carb

Jalo · Post by **Jalo** » Tue Jun 14, 2011 10:16 pm

HI

I have a MATCHLESS G80 1952. I dont think the carburettor is the right one, so i wonder if someone knows; what is the correct carb for this engine??

itma · Post by **itma** » Tue Jun 14, 2011 10:41 pm

It would help if you said what you do have?

Duncan · Post by **Duncan** » Tue Jun 14, 2011 10:53 pm

Type 89B 1 3/32" for a 1952 G80.

Have a look "HERE" for a new one (and a shock!).

Edited because I put the wrong size in Edited by - Duncan on 14 Jun 2011 10:00:06 PM

Malleon · Post by **Malleon** » Tue Jun 14, 2011 10:53 pm

Hello Jalo,
Amal specify 89B/1AK, with the following :-
Internal Bore : 1 - 3/32 ins.
Main Jet ; 180
Needle Jet : 106
Needle Position : 3
Throttle Valve : 29/0624
Float Chamber : 1AK (3 degrees)

As described in the current Amal catalogue.
Best regards.Edited by - Malleon on 16 Jun 2011 12:09:32 AM

orbinrangle · Post by **orbinrangle** » Wed Jun 15, 2011 1:00 am

Mind you Jarle, the 89B/1AK is twice the price (nearly) of a Monobloc. Monoblocs are a tadge more reliable too. I bought a new Monobloc from Amal to suit my 1952 18S (there was a knackered Monobloc on the bike when I bought it) and it's been trouble free.

Rob Harknett · Post by **Rob Harknett** » Thu Jun 16, 2011 11:42 am

89B/1AK correct as stated by Amal.
By the way, I made excell files of carbs for all models, plus electrical parts, AJS & Matchless. post & prewar. They should be available on this website, perhaps for member access only.
Only brief details are given.
There are a few errors in the Amal doc. those I was aware of I corrected in my file. I would be happy to e mail the file on request via prewar@jampot.com

Jalo · Post by **Jalo** » Thu Jun 16, 2011 2:34 pm

Since my bike is far from original, it doesn't matter if the carb is a monoblock. So if it's half the price, i'll try get one of these.. But how about the setup? (needle size++) do anyone know what setup which is right for a monoblock-carburettor for this bike?? (-the cylinder is a tiny bit larger than original, maybe close to 550ccm?)

orbinrangle · Post by **orbinrangle** » Thu Jun 16, 2011 7:12 pm

Tell Amal what bike it's for and they'll send it ready to bolt on and ride away.