CDI Box Unit ECU for Yamaha YFM 350 Wolverine Sport Grizzly 5UH-855400000 US

CDI Box Unit ECU for Yamaha

This CDI box unit ECU for Yamaha regulates the ignition timing and spark energy for optimal engine combustion, cross-referencing with part number 5UH-85540-00-00.

Overview

This CDI box unit ECU for Yamaha manages the ignition advance curve to maximize the performance of the all-terrain vehicle. Acting as the electronic brain of the ignition system, this CDI box unit ECU delivers a strong, stable spark across all engine RPMs. Designed for riders seeking to restore dependable starting and clean combustion to recreational or utility machines.

Built For Performance

• Features advanced microchip circuitry for precise ignition timing.
• Housed in a heat-resistant casing to protect internal electronics.
• Pre-configured plug connections allow direct installation into original wiring harnesses.
• Optimized spark energy output improves cold-start reliability.

Fits These Machines

• for Yamaha YFM 350 Wolverine
• for Yamaha YFM 350 Wolverine Sport
• for Yamaha YFM 350 Grizzly

On-The-Job Use

• Replacing faulty factory ignition controllers causing no-spark issues.
• Restoring consistent engine performance on rugged off-road trails.
• Maintaining utility ATVs used for daily agricultural tasks.

Specs At A Glance

Good To Know

Q: What are common symptoms of a bad CDI unit? A: Common symptoms include intermittent misfires, complete loss of spark, engine backfiring, or a sudden shutdown once the engine warms up.

Q: Does this unit require custom programming? A: No, this unit is pre-programmed to meet standard operating specifications and is ready for plug-and-play installation.

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