JT Sprockets

Online Catalogue

Honda NSR250 R5K,K2,R6K,K2 (MC18) — Japan

Front Sprocket

Steel Front Sprocket

Part Number: JTF283

Teeth: 15

Available Sizes: 14, 15

Rear Sprocket

Steel Rear Sprocket

Part Number: JTR1209

Teeth: 42

Available Sizes: 41, 42

Drive Chain

Pitch: 520

Length: 108

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

TeethFront Sprocket
1415
Rear Sprocket412.93
+4.6%
2.73
-2.4%
423.00
+7.1%
2.80
standard

Lower gear ratios allow for higher top speeds.

Higher gear ratios increase torque for better acceleration.

Full Gear Ratio Chart (pdf)