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#710662 - 10/06/17 12:33 am Triple standard carby size  
Joined: Feb 2015
Posts: 253
Steven A Offline
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Steven A  Offline
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Joined: Feb 2015
Posts: 253
Melbourne Oz
Hi All,

I notice that aftermarket carby alternatives for our triples are the 26mm Mikuni and Keihins. However aren't the standard Amals 27mm?

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#710703 - 10/06/17 1:18 pm Re: Triple standard carby size [Re: Steven A]  
Joined: Jun 2002
Posts: 9,212
Stuart Online content
BritBike Forum member
Stuart  Online Content
BritBike Forum member

Joined: Jun 2002
Posts: 9,212
Scotland
Hi Steven,

Standard Concentrics for triples were bored to 27 mm. - you'll always find "626" cast on the bodies. I don't think there were ever any 27 mm. slide Mikunis or Keihins, so you'd have to bore 26 mm. ones of those?

Hth.

Regards,

#710740 - 10/06/17 10:33 pm Re: Triple standard carby size [Re: Steven A]  
Joined: Mar 2006
Posts: 1,132
htown Online content
BritBike Forum member
htown  Online Content
BritBike Forum member

Joined: Mar 2006
Posts: 1,132
Magnolia, TX
Just put on a new set of AMAL Premiers and very happy with them. Much easier to start with the factory jetting on the Amals and dial them in than starting from scratch with and after-market carb.


1978 Bonneville T140E
1974 Trident
1970 BSA Thunderbolt
1971 Norton Commando
1972 Norton Commando
2-1974 Norton Commandos
2004 XL 1200R Sportster

Everything will be alright in the end. If its not alright, its not the end.
#710746 - 10/06/17 11:08 pm Re: Triple standard carby size [Re: htown]  
Joined: Feb 2015
Posts: 253
Steven A Offline
BritBike Forum member
Steven A  Offline
BritBike Forum member

Joined: Feb 2015
Posts: 253
Melbourne Oz
Originally Posted by htown
Just put on a new set of Amal Premiers and very happy with them. Much easier to start with the factory jetting on the Amals and dial them in than starting from scratch with and after-market carb.


I have one of these.

http://www.innovatemotorsports.com/products/lm2.php

so I don't fear some messing about.


Last edited by Steven A; 10/06/17 11:20 pm.
#710753 - 10/07/17 12:47 am Re: Triple standard carby size [Re: Steven A]  
Joined: Apr 2005
Posts: 1,564
Adam M. Online content
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Adam M.  Online Content
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Joined: Apr 2005
Posts: 1,564
Mississauga, Ontario.
Mine starts from first kick every time on original slightly used Amals and keeps nice idle.

#710755 - 10/07/17 12:54 am Re: Triple standard carby size [Re: Steven A]  
Joined: Mar 2006
Posts: 1,132
htown Online content
BritBike Forum member
htown  Online Content
BritBike Forum member

Joined: Mar 2006
Posts: 1,132
Magnolia, TX
I have a screw driver and my bikes run fine with new Amals.

Last edited by htown; 10/07/17 12:55 am.

1978 Bonneville T140E
1974 Trident
1970 BSA Thunderbolt
1971 Norton Commando
1972 Norton Commando
2-1974 Norton Commandos
2004 XL 1200R Sportster

Everything will be alright in the end. If its not alright, its not the end.
#710759 - 10/07/17 3:02 am Re: Triple standard carby size [Re: Steven A]  
Joined: Jun 2014
Posts: 63
Bodie Online content
BritBike Forum member
Bodie  Online Content
BritBike Forum member

Joined: Jun 2014
Posts: 63
Austraaalya
I've got a Gunson Colortune kit and a screwdriver .. What's a new AMAL Premier ?? grin

#711142 - 10/10/17 8:58 pm Re: Triple standard carby size [Re: Steven A]  
Joined: Feb 2012
Posts: 272
Peter Gascoigne Offline
BritBike Forum member
Peter Gascoigne  Offline
BritBike Forum member

Joined: Feb 2012
Posts: 272
Southampton UK
I bought a pair of Mikuni VMs for my BSA A65 from here ready jetted. I'm very pleased with them. When funds allow I'm going to get a set for my T150.

http://www.allensperformance.co.uk/carb-kit/carb-kit-listings/


1971 BSA A65 Lightning "Bitsa"
1966 BSA A65 "Beezuki" with GT550 two-stroke engine
1974 Triumph T150 830cc
1975 Suzuki GT550
1975 Laverda 1000 3C
1986 Yamaha SRX 600
#711276 - 10/12/17 2:04 am Re: Triple standard carby size [Re: Peter Gascoigne]  
Joined: Feb 2015
Posts: 253
Steven A Offline
BritBike Forum member
Steven A  Offline
BritBike Forum member

Joined: Feb 2015
Posts: 253
Melbourne Oz
Originally Posted by Peter Gascoigne
I bought a pair of Mikuni VMs for my BSA A65 from here ready jetted. I'm very pleased with them. When funds allow I'm going to get a set for my T150.

http://www.allensperformance.co.uk/carb-kit/carb-kit-listings/


You will be facing the decision I have to make. Drop from 27mm to a VM26 or go up to a VM28.

Does it matter much? It would be interesting to find out.


Moderated by  Mike Carter 


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