The 6mm aluminum base will protect your engine cases should your chain ever break. On top of that is a 4mm thick custom carved plate to keep your pants and other things out of the chain as well. Works with both the 14 and 15 tooth sprockets. A great investment.
Replace your lower chain roller with this high quality roller with 2 sealed ball bearings. The stock roller has no bearings. It's just a plastic wheel riding on a bolt. Ball bearing chain rollers are smoother, quieter and last longer.