This part is a new reproduction of the original. The originals have deteriorated with time, as they are very old. The original gear was nylon, this metal gear replacement, will last much longer, then the nylon. A common problem for the nylon gear, was they would develop cracks overtime. The part number is used for reference purposes only, and no source of manufacture or supply is implied. 
 
Part # = 214-16340-00-00
Part Description = PUSH LEVER ASSEMBLY
Fits the following models:
Model Count = 21
DT1 1968 250 DT1 Dual Purpose 
DT1B 1969 250 DT1 Dual Purpose 
DT1C 1970 250 DT1 Dual Purpose 
DT1C-MX 1970 250 DT1MX Dual Purpose 
DT1E 1971 250 DT1 Dual Purpose 
DT1MX 1971 250 DT1MX Dual Purpose 
DT1S 1969 250 DT1S Dual Purpose 
DT2 1973 250 DT2 Dual Purpose 
DT2MX 1972 250 DT2MX Dual Purpose 
DT3 1973 250 DT3 Dual Purpose 
RT1 1970 360 RT1 Off-Road 
RT1B 1971 360 RT1 Off-Road 
RT1M 1970 360 RT1M Off-Road 
RT1MX 1971 360 RT1MX Off-Road 
RT2 1973 360 RT2 Off-Road 
RT2MX 1972 360 RT2MX Off-Road 
RT3 1973 360 RT3 Off-Road 
YZ250A 1974 250 YZ250 Competition Motocross 
YZ250B 1975 250 YZ250 Competition Motocross 
YZ360A 1974 360 YZ360 Competition Motocross 
YZ360B 1975 360 YZ360 Competition Motocross