Spacer rotor

Information relating to the Matchless G12 or AJS Model 31 650cc twin
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Location: DENMARK

Spacer rotor

Postby ajsph » Fri Nov 29, 2019 9:10 am

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)

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Location: UK

Re: Spacer rotor

Postby electrajohnt » Tue Dec 03, 2019 7:42 pm

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

Member
Posts: 216
Joined: Mon Jan 01, 1990 12:00 am
Location: DENMARK

Re: Spacer rotor

Postby ajsph » Tue Dec 03, 2019 8:11 pm

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

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