550/440

Just as the title says... can this head be saved?

Attached Images

	750sx 014.JPG (1.50 MB, 48 views)
	750sx 015.JPG (1.22 MB, 32 views)

__________________
1991 550sx, 1993 750sx, 1993 750sx (Wife's ski), 1998STX, 1994 Waveblaster, 1983 550

Big thanks to Newmiller Machine in Oregon for the great work! (Mcn6 on PWCtoday)

"The number of ways of playing footsie with detonation is endless, but nothing works every time. This guarantees that we will never be bored, and will never run out of seized pistons. " - Kevin Cameron

Twinturbostang

I have a 650 that looks just as bad. I was wondering the same thing.

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I sell drugs to support my Ski addiction

bkoche

How much of the piston was missing? A good welding shop should be able to fill in the deep gouges and reshape the damaged dome

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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

Group K

If that were a stock head, I would say "no problem at all" to fix it via machining. We often get stock heads that look like this (and worse). After we do our standard milling and squish cut, 95% of the visable damage is removed. In some cases there are still a few remaining indentations, but they are of no concequence to performance or reliability. That machining mod normally runs $90.

All that said, there are some "aftermarket" heads that were cast with much less excess material to allow for that kind of repair (the Ocean Pro heads were the worst in this regard). PJS had more than one casting they used for their heads, so we would have to examine the casting to make sure it has enough casting mass to tolerate the machining repair.

Respectfully, Harry Klemm

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Unless otherwise stated, responses to all forum posts are based on my personal experiences working within the PWC industry, and developing high performance PWCs since 1987.

www.groupk.com

550/440

OK, I have a stock head, would the stock head (after milling and squish cut) be as good as the PJS head in terms of performance?

__________________
1991 550sx, 1993 750sx, 1993 750sx (Wife's ski), 1998STX, 1994 Waveblaster, 1983 550

Big thanks to Newmiller Machine in Oregon for the great work! (Mcn6 on PWCtoday)

"The number of ways of playing footsie with detonation is endless, but nothing works every time. This guarantees that we will never be bored, and will never run out of seized pistons. " - Kevin Cameron

Randy11023

YA it is fine just be sure you get all ruff edges smooth. Dremel tool work great at this!