DID is the OEM 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 to meet the needs of the SX and MX racing sport. DID recommends an application up to a cubic capacity of 150 ccm. In addition, rivets produced by a special process (SDH), which have a high surface hardness, speak for the 420NZ3.