A lucky accident

Information relating to the Matchless G12 or AJS Model 31 650cc twin
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mjf65
Member
Posts: 113
Joined: Wed Oct 03, 2018 2:07 pm
Location: United Kingdom

A lucky accident

Post by mjf65 »

After an oil change last week I took the bike up the road just to get the engine hot and get the oil level correct. I hadn't gone far before the speedometer packed up and the bike didn't feel right? I stopped and noticed that the speedo gearbox was at a strange angle? Anyway I turned around and nursed it home and got it up on the stand, the locking ring had backed off and the locking ring had moved a couple of threads out. After pulling the speedo gearbox out it was locking up and then freeing off due to excess wear in the bore of the gear wheel causing it to jam up with the worm gear, plenty of grease in there but basically it's worn out. Fortunately the only component damaged was the oil seal due to the bearing de-loading. I think I was lucky getting away with that one.
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