RK Natural 428 RKM Standard Drive Chain - M428-110
RK Standard series (M) 420 drive chain
RK Takasago U-Ring Chain MXU 520, one of the lightest MX sealed chain on the market. 120 links, available in gold or natural steel.
RK Takasago heavy duty chain MXZ/MXZ4 for motocross, non seal, 120 links