Modern motorcycles invariably use
O-ring chains. This contrasts to the
traditional roller chain. Using o-rings to seal the inner
bearing
surfaces keeps out
foreign matter (dirt and water) and can translate
to a
useful life of 10-15000 miles.
Older bikes may not be able to fit the wider o-ring chain. Roller chain
needs far more frequent lubrication and cleaning. Even with careful
attention they will last less than 3-5000 miles before the wear of the
chain will accelerate the wear of the sprockets.