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Amal 10TT9 (1 3/16") carb- Vincent Black Lightning? Goldstar? #245503
03/29/09 2:02 am
03/29/09 2:02 am
Joined: May 2007
Posts: 89
San Diego
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lurkingclass Offline OP
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lurkingclass  Offline OP
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San Diego
I just got this carb, and I'm trying to ID it and find jetting info. It's 1 3/16" all the way through, no taper, and has a short bellmouth (like the Vincents) All I can come up with is a few books that reference it for use on early Vincent Black Lightnings and BSA Goldstars. Would it be an appropriate carb for a mildly built Triumph 650 with a single carb head? Any idea what kind of jet to start with? It's got a 370 main jet and a #6 slide. I know it's going to be trial and error, but I was hoping someone had some experience running one of these on a Triumph and could enlighten me on TT and GP carbs.


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Re: Amal 10TT9 (1 3/16") carb- Vincent Black Lightning? Goldstar? [Re: lurkingclass] #245506
03/29/09 2:20 am
03/29/09 2:20 am
Joined: Oct 2004
Posts: 4,429
Melbourne Australia
Tiger Offline
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Tiger  Offline
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Melbourne Australia
I have ridden both a Goldie and a Velo Thruxton fitted with GP carbs, both excercises reinforced the carbs reputation of being not so easy to start and idling being pretty much nonexistent.

If the GP is in good nick maybe put it on Fleabay, folks who must have original pay significant money for GPs.


1969 TR6R
7.62 x 51 is not a maths puzzle.
Re: Amal 10TT9 (1 3/16") carb- Vincent Black Lightning? Goldstar? [Re: Tiger] #245514
03/29/09 3:33 am
03/29/09 3:33 am
Joined: May 2007
Posts: 89
San Diego
L
lurkingclass Offline OP
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lurkingclass  Offline OP
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Posts: 89
San Diego
What exactly is it that makes them hard to start and not idle? What is the benefit of this carb vs. say, a 930? Is there any books or manuals out there that cover these carbs? Thanks.

Re: Amal 10TT9 (1 3/16") carb- Vincent Black Lightning? Goldstar? [Re: lurkingclass] #245613
03/30/09 12:42 am
03/30/09 12:42 am
Joined: Mar 2005
Posts: 82
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beagleplex Offline
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Some of the BSA A10's had those and would be similar jetting to your Triumph. Why not give it a try?

Re: Amal 10TT9 (1 3/16") carb- Vincent Black Lightning? Goldstar? [Re: beagleplex] #245865
03/31/09 1:34 pm
03/31/09 1:34 pm
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Posts: 731
Asheville, North Carolina
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ca7a Offline
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ca7a  Offline
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Asheville, North Carolina
First off, this is a TT carb, not a GP. As such, it has an idle circuit and is more tractable than the GP.
The 1960 BSA Super Rocket and Spitfire were both fitted with a 1-5/32" TT9, using a 410 main jet, a 7 slide, and the jet needle in the 4 position. A .109 needle jet was used. The slide and jet you have are enough to get started with.
David

Re: Amal 10TT9 (1 3/16") carb- Vincent Black Lightning? Goldstar? [Re: ca7a] #245922
03/31/09 7:43 pm
03/31/09 7:43 pm
Joined: Apr 2006
Posts: 1,397
New Zealand
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johnm Offline
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New Zealand
If it works- and most times it doesnt - these links should take you to GP and TT specification sheets which are on Panics (Victory library) website

http://victorylibrary.com/brit/TT-c.htm

http://victorylibrary.com/brit/GP-c.htm

Re: Amal 10TT9 (1 3/16") carb- Vincent Black Lightning? Goldstar? [Re: johnm] #246162
04/02/09 2:40 am
04/02/09 2:40 am
Joined: May 2007
Posts: 89
San Diego
L
lurkingclass Offline OP
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lurkingclass  Offline OP
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Joined: May 2007
Posts: 89
San Diego
That's some really great info- thanks. I saved the all those pages. I just happened to pick up a "Tuning for Speed" by PE Irving from the 60's and it has all kinds of info on the TT and GP carbs too. It seems like a pretty good carb, but the choke is missing. Should I try to hunt one down?

Re: Amal 10TT9 (1 3/16") carb- Vincent Black Lightning? Goldstar? [Re: lurkingclass] #246172
04/02/09 3:23 am
04/02/09 3:23 am
Joined: Aug 2001
Posts: 1,875
California
Ron - in California R.I.P. Offline
In Remembrance
Ron - in California R.I.P.  Offline
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Posts: 1,875
California
Both the GP and TT carbs have an idle circuit with a low speed mixture screw. They do NOT have a throttle stop as they are considered racing carbs. The rules in that day required that the engine to stop running when the throttle was closed. Making either of these carbs idle is simple, by either drilling a small hole in the slide or filing a notch.

OK, a number 7 side is VERY lean, which suggests this carb was used with a megaphone, a richer slide would be needed for use with a silencer.

Most starting problems were either operator error or ignition related.

Cheers..!!

Ron


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