rocket goldstar

[trevinoz]

Alan,
          The ozzie RGSs were touring spec. I reckon they look better than the clubman. much neater than the ugly Goldie headlight brackets and naked forks.
Trev.

[alanp]

Alan,
          The ozzie RGSs were touring spec. I reckon they look better than the clubman. much neater than the ugly Goldie headlight brackets and naked forks.
Trev.

I agree the headlamp area looks better without the Goldie brackets. In fact my Goldie in the late '50s was converted over to get rid of the brackets. Not considered good form to do this to a Goldie in those days though.
Can you recall which silencer was fitted on the ozzie RGS versions?
Alan

[Flatboy 1950]

Hi Chaps , There is a Rocket Gold Star for sale here in S.A.
Engine # DA10R8418.
Frame # GA10.921
 Although it is not a barnfind , it is on this website  www.barnfinds.co.za
Price is just below 12,000 pounds ....
There is also a DB34 GS for sale too.

Regards , Flatboy.

[alanp]

It's interesting that he has priced the RGS the same as the DBD34.

[trevinoz]

Alan,
             My RGS had the cigar muffler as did the other two that I knew of.
I suspect that this was standard on all of them as the "goldie" muffler was listed as an optional "track silencer", I would imagine it was not acceptable to the "authorities".
When I restored mine back in the 80s, I had a goldie muffler made as I liked the look.
Now that everyone has one, I have now got an original shape one for the next go around.
My friend has also fitted the original to his RGS. Sounds better than the goldie one but no twitter.
I don't know whether the factory RGS goldie mufflers twittered but the ones made here certainly did.

  Trev.

[bsa-bill]

I don't know whether the factory RGS goldie mufflers twittered

Mine don't and it's almost  RGS engine spec.
I was told by a Goldie owner the twitter is down to valve overlap on the single, doesn't appear the same on a twin

[alanp]

I don't know whether the factory RGS goldie mufflers twittered

Mine don't and it's almost  RGS engine spec.
I was told by a Goldie owner the twitter is down to valve overlap on the single, doesn't appear the same on a twin

Funny you should mention that but a mate of mine with a Goldie didn't have the twitter but his Royal Oilfield fitted with a Goldie silencer did. He swopped them over and now his Goldie twitters and his RE doesn't. There's clearly more to it than just valve overlap it seems.
We investigated, as you do, and found differences with the internals between the two silencers. They both had the perforated tube running offset down the side taper but varied at the exhaust end of the tube. We can't recall where the one that twitters came from.
One of my RGS silencers, the one from Cake Street Classics, has a perforated short tube concentric with the silencer bore which doesn't reach the end of the body as far as the two just mentioned and another I've just tried on the RGS has a perforated tube running centrally right to the end. Neither of these has any hint of a twitter.
That's 4 different internals for a start. I'll start a topic in 'technical' to see if anyone knows who sells Goldie silencers which twitter.
Alan

[trevinoz]

The twitter is created by the internal arrangement of the baffles.
A Mate of mine has perfected the method. He made my muffler.
  Trev.

[alanp]

The twitter is created by the internal arrangement of the baffles.
A Mate of mine has perfected the method. He made my muffler.
  Trev.

Trev, this confirms our result that it's primarily silencer design, any chance of a description/sketch or anything from your mate which would point us in the right direction? My friends Goldie silencer from off his RE which twitters is too difficult to see inside with any certainty and we don't want to cut it up since we don't know where it was bought to get a replacement, but it's generally described as I mentioned above.
Alan