GregAus wrote:This shows the various ignition systems http://www.russianiron.com/eafranke_ural2/PartIV.pdf Yours is the ПМ302А (PM302A). It is this unit that is jokingly referred to as the "mixing bowl of doom". The advance unit pictured in the pdf is the type you want. The one-piece unit is known to fall apart.
As to slingers, the only way to check them is to remove the crankshaft. Not difficult but requires special tools which you may or not be able to borrow or hire from a BMW /2 specialist or make yourself to remove rear bearing and to re-install. Do a search for "clean BMW oil slingers" to help you make up your mind. Original guidelines were to check and clean the slingers between 30-50,000 km. You've got a bike that's 47 years old, no knowledge of the true mileage and no knowledge of prior maintenance. Were oil changes done regularly or was the oil just regularly topped-up????
Here is the story of a M-63 restoration http://www.russianiron.com/forums/index ... 15431&st=0 and a M-66 engine rebuild (same as M-63 except for oil filter) http://www.russianiron.com/forums/index ... 15676&st=0
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