In preparation for removing the engine from the frame, I remove the top end (valve covers, heads, cylinders, wrist pin, cylinders) to reduce the weight. Although not part of the engine top end, I also removed and inspected the cam followers as it is convenient to do that now.
Ready To Remove Top End
This is not the first time I’ve done this. The 1983 R100RS motor is built the same as the 1983 R80ST motor, so the procedure I documented for the 1983 R100RS applies here as well. Rather than duplicate that procedure, here is the link to the documentation on the 1983 R100RS which contains all the details you need to complete this work.
This document will provide a brief summary of the procedure with pictures of what I found as I did this work on the R80ST engine along with a summary video of this work for the R80ST.
VIDEO: 1983 R80ST Remove Engine Top End and Cam Followers
And here is the longer video I made for the 1983 R100RS which contains additional information you may find helpful. However, I didn’t show removing the cam followers in this one.
VIDEO: 1983 R100RS Remove Engine Top End
Here is what the bike looks like now.
Engine Top End Removed
Engine Top End Removed
Engine Top End Removed
Thanks Brook! Aways enjoy your videos! Such a great project for a great cause!
Thank you for your kind words Mike.
Best.
Brook.
hi brook. your vids have been such an inspiration to me and I’m in the process of rebuilding my motor on a Bmw r100s from 1978.i need help pls. i need to purchase a camshaft with the rods to replace mine but I’m not sure how to find one that will replace the original. I saw on at eBay and its from a Bmw r75/7,r80/7,r100. are these just standard fit? what do I look for in buying these parts to suit my engine? your help is greatly appreciated . hope to hear from you soon.kind regards, don.
Hi Don,
The year/model uses part# 11 31 1 263 001. It is used on the R75/6, R75/7, R80, R90S, R90/6, R100S, R100/7, RS & RT up to 1984.
There should be not chips, rust or signs of abuse.
I hope this helps.
Best.
Brook.