Spacer rotor

Information relating to the Matchless G12 or AJS Model 31 650cc twin
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ajsph
Member
Posts: 326
Joined: Mon Jan 01, 1990 12:00 am
Location: DENMARK

Spacer rotor

Post by ajsph »

I want to know the correct dimension of the spacer between the engine sprocket and the rotor part no. 025034 (G12 1961), hope someone on the forum can help me.
Regards Poul (Denmark)
electrajohnt
Posts: 136
Joined: Wed May 08, 2019 7:41 pm
Location: UK

Re: Spacer rotor

Post by electrajohnt »

Hello ajsph

Below are dimensions taken using a digital vernier, I have written the dimension indicated, some rounding up or down may be possible.
The configuration of the spacer is a disc with hole in it with external chamfer ones side and internal chamfer opposite side. See the attached sectional view of the engine, magnify it and you will see what I mean.

Outside diameter. 37.97 mm
Inside diameter. 19.38 mm
Over all thickness. 6.33 mm
External chamfer diameter. 32.24 mm
External chamfer depth. 0.77 mm
Internal chamfer diameter. 27.83 mm.
Internal chamfer depth. 2.40 mm

Regards
JohnT
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JohnT
ajsph
Member
Posts: 326
Joined: Mon Jan 01, 1990 12:00 am
Location: DENMARK

Re: Spacer rotor

Post by ajsph »

Hi John
Thanks for the help
Best regards
Poul (Denmark)
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