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Speedo Drive 1972 500 K1

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Charliecharlcomb:
As I've got my wheels apart for restoration I have a chance to refurbish my speedo drive. It looks OK tbh and I'm inclined to leave it alone. I guess the alternative is to thoroughly degrease and flush it and then repack with grease.

I've ordered a new speedo drive oil seal as recommended by Ken elsewhere (it doesn't appear in the parts list.)

https://www.ebay.co.uk/itm/224125083081

I guess my question is:

1) Should I leave it alone or clean it up?

2) What grease should I use to repack it? The current grease is very black

Any suggestions are welcomed.

Trigger:
Easy to take apart and refurbish. As in the bottom of this page >> http://www.sohc.co.uk/index.php/topic,20419.30.html

Charliecharlcomb:

--- Quote from: Trigger on November 16, 2022, 12:51:27 PM ---Easy to take apart and refurbish. As in the bottom of this page >> http://www.sohc.co.uk/index.php/topic,20419.30.html

--- End quote ---

Think that's a good plan, thanks

Toko_Jo:
Has anyone been able to identify the differences between the CB750K0/sandcast spedo drive and the later ones? And do the later ones work on a K0/sandcast. OK I know the hubs are different widths and the drive-plates are different but I don't see any significant differences in the speedo drives themselves.

Oddjob:
If I was giving one piece of advise on doing this Charlie it would be to make sure the screwdriver you are using to remove the grub screw fits perfectly. It's made of brass ( I think) and it's very soft and it's very easy to round it off with an ill fitting screwdriver. A little heat when removing it can't hurt as well. The bung in the end is a press fit, it's knurled so don't try to spin it out, the only way I found to get it out is to use the drive gear to push it out, that can be a little daunting as the small tang for the cable is all you have to press against, it's possible though. So remove the large seal first, remove the circlip holding the drive bevel in place and the shim and the drive bevel, then remove the grub screw, press out the drive gear and you can finally remove the seal on the drive gear then.

Got 2 of mine part right now, not decided on a grease yet but leaning towards using MolyD due to it's high loading properties but feel free to use what you think is best for you.

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