Fuel consumption

Information relating to the Matchless G12 or AJS Model 31 650cc twin
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eric650
Posts: 5
Joined: Mon Jan 01, 2001 12:00 am
Location: CUMBRIA UK

Fuel consumption

Post by eric650 »

Just wondering what kind of mpg people are getting from their 650 twins I'm using an Amal monobloc carb and I'm only getting about 40 mpg I've had the bike from new so you'd think I'd know but if I did I've forgotten!
ian_5931
Posts: 6
Joined: Tue May 09, 2017 10:30 pm
Location: England

Re: Fuel consumption

Post by ian_5931 »

Low 50's. Think it should be better....
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Rob Harknett
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Joined: Mon Jan 01, 1990 12:00 am
Location: ESSEX UK

Re: Fuel consumption

Post by Rob Harknett »

It would depend on a run. Short runs in town or countryside, up hills round bends forever changing gears, Stopping and starting at junctions etc. Will only get the lowest MPG. This could rise as much as 50% on a longer run along a good road. I can see this on my car which shows MPG at any time. I believe my car average is 32 MPG but I can average 45 on a long motorway drive. About 25 average in town or country lane short runs.
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1608
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Joined: Mon Oct 05, 2009 1:00 am
Location: ESSEX UK

Re: Fuel consumption

Post by 1608 »

I only take note of the mpg on good runs and rallies when one would expect the optimum mpg anyway. I get about 60 mpg on my G12 keeping a steady 50 mph'ish.
MikeM.
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Posts: 1906
Joined: Wed Jan 01, 1992 12:00 am
Location: SURREY UK

Re: Fuel consumption

Post by MikeM. »

My old Model 31 turns out about 60 to 65 mpg depending on whether I am on long or short rides and of course what speed I am doing. on a 160 mile trip to Hay on Wye earlier this year I managed around 65 mpg riding between 55 and 60 mph.
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Rob Harknett
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Joined: Mon Jan 01, 1990 12:00 am
Location: ESSEX UK

Re: Fuel consumption

Post by Rob Harknett »

I read in a road test, over several 100 miles a G12CSR average was 51 MPG that was when the bike was new.
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