Crankcase thread size/part no

Information relating to the Matchless G2 or AJS Model 14 250cc Lightweight
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ade
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Crankcase thread size/part no

Post by ade »

I haved searched the latest part no list for the Crankcase bolts and can find no mention at all. I can find a bolt kit listed on the site spares list of 900526 but seems to be nuts and bolts when it's bolts which I require. Also what's the thread size so I can buy a tap. ta
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cbranni
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Re: Crankcase thread size/part no

Post by cbranni »

I will check tomorrow but I think it's 5/16 bsf, but that is a guess
Colin
only dead fish go with the flow
ade
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Re: Crankcase thread size/part no

Post by ade »

thanks Colin. I have a 5/16 x 22 BSF tap but loath to try it until it's confirmed that this is the correct thread.
cbranni
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Re: Crankcase thread size/part no

Post by cbranni »

Looks like 5/16 BSF

042036 BOLT LONG 3 3/8" x 5/16 BSF............1off
042035 BOLT SHORT 2 5/8" x 5/16 BSF..........6 off

The bolts have reduced head, well the ones I have are.

Colin

PS

https://www.namrick.co.uk/acatalog/Home ... lts_4.html
only dead fish go with the flow
ade
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Re: Crankcase thread size/part no

Post by ade »

Cheers Colin very helpful ta. I wish I could find a AJS exploded diagram of the engine with part numbers which it is possible to zoom into your gain the numbers. But all the ones on the net lose quality when you zoom in and are unable to be read.
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clanger9
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Re: Crankcase thread size/part no

Post by clanger9 »

1989 Moto Morini Dart 350
1993 Ducati 750SS
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Stuoyb
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Re: Crankcase thread size/part no

Post by Stuoyb »

ade
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Re: Crankcase thread size/part no

Post by ade »

Briliant, been looking for one that quality for ages thanks. Sorry to new a pain but have you any idea what to torque these bolts up to? and is it good practise to use liquid thread lock?
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clanger9
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Re: Crankcase thread size/part no

Post by clanger9 »

"Tight so it doesn't come loose"

Yep, I'd use blue non-permanent threadlock on them.
1989 Moto Morini Dart 350
1993 Ducati 750SS
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