Heavy Duty Gold Drive Chain: Aprilia RS50 RS 50 (2004) Yamaha AT1 5 ohms as per the

5 ohms as per the originals

Also if you're just looking for a better spark

They have been manufactured to replace the original set of head stock bearings on a Yamaha RS100 for the years and models shown above

KTM Adventure 990 (2006-2009)

EBC: FA723

Heavy Duty Gold Drive Chain: Aprilia RS50 RS 50 (2004) Yamaha AT1 5 ohms as per theBrand new heavy duty gold drive chain to fit: Aprilia RS 50 Tuono (2004). This heavy duty gold chain has been manufactured to replace the original chain on a Aprilia RS50 for the years and models shown above. Pitch Width Links 420 124 Colour Gold Seal Type No Seal Master Link Type Clip Please check size, colour and seal type prior to purchasing. If you require a different size, you can find our full list of sizes by clicking HERE