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91
British Bikes / Re: AJS 16M 1951
« Last post by R on July 23, 2025, 10:39:52 PM »
Have you tried turning the engine/gearbox over, via the back wheel. ?
And seeing if that makes any difference.

It sounds like the kickstarter is not meshed or located correctly.
Let me find the Ajay booklet to refresh the grey cells, if someone doesn't chime in sooner.
92
British Bikes / Re: AJS 16M 1951
« Last post by dynamic on July 23, 2025, 03:05:55 PM »
kickstart has now decided to jam in upright position will not engage its solid just about an inch movement down before going solid ,it does spring back to resting position

anyone experiensed this at vall ?
93
British Bikes / Re: AJS 16M 1951
« Last post by dynamic on July 23, 2025, 12:37:54 PM »
FINALLY STARTED before I was not allowing for gear backlash only setting to 7/16 BTDC, going further back then coming up to my gauge mark made all the difference

thanks to all who posted sound advice .
94
British Bikes / Re: AJS 16M 1951
« Last post by R on July 23, 2025, 11:01:38 AM »
Good call. ?
On a twin, you'd just swap the plug leads over.

But 4 stroke singles don't work like that.
95
British Bikes / Re: AJS 16M 1951
« Last post by cardan on July 23, 2025, 04:55:25 AM »
Double check that you have set the spark on the firing stroke, when both valves are closed.

Leon
96
British Bikes / Re: AJS 16M 1951
« Last post by R on July 22, 2025, 11:54:58 PM »
then WIND forward

Aye, if all ye backlashes accumulate, then you may be in no mans land....

Lightly tapping the sprocket onto its taper is highly recommended,
or it may slip or move while you are tightening up the nut.
97
British Bikes / Re: AJS 16M 1951
« Last post by Rex on July 22, 2025, 08:08:41 PM »
Grandma's eggs here, but you should wind the engine backwards a lot further, then winD forward until the timing point is reached. otherwise the lash in the gears will throw your timing out.
I usually start my bikes on just a little retard (rather than half) but all bikes are different and yours might need more retard.
98
British Bikes / Re: AJS 16M 1951
« Last post by dynamic on July 22, 2025, 11:59:30 AM »
I was carefull not to disturb crank or timing/cam sprockets ,I did wipe the mag shaft before replacing the sprocket maybe I disturbed the timing then ,
I have set the piston full advance (lever slack cable) at TDC then back 7/16 BTDC watching for the points to just start opening before replacing mag sprocket ,
I am getting a bang back through the carb ,I have the advance /retard at mid way point
if anyone could help me to re time motor I would be very gratefull
99
British Bikes / Re: AJS 16M 1951
« Last post by Vreagh on July 22, 2025, 09:19:36 AM »
Is it possible the crank moved while working on the gasket?
100
British Bikes / Re: AJS 16M 1951
« Last post by dynamic on July 22, 2025, 08:36:48 AM »
yes a piece of "debris" inpregnated into the gasket , now I have a non starting machine, before I took the cover off I marked mag /crank sprockets lining up to the marks I put on the timing case
I feel sure I put back both sprockets as they were when the bike ran earlier in the day before I removed the sprockets /casing 
 I have checked many times the points just starting to open at 7/16 /12mm BTDC then fully open at 12thou just before TDC if anybody could post re timing engine /magneto I would be very grateful  thank you
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