Author Topic: A10 RGS alloy cilinderhead  (Read 2078 times)

Online Beeza

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Re: A10 RGS alloy cilinderhead
« Reply #15 on: 30.11. 2014 11:07 »
Marc there are two types of manifolds available, there is a billet set you can buy (left manifold) fits the head port and carb inlet size very well and also has a sort of swirl machined in it to aid fuel air flow. Or the cast type (right manifold) which doesn't match either very well, the GP is a bit bigger diameter than the manifold and quite a bit more pricey.
Also a pic of the business side of it all.
Good luck

Thomas

Offline lillygunny

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Re: A10 RGS alloy cilinderhead
« Reply #16 on: 11.01. 2015 01:48 »
Mike Duckworth writes in "Classic Bike" March 1989, that the RGS had a single Amal Monobloc with optional air filter. The engine numbers have the DA10R prefix, with HHC stamped below the number designating the 8.75:1 high compression engine.

Offline Rgs-Bill

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Re: A10 RGS alloy cilinderhead
« Reply #17 on: 11.01. 2015 20:01 »
The RGS had a normal cast (single carb) manifold head. Your head would be of the batch that was made for the American racing market.
No it's worth nothing, I'll take it  >:D;). The last one I saw on Ebay went for $500 US I think.
If you are building an RGS replica/lookalike, that head would give it that bit more bling.
Cheers

   The twin carb heads must have come down if you say you saw an e-bay one for $500. U S,    U sure that was not  some other currency, I saw one in U S on Flea Bay it went for $1400.00 U S funds   been several years ago though  ??
U S of A
N.W. Corner, Seattle 
1962 RGS
78 YEARS OLD
Still Kick Starting My Motor (9 TO 1)
Although getting a bit tougher to do ! !

Offline duTch

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Re: A10 RGS alloy cilinderhead
« Reply #18 on: 11.01. 2015 21:38 »

  I would call a head with removable manifold(s) a' twin-port' until the addition of the desired inlet tract(s)/carbie configuration, then it can be a single or twin carb jobbie.....?
Started building in about 1977/8 a on average '52 A10 -built from bits 'n pieces never resto intended -maybe 'personalised'
Have a '74 850T Moto Guzzi since '92-best thing I ever bought doesn't need a kickstart 'cos it bump starts sooooooooo(mostly) easy
Australia

Offline muskrat

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Re: A10 RGS alloy cilinderhead
« Reply #19 on: 12.01. 2015 01:12 »
G'day duTch, you are technically correct. I may be wrong but I think they only left the factory on a bike in '54. From then on only sold to the racers and go fast crew, mainly in the US.
Cheers
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
Australia
Muskys Plunger A7

Offline duTch

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Re: A10 RGS alloy cilinderhead
« Reply #20 on: 12.01. 2015 11:31 »

 Yo Musky, I guess I was thinking generically as other makes (weird jappo stuff that my youngster turns up with)have singles with twin-port heads and two carbs, and non-bonny Trihards have bolt ons with splayed in-tracts (Daytona)..all can get a bit confusing unless we have some kind of standard terminology
Started building in about 1977/8 a on average '52 A10 -built from bits 'n pieces never resto intended -maybe 'personalised'
Have a '74 850T Moto Guzzi since '92-best thing I ever bought doesn't need a kickstart 'cos it bump starts sooooooooo(mostly) easy
Australia

Offline muskrat

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'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
Australia
Muskys Plunger A7