JT steel rear sprocket JTR1839.56, 56 teeth, 428 pitch

JT steel rear sprocket JTR1839.56, 56 teeth, 428 pitch

JT rear sprocket. The vehicle compatibility list below has been taken from the official JT Sprockets Application Guide 2024.

Technical data

• JT part number / fitment: JTR1839
• Installation position: Rear
• Chain pitch: 428
• Teeth selectable in shop: 56

Compatible with – official JT vehicle application

Important regarding tooth selection: The JT fitment number describes the compatible mounting. The application guide also specifies the number of teeth with which each vehicle is listed. A different number of teeth offered for the same fitment family alters the gear ratio and may differ from the stock gearing.

55 teeth according to JT Application Guide

• Yamaha SR500 (500 cc) – Year 91-00 – Chain 428, 130 links

56 teeth according to JT Application Guide

• Yamaha SR400 E,EC,F,FC,G,GC,H,HC 2RD (400 cc) – Year 14-17 – Chain 428, 130 links
• Yamaha SR400 Japan (400 cc) – Year 88-13 – Chain 428, 130 links

Installation and gearing note

• Before ordering, check the model, year of manufacture, chain pitch, and desired number of teeth.
• A different number of teeth changes the gear ratio and may require a different chain length or an adjustment of the chain tension.
• Perform installation and tightening torques according to the vehicle manufacturer's specifications.