G5 Ignition Timing

Information relating to the Matchless G5 or AJS Model 8 350cc Lightweight
Locked
bike63
Member
Posts: 32
Joined: Sun Mar 29, 2020 11:37 am
Location: Hertfordshire UK

G5 Ignition Timing

Post by bike63 »

Hi, The user manual appears to say that with the piston at 1/4 inch before top of firing stroke the contact points should be just about to open when the bob weights are held open to simulate maximum advance. This seems odd to me as I thought the function of the automatic advance bob weights was to provide advanced ignition when the engine was spinning fast. Any comments anybody ?
Cheers,
John.
User avatar
clive
Member
Posts: 5657
Joined: Mon Jan 01, 1990 12:00 am
Location: LONDON UK

Re: G5 Ignition Timing

Post by clive »

you set the timing at fully advanced despite the engine being stationary. If not when you start the engine it will be over advanced. Same with any model with auto advance, well actually you set manual advance at full advance too.
clive
if it ain't broke don't fix
bike63
Member
Posts: 32
Joined: Sun Mar 29, 2020 11:37 am
Location: Hertfordshire UK

Re: G5 Ignition Timing

Post by bike63 »

Thanks Clive .. obvious now you've explained it to me.
John
Locked