M MATI Yamaha ATV Start/Stop Switch & Starter Solenoid Kit — Big Bear, Grizzly, Kodiak Fit, Plug‑in Harness

The M MATI kit bundles a left handlebar start/stop switch, starter solenoid relay, plug harness and spark plug—direct-fit replacements for many Yamaha ATV models.

If your Yamaha ATV is showing intermittent starting, a stuck starter circuit, or a damaged left handlebar switch, this all-in-one replacement kit simplifies repairs with parts engineered to match OEM connectors and fitments. The set includes the left handlebar switch assembly, a high-quality starter solenoid relay built from copper and durable PVC, a plug harness for easy wiring, and a spark plug—packaged together to restore starting reliability without hunting for individual components.

Which Yamaha ATVs are compatible with this M MATI kit?

This kit covers a broad range of Yamaha models across model years listed by fitment. It was designed to suit many Big Bear, Bruin, Grizzly, Kodiak, Raptor and Wolverine variants—check the specific model and year list before ordering.

• Big Bear 250 (YFM250) 2007–2009 and Big Bear 400 (YFM400) 2002–2006
• Bruin 250/350, Grizzly 350/400/660, Kodiak 400/450, Raptor 350/660 and Wolverine 350/450 years noted in fitment
• Replacement/Manufacturer part numbers included for cross-reference: 5LP-83973-01-00, 5LP-83973-00-00, 4SV-81940-12-00, 4XE-81940-12-00, 1D0-81940-02-00

How easy is it to install the starter solenoid and handlebar switch?

Installation is intended to be straightforward for anyone comfortable with basic ATV maintenance. The harness uses OEM-style connectors for a plug-and-play fit, minimizing cutting or splicing. Professional installation is recommended if you lack wiring or mechanical experience.

• OEM-compatible connectors for direct fit
• Starter solenoid mounts to original bracket and wiring
• Left handlebar switch replaces existing assembly with standard controls
• Includes plug harness to reduce wiring complexity

What materials and durability features does the kit offer?

The starter solenoid relay is constructed from copper contacts and a PVC housing to resist oxidation and corrosion, helping the part endure wet or dirty riding conditions. The handlebar switch assembly is built to match factory fit and function for durable everyday use.

• Copper contact points for reliable conductivity
• PVC housing provides anti-rust and anti-oxidation protection
• Switch assembly matches OEM ergonomics and connectors
• Packaged together to prevent lost pieces during installation

What comes in the box and how is service handled?

The package contains a left handlebar switch assembly, one starter solenoid relay, a plug harness, and a spark plug—all shipped in a protective box ready for installation. M MATI provides customer support for product issues so buyers can get help if a part arrives defective or does not match fitment.

• Left handlebar switch assy x 1
• Starter solenoid relay x 1
• Plug harness x 1
• Spark plug x 1

Who is this for: This kit is intended for ATV owners and DIY mechanics who need a reliable replacement for worn or faulty starting components on compatible Yamaha models. It’s a practical solution for riders restoring older machines, fleet managers keeping work ATVs operational, or anyone who prefers a complete, OEM-style replacement bundle rather than sourcing parts piece by piece.