Petrol tank

Information relating to the Matchless G12 or AJS Model 31 650cc twin
Locked
petej64
Posts: 14
Joined: Fri Oct 19, 2012 2:36 pm
Location: MIDDX UK

Petrol tank

Post by petej64 »

Ive just got my first classic G12 1960 Delux.

Ive been looking over it and it has a fuel tap on both sides.

They both go to the carb but its not what the manual says.

I wondered if anyone has any ideas?

Pete
SPRIDDLER
Member
Posts: 8561
Joined: Wed Sep 01, 2004 1:00 am
Location: WEST SUSSEX UK

Petrol tank

Post by SPRIDDLER »

Not aware which manual you have but r/h side tap is normally the main supply and t'other is (normally) Reserve.......
'There is a tide in the affairs of men
Which taken at the flood............'
User avatar
saltbox alf
Deceased
Posts: 2201
Joined: Mon Oct 03, 2011 12:25 pm
Location: Aude, France

Petrol tank

Post by saltbox alf »

Yep, as far as I know two taps is correct. one is main feed and the other, the left one (correct me if I am wrong) is the reserve. The tunnel in the tank creates the reserve area at the rear of the tank. but it's a small amount of fuel that will be left as reserve so don't ride far!!
Allons-y, amis de Matchless et AJS
petert120r
Member
Posts: 437
Joined: Fri Jan 03, 2003 12:00 am
Location: POWYS UK

Petrol tank

Post by petert120r »

Your main tap should have a spigot (approx 1 1/2") protruding into the tank which prevents fuel flow when the level falls below this level.
The reserve has no spigot enabling you to use what remains.
User avatar
paul knapp
Posts: 1645
Joined: Wed Oct 12, 2005 10:45 pm
Location: SOUTH AUSTRALIA AUSTRALIA

Petrol tank

Post by paul knapp »

If that's correct Peter, how is the 1 1/2" deep fuel in the right side of tank going to be accessed due to the tank bottom being not flat?...as saltbox alf says.
___“As a hobby for the technically minded, motorcycling provides great scope.”

J.B.Nicholson

Don't worry about the world coming to an end today. It's already tomorrow in Australia!


_____________________________________________



petert120r
Member
Posts: 437
Joined: Fri Jan 03, 2003 12:00 am
Location: POWYS UK

Petrol tank

Post by petert120r »

It won't. The l/h reserve tap will access what remains on that side. The main tap ceasing to flow merely acts as a warning.
User avatar
paul knapp
Posts: 1645
Joined: Wed Oct 12, 2005 10:45 pm
Location: SOUTH AUSTRALIA AUSTRALIA

Petrol tank

Post by paul knapp »

...so that meens the bike has to be lain over on it's left side to get the remaining fuel from the R.H. side to drain over, but that would only be possible when the L.H. side reserve has been drained, otherwise there would be no room for the extra fuel!
___“As a hobby for the technically minded, motorcycling provides great scope.”

J.B.Nicholson

Don't worry about the world coming to an end today. It's already tomorrow in Australia!


_____________________________________________



User avatar
saltbox alf
Deceased
Posts: 2201
Joined: Mon Oct 03, 2011 12:25 pm
Location: Aude, France

Petrol tank

Post by saltbox alf »

Yes the joy of running out almost and doing the shaky shaky dance to get a few more miles of fuel from one side of tank to t'other.
Allons-y, amis de Matchless et AJS
Locked