PJS motor Dual 46's, 50 MPH on GPS.
1986 JS 550 - Pile of parts at the moment.
1976 JS 400 - Pretty much just a shell.