JT Sprockets

Online Catalogue

Honda TRX250 R

1988 to 1989

Front Sprocket

Steel Front Sprocket

Part Number: JTF337

Teeth: 13

Available Sizes: 12, 13, 14, 15

Rear Sprocket

Steel Rear Sprocket

Part Number: JTR1350

Teeth: 38

Available Sizes: 36, 37, 38, 39, 40

Racelite Aluminium Rear Race Sprocket

Part Number: JTA1350BLK

Teeth: 38

Available Sizes: 38, 39

Drive Chain

Pitch: 520

Length: 92

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
12131415
Rear Sprocket363.00
+2.6%
2.77
-5.3%
2.57
-12.0%
2.40
-17.9%
373.08
+5.5%
2.85
-2.6%
2.64
-9.6%
2.47
-15.6%
383.17
+8.3%
2.92
standard
2.71
-7.1%
2.53
-13.3%
393.25
+11.2%
3.00
+2.6%
2.79
-4.7%
2.60
-11.1%
403.33
+14.0%
3.08
+5.3%
2.86
-2.3%
2.67
-8.8%

Lower gear ratios allow for higher top speeds.

Higher gear ratios increase torque for better acceleration.

Full Gear Ratio Chart (pdf)