German site looks interesting

[AshimotoK0]

http://www.fourever-classic-parts.de/

They do the replacement primary cush drive repairs etc.

http://www.fourever-classic-parts.de/index.php?option=com_content&view=article&id=26&Itemid=31

[Chris400F]

I see he does electronic ignition systems too - wonder if they are any good.
Unfortunately my German is non-existent so I can't easily read the page.
The translate feature of Google Chrome has a go but still comes up with some 'interesting' phrases!

[AshimotoK0]

That doesn't look like a 500 primary drive gear Ash (bottom pic), to me that looks like the clutch basket. The primary drive rubbers are still available and simple to change and a LOT cheaper than he's quoting, however if that's the damper in the back of the clutch basket (never had one go on a 500 but hey they do age like everything else) then it may be like the 400 clutch basket repairs that were on the site last year. Interesting if it is a clutch repair kit though.

Yes realised that on the 500 Ken after I posted it. Already bought those 8 rubbers and Hyvo chain from Yamiya (same part nos as 400/4) .I think the 750 primary rubbers were originally produced by a German forum site but only sold to their own members.