Tha Yam ones are indeed Acerbis and as such you can buy them from any dealer or online for about half the price Yamaha charge!

Word of warning though - some of the aftermarket ones don't come with the fitting kit included. Some can charge up to �25 for the bolts and bar adaptors.

I have the Acerbis ones with the metal inside for protecting your levers and I've already benefitted from them in a 20mph spill down some Northants lanes. I went over the bars, the bike came to a sickening halt in a rut and the only damage was a bent handguard and bent front brake lever. They definately saved me from some broken levers 60 miles from home. Worth the expense if you ask me!