Model 30 spark plugs

Information relating to the Matchless G11 or AJS Model 30 600cc twin
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geronimo
Posts: 7
Joined: Wed Oct 12, 2005 10:45 pm
Location: DORSET UK

Model 30 spark plugs

Post by geronimo »

My recently acquired model 30, which seems to run OK, i srunning two different plugs, b5es one side and b8es the other. They don't look the same colour wise!

Can anyone suggest why they may be like this, or tell me what it should be running please?

Phil
Rohan B.
Posts: 136
Joined: Wed Oct 12, 2005 10:45 pm
Location: AUSTRALIA

Model 30 spark plugs

Post by Rohan B. »

There was some chat recently on the Ajay/matchy list about plugs. B8ES is a cool running highway plug, and B5ES is a warm around town plug. Sounds like someone didn't notice the different numbers - or used what was to hand !!! Or maybe the B5ES cylinder is burning oil, is low on compression or has a weak spark on that side, and a warmer plug was fitted to counteract this (you did mention different plug colours)

Since the B8ES plug is satisfactory, be worth trying a pair of these, and check the colour after a good run. Take the B5ES along as a spare, just in case its in there for a reason....

hopethishelps, aren'toldbikesfun !!
Rohan.
geronimo
Posts: 7
Joined: Wed Oct 12, 2005 10:45 pm
Location: DORSET UK

Model 30 spark plugs

Post by geronimo »

Rohan

thans for the repsonse. I put some champion 5's in and they seemed to run fine and coloured up OK. Then a head gasket blew, fun!!

Phil
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