500cc Top engine stay

Information relating to the Matchless G80 or AJS Model 18 500cc Heavyweight.
Shelby-Right
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500cc Top engine stay

Post by Shelby-Right »

Can anyone supply any pictures and a couple of measurements of the top stay , mine is missing , so I will have to make one , any help greatly appreciated, Bike is 1949 Matchless 500 g80 rigid Cheers.
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Rob Harknett
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Re: 500cc Top engine stay

Post by Rob Harknett »

http://archives.jampot.dk/book/Spares_l ... 0_G80C.pdf
See page 8 in your bikes parts list. Both parts, stay & C clip are available from club spares.
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Rob Harknett
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Re: 500cc Top engine stay

Post by Rob Harknett »

http://archives.jampot.dk/book/Spares_l ... 0_G80C.pdf
See page 8 in your bikes parts list. Both parts, stay & C clip are available from club spares.
Get hole fixing centres via the stud centres it goes on. You can work out the bottom width. It will be the O/A distance of the two fixing studs + about 1/4" each end. From the stud centre point measure up to the frame tube, deduct about 1/4" for stay metal thickness & tube clearance. If the rear end of the top of the stay fouls the tube, just Shaffer the rear of the top rad. to clear.
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clive
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Re: 500cc Top engine stay

Post by clive »

Rob Harknett wrote: Wed Aug 25, 2021 9:48 am http://archives.jampot.dk/book/Spares_l ... 0_G80C.pdf
See page 8 in your bikes parts list. Both parts, stay & C clip are available from club spares.
Vaughn would need to join the club to benefit from purchasing from the spares scheme.
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if it ain't broke don't fix
SPRIDDLER
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Re: 500cc Top engine stay

Post by SPRIDDLER »

Rob Harknett wrote: Wed Aug 25, 2021 9:48 am http://archives.jampot.dk/book/Spares_l ... 0_G80C.pdf
See page 8 in your bikes parts list. Both parts, stay & C clip are available from club spares.
From Vaughn's Profile making one would be a doddle with his skills. Besides, I'd think the postage to NZ would cost more than the bracket. (Pt. no. 014373 @ £10.28).
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spookefoote1956
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Re: 500cc Top engine stay

Post by spookefoote1956 »

Mount the engine then make a card template and cut one out of 3mm steel plate. You'll need to rig up a mounting ring to go round the top tube.
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Shelby-Right
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Re: 500cc Top engine stay

Post by Shelby-Right »

Easy to make , but would just like to make it look like an original , but I have only ever seen one end in an old book as drawn picture form .I have just made, nearly finished a S/S side stand as the Indian one i bought, fitted once it was tapped to 7/16 26 tpi, but the angle when folded was under the middle of the frame Cheers for your help .
Shelby-Right
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Re: 500cc Top engine stay

Post by Shelby-Right »

Ok , I found a photo on the forum of a top stay and as explained it was looking like a 3mm plate bent and bolted to the head etc , I just found the only photo that I had previously seen in , " The new book of the Matchless " on page 105 showing a top engine stay which is quite different , does anyone know which design the 49, 500 might have . Cheers.
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clive
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Re: 500cc Top engine stay

Post by clive »

49 G80 the standard triangular stay with section bent at 90 degrees to fit over the extended bolts.
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Shelby-Right
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Re: 500cc Top engine stay

Post by Shelby-Right »

Thanks Clive .
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