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Old 07-06-2008   #1 (permalink)
New Member
Newbie
Favorite Bike: '63 6T
 
Join Date: Jun 2008
Location: RSM, California
Posts: 5
Other Motorcycle: YZ400F 'Dual Sports'
AMAL Carb : 689/205 Carb vs 376 series.

Am new to this forum and to classic Triumphs. I'm English, living in CA, so I thought I find myself a piece of history! Bought a '63 Thunderbird that seems to be a bit of a hybrid. Has a mix of T'bird and Trophy parts. Still it's in great shape and I love riding it...

The carb on the bike now is a 689/205 Amal. The parts list for the '63 650s says type 376. Any ideas what the 689 is from? Should I bother chasing down the original carb?

Thanks for you help.
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Old 07-06-2008   #2 (permalink)
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Favorite Bike: 1970 T120R(unrestored)
 
Join Date: Aug 2005
Location: Marysville,Pa
Posts: 490
Other Motorcycle: 2002 Bonneville
Extra Motorcycle: 1970 T120R(restored)
Why bother? If it's running well it's not worth risking poor performance from another carb that might be original to the bike but not perform as well.
Just my two pennies worth!
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Old 07-07-2008   #3 (permalink)
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Grand Prix 125
Favorite Bike: 1956 Triumph TR6 Trophy
 
Join Date: May 2008
Posts: 23
My 56 TR6 also said 376 stock but has a 389/22 on it right now, which is quite a bit bigger carb. The 689 is the opposite of a 389 on dual carb setups. My bike was a race bike in the mojave dessert back some 40 years ago and so im sure that the 689 was put on your bike for better performance.
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Old 07-08-2008   #4 (permalink)
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Favorite Bike: '63 6T
 
Join Date: Jun 2008
Location: RSM, California
Posts: 5
Other Motorcycle: YZ400F 'Dual Sports'
Hey, thanks appreciate it.
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