Dismantling B31 plunger rear suspension

Started by yellow B31, 21 Oct, 2024, 13:44

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yellow B31

I have the BSA book of service sheets and also a genuine instruction manual.
The service sheets show special BSA tools to dismantle and re assemble where as the instruction manual says it all can be done without service tools. Can it?
Is it a struggle and better done with some home made tools to aid assembly.
I know from experience that tools are required to do the same job on a Norton.

iansoady

I too have done it on a Norton and it was a pretty scary operation! But the only special "tool" was a long 1/4" threaded rod and a couple of penny washers. I would avise against trying without as those springs can pack a pretty punch.

This is my Norton tool.

Ian.
1964 Norton Electra
1969 BSA / Suzuki DZR400 / Steib S501
2016 Herald Classic 250

yellow B31

I guessed I would need that arrangement. Thanks. 

Dan_B33

When you look into YouTube you will find guy using some carpenter bench clamp.

For my plunger B33 I have used that method and had no problem . Worked fine.
Not an expert! But made it with help of this forum

V500

I did it on mine using nothing more than arm strength and my weight. On BSA's it's do-able, unlike Nortons which are apparently sods to do without tools.

yellow B31

Thanks for reply's. My next winter project.