Online Catalogue
Gas Gas 250 EC 4T
2011 to 2012
Front Sprocket
Lightweight Self-Cleaning Front Sprocket
Part Number: JTF1590SC
Teeth: 13
Available Sizes: 13, 14
Steel Front Sprocket
Part Number: JTF1590
Teeth: 13
Available Sizes: 12, 13, 14
OE Type Rubber Cushioned Front Sprocket
Part Number: JTF1590RB
Teeth: 13
Available Sizes: 13
Rear Sprocket
Steel Rear Sprocket
Part Number: JTR822
Teeth: 48
Available Sizes: 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53
Racelite Aluminium Rear Race Sprocket
Part Number: JTA822BLK
Teeth: 48
Available Sizes: 44, 45, 48, 49, 50, 51, 52, 53
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 |
12 | 13 | 14 |
Rear Sprocket | 48 | 4.00 +8.3% | 3.69 standard | 3.43 -7.1% |
Lower gear ratios allow for higher top speeds.
Higher gear ratios increase torque for better acceleration.
Full Gear Ratio Chart (pdf)
JTF1590SC is a Lightweight Self-Cleaning sprocket