CAM CHAIN SCA-0412A 104L DID 3114001, 30-412.DID

HONDA
XL250S 1978-1981,
XL250R 1982-1983,
XR250 1979-1980,
XR250R 1981-1982,

SC silent chains (SCA, SCR, SC) SC silent chains use specially-coated round pins and special plates to achieve an ideal engagement mechanism, and can keep a noise level remarkably lower than conventional roller chains.

SC type silent chains can be used for high speed and large tension transmission just like a toothed metallic belt since the plates directly engage with the sprockets for driving. SCR-04 silent chains are designed with inner engaging structure for further reduced noise level.

Part No. 30-410.104.DID (phoenixmotos.com)

Cross reference numbers ONLY.
3114001, 30-412.DID, K&L 12-0394, 82RH2015-104M, 14401-428-003,