DID is original equipment manufacturer of many Japanese and European brands. Leading racing teams in the Road and off road sports rely on the technology of DID. DID 420NZ3: The 420NZ3 has been designed with the needs of the SX and MX racing in mind. DID recommends an application up to a cubic capacity of 150 ccm. In addition, the 420NZ3 uses rivets produced by a special process (SDH), which have a high surface hardness. Gold-colored outer straps, black inner straps (G & B Gold and Black).