JT Sprockets

Online Catalogue

Honda CR85 RB-3,4 Expert >>> 428 Chain Conversion

2003 to 2004

Front Sprocket

Part Number: JTF1257

Teeth: 15

Available Sizes: 14, 15

Rear Sprocket

Part Number: JTR217

Teeth: 56

Available Sizes: 49, 50, 52, 55, 56

Aluminium Rear Sprocket

Part Number: JTA217

Teeth: 56

Available Sizes: 49, 50, 55, 56

Drive Chain

Pitch: 428

Length: 124

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

Full Gear Ratio Chart (pdf)

Teeth1415
493.503.27
503.573.33
523.713.47
553.933.67
564.003.73