Online Catalogue

Yamaha YFZ450 R-Y,Z,A,B,D,E,F,G,H,J,K

2009 to 2019

Front Sprocket

OE Type Rubber Cushioned Front Sprocket

Part Number: JTF1592RB

Teeth: 14

Available Sizes: 14

Steel Front Sprocket

Part Number: JTF1592

Teeth: 14

Available Sizes: 13, 14, 15, 16

Rear Sprocket

Steel Rear Sprocket

Part Number: JTR1857

Teeth: 38

Available Sizes: 36, 37, 38, 39, 40, 42, 45, 47

Racelite Aluminium Rear Race Sprocket

Part Number: JTA1857BLK

Teeth: 38

Available Sizes: 36, 37, 38

Drive Chain

Pitch: 520

Length: 98

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
Teeth		13	14	15	16
Rear Sprocket	38	2.92 +7.7%	2.71 standard	2.53 -6.7%	2.38 -12.5%

Lower gear ratios allow for higher top speeds.

Higher gear ratios increase torque for better acceleration.

Full Gear Ratio Chart (pdf)