International buyers: Message me on the homepage, with your shipping address, and what you wish to buy, and I will get back to you with the price.
 
Fits the following models:
1968 Yamaha DT1
1969 Yamaha DT1S
1969 Yamaha DT1B
1970 Yamaha DT1C
1970 Yamaha DT1M
1970 Yamaha RT1
1970 Yamaha RT1M
1971 Yamaha DT1E
1971 Yamaha DT1MX
1971 Yamaha RT1B
1971 Yamaha RT1MX
1972 Yamaha DT2
1972 Yamaha RT2
1973 Yamaha DT3
1973 Yamaha RT3
1974 Yamaha DT250A
1974 Yamaha DT360A
1975 Yamaha DT250B
1975 Yamaha DT400B
1976 Yamaha DT250C
1976 Yamaha DT400C
 
This part is no longer available from Yamaha. It has been discontinued. This part is a new reproduction of the original. The originals have been worn down, from being ridden. The part numbers are used for reference purposes only and no source of manufacture or supply is implied. These are a great replacement at a fair price. The part is comparable to the original. It is concourse correct for the 1968 Yamaha DT1 & a close replica for the other years/models. This sprocket has 44th teeth, which is what was standard on the 1968 Yamaha DT1. 44 tooth was not the standard for all models that this sprocket will fit. The front sprocket can be changed out, to achieve the desired gear ratio, while maintaining the original look.
 
Made from 40Cr steel. It also has been heat treated and zinc plated.  The heat treatment was done to improve durability, by significantly increasing its hardness and wear resistance. This steel sprocket will last much longer then any of the aluminum sprockets being made.
 
After heat treatment, the steel has reached HRC 48-50. This means the steel has a hardness rating of between 48 and 50 on the Rockwell C scale. The weight of this sprocket is approximately 958 Grams +/- a few grams.
 
It is highly recommended to replace the chain and sprocket at the same time, as a set. Using a worn chain, with this new sprocket, will wear the sprocket out quicker. This sprocket should be used with a 520 chain.
 
The price includes sales tax. If you want additional insurance coverage, contact me before ordering. If you do not purchase insurance, I am not responsible for mis-delivered packages, lost packages, or shipping damage.