Originally Posted by rj987652003
what do you guys ude to clean your drive train? WD-40?
Also when do you know your chain has to be replaced?
For cleaning, go to the autoparts store and buy a can of Brake Cleaner. Its about $2 in a big aerosol can, and is the same exact thing as the $10 half sized can of Clean Streak you will find at most bike shops.
Simplegreen or Purple Power also work well and are more bio-friendly, but require more soaking and rinsing.
For the chain, Park makes a chain gauge tool that snaps in between the links and gauges the wear. It does a fair job and is easy to use. If your chain is toast you should replace the cassette at the same time since they wear together.