SPI Knock Sensor for Yamaha many 2004-2021 Snow Replaces OEM# 8FE-85780-00-00

SPI Knock Sensor for Yamaha

This knock sensor is designed to detect engine detonation in Yamaha snowmobiles, replacing OEM part number 8FE-85780-00-00.

Overview

The SPI knock sensor monitors combustion chamber vibrations to prevent engine damage in Yamaha snowmobiles from 2004 to 2021. It directly replaces OEM part 8FE-85780-00-00, ensuring accurate knock detection and proper ignition timing. Ideal for maintaining peak performance in two-stroke and four-stroke snowmobile engines.

Built For Performance

• Direct OEM replacement for part 8FE-85780-00-00
• High sensitivity piezoelectric element detects early detonation
• Rugged housing resists vibration, moisture, and temperature extremes
• Precision threaded mounting for secure installation
• Tested for reliable operation in cold start conditions

On-The-Job Use

• Installed on Yamaha snowmobiles from 2004 through 2021
• Used in both recreational and trail riding conditions
• Helps protect engines during aggressive throttle application
• Essential for tuned or high-compression motors

Specs At A Glance

Good To Know

Q: Will this knock sensor work on all Yamaha snowmobiles? A: It is designed for models from 2004 to 2021, but always verify compatibility with your specific serial number.

Q: How do I install the knock sensor? A: Installation typically involves threading the sensor into the engine block and connecting the wire harness; consult your service manual for torque specs.

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