All about Sunbeams S7 and S8 .
  • SUNBEAM MOTORCYCLES. HEADER PAGE.
  • Sunbeam News
  • About the bike.
  • Distributor Internals
  • Redundant spark ignition.
  • Coil Information.
  • Beam-Spark Ignition Unit
  • FOR SALE
  • Smiths Chronometric Speedometer
  • Calibrating Smiths Chronometric Speedometer.
  • Speedometer Drives.
  • Companies and Products.
  • My other bikes.
  • The Horn. and Rear Brake Spring.
  • HOW TO PAGE
  • Modifications Page One
  • Modifications Page Two
  • Modifications Page Three
  • Dipsticks,sumps and oil weirs.
  • The Electrics
  • Sunbeam Dynamo in depth.
  • Repairs and Maintenance.
  • Carburettors
  • S8 Front forks.
  • Full width front brake on the S8.
  • Top dead centre.
  • Your Sunbeam.
  • All things wheels.
  • Data Sheets.
  • Engine breathing and oil leaks.
  • Putting the engine together.
  • Stainless Steel Exhaust
  • Tools
  • All things final drive
  • I80 Degree Crankshaft
  • Completed engine speed ignition sytem.

All things final drive.



The gearbox cush drive.

The first picture shows a doughnut rubber breaking up. The wire mesh can be seen at the centre boss. If this fails the bike becomes almost immoveable. Picture 2 shows a worn cushdrive doughnut. The centre bosses are starting to break away.
Picture 2 shows cushdrive components and picture 3 shows part assembly. Picture 4 shows completed and painted ready to reinstall.
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