M MATI Start/Stop Switch Kit for Yamaha ATVs — Left Handlebar Switch, Starter Solenoid Relay & Plug

Complete left-handlebar start/stop switch kit with starter solenoid relay, plug harness and spark component designed to replace OEM Yamaha parts for multiple ATV models.

This M MATI kit supplies the left handlebar start/stop switch assembly plus a high-quality starter solenoid relay, plug harness and spark component to restore reliable starting and switch control on compatible Yamaha ATVs. The set matches the indicated manufacturer and replacement part numbers and is built from durable materials for corrosion resistance and straightforward installation. It’s packaged to include everything needed for a direct replacement without hunting down separate parts.

Which Yamaha ATVs will this kit fit?

This kit is made to fit a wide range of Yamaha utility and sport ATVs from the early 2000s through the 2010 model years. Confirm fitment with your VIN or by checking the listed model years and model names before ordering.

• Big Bear 250 (YFM250) 2007–2009 and Big Bear 400 (YFM400) 2002–2006
• Bruin 250/350 (YFM250/350) 2004–2006 model years
• Grizzly 350/400/660 and Kodiak 400/450 models across 2001–2014 ranges as specified
• Raptor 350/660 and Wolverine 350/450 family models within listed years

How does the starter solenoid relay improve starting reliability?

The included starter solenoid relay completes the heavy-current path between the battery and starter motor while protecting control circuits from high current. Made with copper contacts and a PVC housing, the relay is designed to resist oxidation and rust for longer service life under outdoor conditions.

• Copper contact points for consistent current transfer
• PVC outer housing resists moisture and corrosion
• Direct-replacement part numbers matched to OEM specs for compatibility

Is the left handlebar switch assembly easy to install?

The left handlebar switch in this kit is supplied as a plug-and-play assembly that uses the same connector layout as the original equipment. Basic hand tools and a short amount of time are typically all that’s required for swap-in replacement, and the harness routing replicates the factory path.

• Pre-wired assembly with OEM-style connector for quick fitment
• Mounting points match factory switch housing dimensions
• Includes plug harness to avoid splicing and preserve factory wiring

What exactly comes in the package and what part numbers does it replace?

The package contains the left handlebar switch assembly, a starter solenoid relay, a plug harness and a spark component—packaged together for a complete electrical replacement. The kit corresponds to multiple manufacturer and replacement part numbers for easy cross-referencing with Yamaha service parts lists.

• Contents: Left Handlebar Switch Assy x1, Starter Solenoid Relay x1, Plug Harness x1, Spark x1
• Manufacturer Part Numbers: 5LP-83973-01-00, 5LP-83973-00-00, 4SV-81940-12-00
• Replacement Part Numbers: 4XE-81940-12-00, 1D0-81940-02-00

Who is this for? Riders, repair shops and DIY mechanics who own compatible Yamaha ATVs and need a dependable, OEM-style replacement set for the left handlebar start/stop switch and starter relay will find this M MATI kit useful. It’s aimed at anyone restoring starting function or replacing weathered electrical components without sourcing separate parts, and for those who want corrosion-resistant materials and an easy install that mirrors factory connections.