Thread: R&D Cast Head
02-08-2013, 01:50 PM #1
R&D Cast Head
Has anybody used a R&D head on a gp1200? Does it use an o-ring and a gasket? R&D is closed till monday so I thought someone on here might know. The pics show a groove around the dome but not around the water jackets. Also what would the compression be with 37cc dome?
02-08-2013, 09:21 PM #2
37cc on a stock port GP1200 should give you 165 to 170psi. A ported cylinder will probably drop that down to 150 to 160 psi range I bet.
I thought the R&D heads were all oring sealed but not sure
02-08-2013, 09:27 PM #3
- Join Date
- Aug 2011
02-09-2013, 01:46 PM #4
02-09-2013, 02:03 PM #5
With the ported cylinders and the high elevation you ride at, you might be able to get away without race gas...maybe.
02-09-2013, 02:33 PM #6
I'm hoping it will be about 150 PSI. The porting brought my milled head down to 126 PSI. Once I get the compression checked I will post about carb settings.
By the looks of it I think it uses a special gasket besides the o-rings.
02-11-2013, 10:57 AM #7
Just got off the phone with R&D. Turns out it uses o-rings around the cylinder and liquid gasket maker around the water jackets. That's easy enough. This head plus some boyesen pro reeds should boost power.
Last edited by Budman; 02-11-2013 at 05:06 PM.
02-11-2013, 06:39 PM #8
02-12-2013, 05:47 PM #9
Just scored some riva sponsons on ebay for $35.00 shipped. Not bad. Oh spring time where are you?
02-18-2013, 09:20 PM #10
They may look nice but the OEM head actually cools better than aftermarket billet heads..I would stick with the OEM and have it re-milled and squished for rec riding. You can run 93 octane and 170 lbs. of cranking pressure and be ok. Send it to Woody or Lowell for the machine work and your ski will be better off in the long run. The O-rings can be a pain to deal with at times.
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