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Carburettor Top adjusters :Mono vs Concentric #696319
05/24/17 6:45 am
05/24/17 6:45 am
Joined: Jan 2014
Posts: 351
Geneva, Switzerland
BrettF Online content OP
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BrettF  Online Content OP
BritBike Forum member
Joined: Jan 2014
Posts: 351
Geneva, Switzerland
Hi Folks,

For the Mk1 concentrics (on the T120) I know that the consensus is to remove the adjusters that AMAL supplies on top of the carb (seemingly as standard) to ease cable routing and allow for correct cable usage.

Is this also the case for monoblocks? Ive got two adjusters on my 376 for the T110, should they also come out?

Thanks

Brett

Last edited by BrettF; 05/24/17 10:32 am.

3D TV: A format that lost a format war without even having an opponent.
Bikes:
69 T120 on average (1967 rolling frame and 1971 Bonnie engine)
57 T110 on average (58 rolling frame - with 55 iron head engine)
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Re: Carburettor Top adjusters :Mono vs Concentric [Re: BrettF] #696333
05/24/17 9:17 am
05/24/17 9:17 am
Joined: Mar 2006
Posts: 3,490
Norfolk, UK
L.A.B. Online content
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L.A.B.  Online Content
BritBike Forum member
Joined: Mar 2006
Posts: 3,490
Norfolk, UK
Originally Posted by BrettF
For the Mk1 concentrics I know that the consensus is to remove the adjusters that Amal supplies on top of the carb (seemingly as standard) to ease cable routing and allow for correct cable usage.


Any consensus is news to me! Not all 'standard' AMAL carb tops have (either one or two) screw adjusters.


Originally Posted by BrettF
Is this also the case for monoblocks? Ive got two adjusters on my 376 for the T110, should they also come out?


So it's been like that for how many years? And now you think you need to change it?

Re: Carburettor Top adjusters :Mono vs Concentric [Re: BrettF] #696335
05/24/17 9:58 am
05/24/17 9:58 am
Joined: Sep 2001
Posts: 362
Great Southern Land
tridentt150v Offline
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tridentt150v  Offline
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Posts: 362
Great Southern Land
I'd say that you would do that if you wanted more water to leak into your carburettor smile. personally never heard of it and never done it.

Smoke on the Water???

Re: Carburettor Top adjusters :Mono vs Concentric [Re: BrettF] #696340
05/24/17 10:59 am
05/24/17 10:59 am
Joined: Jan 2014
Posts: 351
Geneva, Switzerland
BrettF Online content OP
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BrettF  Online Content OP
BritBike Forum member
Joined: Jan 2014
Posts: 351
Geneva, Switzerland
Hi folks (added "T120" to the original post to clarify - apologies ). When I fitted new cables to my 69 t120 could not get them to fit. After lots of discussions it was told by a few sources that the top adjusters should not be there. Removing them also greatly relaxed the cable curvature under the big home market tank. I assumed that there was a consensus as this recommendation was echoed many times including by Mike at Walridges and John Healy in this this thread. Is this not correct?

Regarding the T110 I see that the cables Ace Classics supplied me have the adjusters inline and a preliminary fit seems to indicate that they don't want the top adjusters either (outer will be too long -or the inner too short -depending in which you prefer ;-)). The new carb ordered for the T110 has the two adjusters on top. I was just wandering which way there were originally, I have spare tops so easy to rectify.

Just to make sure : it seems that the consensus is the other way? Triumph T110 and T120s do have adjusters on the top of the carbs?

Regards

Brett

Last edited by BrettF; 05/24/17 11:03 am.

3D TV: A format that lost a format war without even having an opponent.
Bikes:
69 T120 on average (1967 rolling frame and 1971 Bonnie engine)
57 T110 on average (58 rolling frame - with 55 iron head engine)
Re: Carburettor Top adjusters :Mono vs Concentric [Re: BrettF] #696343
05/24/17 11:39 am
05/24/17 11:39 am
Joined: Mar 2006
Posts: 3,490
Norfolk, UK
L.A.B. Online content
BritBike Forum member
L.A.B.  Online Content
BritBike Forum member
Joined: Mar 2006
Posts: 3,490
Norfolk, UK
Originally Posted by BrettF
Hi folks (added "T120" to the original post to clarify - apologies ). When I fitted new cables to my 69 t120 could not get them to fit. After lots of discussions it was told by a few sources that the top adjusters should not be there. Removing them also greatly relaxed the cable curvature under the big home market tank. I assumed that there was a consensus as this recommendation was echoed many times including by Mike at Walridges. Is this not correct?



That is correct for a '69 T120. As a '69 T120 would normally have the inline adjusters and therefore the carb tops should be the 928/098 double 'ferrule' type without screw adjusters.

http://amalcarb.co.uk/mixing-chamber-top-to-fit-2-ferrules-7137.html



Originally Posted by BrettF
Regarding the T110 I see that the cables Ace Classics supplied me have the adjusters inline and a preliminary fit seems to indicate that they don't want the top adjusters either (outer will be too long -or the inner too short -depending in which you prefer ;-)). The new carb ordered for the T110 has the two adjusters on top. I was just wandering which way there were originally, I have spare tops so easy to rectify.


Which year T110?

Looking at the '53 list, the T110 carb top apparently had a screw adjuster for the throttle cable and a ferrule for the choke (air) cable. Other years could be different.

Re: Carburettor Top adjusters :Mono vs Concentric [Re: BrettF] #696348
05/24/17 12:49 pm
05/24/17 12:49 pm
Joined: Aug 2010
Posts: 588
Toronto, Canada
B
Bola Offline
BritBike Forum member
Bola  Offline
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B
Joined: Aug 2010
Posts: 588
Toronto, Canada
I recently went through the same mod. I fitted a 389 Monobloc to my 69 Tiger. The original adjusters went in the parts bin. I had to drill out the carb top with a 1/4" bit to accommodate the cables. No biggy. Functions great.

Re: Carburettor Top adjusters :Mono vs Concentric [Re: BrettF] #696444
05/25/17 7:33 am
05/25/17 7:33 am
Joined: Jan 2014
Posts: 351
Geneva, Switzerland
BrettF Online content OP
BritBike Forum member
BrettF  Online Content OP
BritBike Forum member
Joined: Jan 2014
Posts: 351
Geneva, Switzerland
Thanks for the info folks,

L.A.B. - its a 54/58, which "list" are you referring to - is it the parts lists? They all indicate (for all the years I've checked anyway) that -as you say - there is an adjuster on the top for the choke only.

If anyone knows for sure if that is correct please chime in. (I've lost a bit of faith in the parts books, especially the older pre-unit ones - that said my 2003 suzuki parts books had errors that cost me a week of head scratching and almost cost me the motor - if I did not have an oil pressure gauge attached on startup I'd probably have ended up pushing the bike into the Saint Lawrance on a dark and rainy night)

Cheers

BMF


3D TV: A format that lost a format war without even having an opponent.
Bikes:
69 T120 on average (1967 rolling frame and 1971 Bonnie engine)
57 T110 on average (58 rolling frame - with 55 iron head engine)

Moderated by  John Healy 


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