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15 Tooth Front Drive Sprocket for Yamaha DT400

This 15 tooth front drive sprocket for Yamaha DT400 motorcycles transfers engine power to the drive chain, serving as a direct-fit replacement for the countershaft sprocket on 1977-1978 DT 400 models.

Overview

This front drive sprocket for Yamaha DT400 is a 15 tooth countershaft sprocket that engages the drive chain to put engine power to the rear wheel. It is built for 1977-1978 Yamaha DT 400 models and works as a stock replacement when the original sprocket is worn. A practical choice for riders rebuilding the drivetrain on a vintage DT 400.

Built For Performance

• 15 tooth count matches the stock size
• Machined tooth profile for smooth chain engagement
• Hardened steel construction resists wear
• Center bore and mounting pattern match the countershaft
• Sold individually for direct replacement

Fits These Machines

• for Yamaha DT400, 1977
• for Yamaha DT400, 1978

On-The-Job Use

• Replacing a worn or hooked front sprocket
• Drivetrain rebuilds on vintage enduro bikes
• Restoring stock gearing on a DT 400
• Routine chain and sprocket service

Specs At A Glance

Good To Know

Q: Should I replace the chain and rear sprocket at the same time? A: It is recommended to replace the front sprocket, rear sprocket, and chain as a set to prevent uneven wear. A worn chain will quickly damage a new sprocket.

Q: Does this sprocket change my gearing? A: This is a 15 tooth sprocket, so it maintains stock gearing when used with the original rear sprocket and chain. Changing tooth count would alter your final drive ratio.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.