JT rear steel sprocket JTR840.35, 35 teeth, 530 pitch

JT steel rear sprocket JTR840.35, 35 teeth, 530 pitch

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

Technical specifications

• JT part number / fitment: JTR840
• Installation position: Rear
• Chain pitch: 530
• Teeth selectable in shop: 35

Compatible with – official JT vehicle list

Important information on selecting the number of teeth: The JT fitment number describes the compatible mounting. The application guide also specifies the number of teeth originally used for each vehicle. Selecting a different number of teeth from the same fitment family will change the gear ratio and may differ from the stock gearing.

35 teeth according to JT Application Guide

• Yamaha XS400 J,K USA (400 cc) – Model year 82-83 – Chain 530, 100 links

38 teeth according to JT Application Guide

• Yamaha XS250 RK,SK Australia (250 cc) – Model year 82 – Chain 530, 100 links
• Yamaha XS400 DOHC (400 cc) – Model year 82 – Chain 530, 102 links
• Yamaha XS400 R J,K Maxim USA (400 cc) – Model year 82-83 – Chain 530, 102 links

Installation and gearing note

• Check model, model year, chain pitch, and desired number of teeth before ordering.
• 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 in accordance with the vehicle manufacturer's specifications.