JT Sprockets

Online Catalogue

Honda XL250 SZ,SA,SB

1978 to 1981

Front Sprocket

Steel Front Sprocket

Part Number: JTF1265

Teeth: 14

Available Sizes: 12, 13, 14, 15, 16

Rear Sprocket

Steel Rear Sprocket

Part Number: JTR245/2

Teeth: 53

Available Sizes: 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53

Drive Chain

Pitch: 520

Length: 102

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
1213141516
Rear Sprocket383.17
-16.4%
2.92
-22.8%
2.71
-28.3%
2.53
-33.1%
2.38
-37.3%
393.25
-14.2%
3.00
-20.8%
2.79
-26.4%
2.60
-31.3%
2.44
-35.6%
403.33
-11.9%
3.08
-18.7%
2.86
-24.5%
2.67
-29.6%
2.50
-34.0%
413.42
-9.7%
3.15
-16.7%
2.93
-22.6%
2.73
-27.8%
2.56
-32.3%
423.50
-7.5%
3.23
-14.7%
3.00
-20.8%
2.80
-26.0%
2.62
-30.7%
433.58
-5.3%
3.31
-12.6%
3.07
-18.9%
2.87
-24.3%
2.69
-29.0%
443.67
-3.1%
3.38
-10.6%
3.14
-17.0%
2.93
-22.5%
2.75
-27.4%
453.75
-0.9%
3.46
-8.6%
3.21
-15.1%
3.00
-20.8%
2.81
-25.7%
463.83
+1.3%
3.54
-6.5%
3.29
-13.2%
3.07
-19.0%
2.88
-24.1%
473.92
+3.5%
3.62
-4.5%
3.36
-11.3%
3.13
-17.2%
2.94
-22.4%
484.00
+5.7%
3.69
-2.5%
3.43
-9.4%
3.20
-15.5%
3.00
-20.8%
494.08
+7.9%
3.77
-0.4%
3.50
-7.5%
3.27
-13.7%
3.06
-19.1%
504.17
+10.1%
3.85
+1.6%
3.57
-5.7%
3.33
-11.9%
3.12
-17.5%
514.25
+12.3%
3.92
+3.6%
3.64
-3.8%
3.40
-10.2%
3.19
-15.8%
524.33
+14.5%
4.00
+5.7%
3.71
-1.9%
3.47
-8.4%
3.25
-14.2%
534.42
+16.7%
4.08
+7.7%
3.79
standard
3.53
-6.7%
3.31
-12.5%

Lower gear ratios allow for higher top speeds.

Higher gear ratios increase torque for better acceleration.

Full Gear Ratio Chart (pdf)