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Other Bikes / Re: BMW R80
« Last post by Orcade-Ian on Today at 06:08:58 PM »Hi Dave,
I've had an R65 many years ago and an R100 RT Classic more recently. Engines are virtually bomb-proof - if servicing has not been skimped. Depending on the year, gearboxes can be troublesome. Not sure of change points but early bikes had a circlip holding a bearing in place. BM accountants decided it wasn't necessary as the bearing couldn't come off the shaft! True, BUT it could move and cause bearing failure. Saved them a few pence on each bike. Many replaced under warranty, so the circlip was refitted and the groove re-introduced. My 95 R100 had the groove - a friends 88 R80 didn't. I made a rig for the lathe to re-machine the groove in the hardened shaft with a thin grinding disc in the dremel. All gearboxes can suffer from gearchange spring failure which leaves you in whichever gear you were in when it failed. A few special tools needed to strip the box and the casing has to be heated to get everything out. I made the tools and gave them to the mate with the R80 but could beg them back if you needed them.
http://www.stallard-engineering.co.uk/stories/Bikes/European/BMW%20Gearbox%20Tool.htm
Ian
I've had an R65 many years ago and an R100 RT Classic more recently. Engines are virtually bomb-proof - if servicing has not been skimped. Depending on the year, gearboxes can be troublesome. Not sure of change points but early bikes had a circlip holding a bearing in place. BM accountants decided it wasn't necessary as the bearing couldn't come off the shaft! True, BUT it could move and cause bearing failure. Saved them a few pence on each bike. Many replaced under warranty, so the circlip was refitted and the groove re-introduced. My 95 R100 had the groove - a friends 88 R80 didn't. I made a rig for the lathe to re-machine the groove in the hardened shaft with a thin grinding disc in the dremel. All gearboxes can suffer from gearchange spring failure which leaves you in whichever gear you were in when it failed. A few special tools needed to strip the box and the casing has to be heated to get everything out. I made the tools and gave them to the mate with the R80 but could beg them back if you needed them.
http://www.stallard-engineering.co.uk/stories/Bikes/European/BMW%20Gearbox%20Tool.htm
Ian