Online Catalogue
Yamaha MX100 A,B,C,D,E — USA
1974 to 1978
Front Sprocket
Rear Sprocket
Steel Rear Sprocket
Part Number: JTR838
Teeth: 52 Check Availability
Available Sizes: 31, 35, 36, 37, 38, 39, 42, 43, 45, 49, 54
![](fileadmin/product_images/diagrams/small/JTR838.png)
![](fileadmin/product_images/photos/small/JTR838-45 Steel Sprocket 2018_11_09.jpg)
Please note that the chain shown in this listing is for size reference only. For the correct chain type and grade, please refer to the vehicle's manufacturer manual.
Gear Ratio Chart
Teeth | Front Sprocket | |
14 | ||
Rear Sprocket | 52 | 3.71 standard |
Lower gear ratios allow for higher top speeds.
Higher gear ratios increase torque for better acceleration.
11 and 12 tooth versions do not feature bolt holes