YBR125 motorcycle time gauge chain layering set, size, radian and 06 YBR125 time gauge chain completely match, directly replace the original layering without adjusting the installation position; The main body adopts engineering plastic + wear-resistant lining layer, which not only guarantees the structural strength, but also reduces the friction loss with the chain; The package includes guide layering (to regularize the chain track) and tension layering (to maintain the chain tension) to ensure the stability of timing transmission; The fit design reduces the chain jitter and effectively reduces the transmission noise of the air distribution system.