1983 BMW R80ST Remove Flywheel

As I plan to replace the rear main seal, that is the rear oil seal on the crankshaft, inspect the oil pump and replace the oil pump cover O-ring, I need to remove the flywheel. On 1981 model year (the 1981 model year started in September 1980) and later models, the flywheel is also called the “Clutch Housing”, (part# 21 21 1 338 722).

I previously removed the airbox, transmission and the clutch so I can access the flywheel. You can see how I do that work here.

The flywheel on the 1981 and later models (the 1981 model year started in September 1980) is different from the earlier models. It is lighter, for one thing and is mounted differently on the rear nose of the crankshaft. The procedure for removing the earlier flywheels (before September 1980) is different as shown in these documents.

The flywheel on the 1983 R80ST is the same as the one on the 1983 R100RS. I show how I removed the R100RS flywheel here. I’ll link to sections of this document as appropriate.

Here is a link to a document showing how I do this work and a video summary.

VIDEO: 1983 BMW R80ST Remove Flywheel

Air Impact Wrench With 19 mm Socket

Air Impact Wrench With 19 mm Socket

Flywheel Bolts Cover Plater

Flywheel Bolts Cover Plater

Flywheel Removed With Guide Ring Still On The Rear Nose Of The Crankshaft

Flywheel Removed With Guide Ring Still On The Rear Nose Of The Crankshaft

Nipple On Front Of Guide Ring And Groove Worn By Rear Main Seal

Nipple On Front Of Guide Ring And Groove Worn By Rear Main Seal

 

2 thoughts on “1983 BMW R80ST Remove Flywheel

  1. Thanks Brook for all the details that go into your videos and write-ups. It’s like having school on how to rebuild Airheads!

Leave a Reply to breams Cancel reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.