G9 crankcase "catastrophic" failure

Information relating to the Matchless G9 or AJS Model 20 500cc twin
Johnobirches
Member
Posts: 155
Joined: Mon Jul 08, 2013 10:19 am
Location: Lancs. UK

Re: G9 crankcase "catastrophic" failure

Post by Johnobirches »

Good point Mick.
jp
Posts: 4
Joined: Tue Aug 16, 2016 12:04 pm
Location: BELGIUM BELGIUM

Re: G9 crankcase "catastrophic" failure

Post by jp »

Thank you everyone for the feedback.

The spacer between bearing and sprocket was in place and the chain did not chew anything, so that's not it.

We're not opening the cases before finding a replacement, so I can't comment on the bearing width or thrust washers
suggestions, but we'll keep it in mind. As was said, the "Look Ma, no rollers !" trick is probably where we should stop
asking ourselves deep questions !

While looking for info I came across this site: http://archives.jampot.dk/
It looks like a real gold mine of AJS/Matchless documentation, so I'm posting it here in case not everyone is aware of it.

Thanks again, JP
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