OLIFANT Ignition CDI Box for Honda Fourtrax 300 TRX300/TRX300FW (1998–2000) - Direct-Fit 8-Pin Replacement

OLIFANT Ignition CDI Box is a direct-fit replacement module for Honda Fourtrax 300 (TRX300/TRX300FW) 1998–2000 models, restoring reliable spark control for both 2x4 and 4x4 variants.

If your Fourtrax 300 is showing intermittent firing, hard starts, stalling, or other ignition-related symptoms, a faulty CDI (capacitor discharge ignition) module is often the culprit. This OLIFANT unit is built to match factory fitment and electrical characteristics for TRX300 and TRX300FW models made between 1998 and 2000. It uses ST semiconductor chips and precision manufacturing to provide stable operation under varied riding conditions and has passed FCC compliance testing.

Will this CDI box fit my Honda Fourtrax 300 from 1998–2000?

Yes — the OLIFANT CDI is designed as a direct replacement for the specified TRX300 years and supports both 2x4 and 4x4 versions. It matches the original mounting and connector layout and uses the same pin count for straightforward swapping.

• Models covered: TRX300 and TRX300FW (1998–2000)
• Reference numbers: 30410-HM5-A11, 30410-HM5-A10, 30400-HM5-506, 30410-HM5-S01
• Connector: single plug, 8 pins for compatible harness connection
• Designed for bolt-on replacement with no ECU reprogramming

How does this replacement improve my ATV’s performance?

Replacing a worn or failed CDI restores consistent spark timing and reliable ignition, which helps with smoother starts and steadier idling. The upgraded ST chips and quality control reduce the chance of unexpected misfires or electrical instability when the vehicle is under load.

• Stabilizes ignition timing for consistent engine response
• Reduces stalling and misfire incidents during operation
• Maintains performance across varying temperatures and terrain

What are the technical specs and durability features?

The unit includes one plug and an 8-pin connector matching OEM specifications. Constructed from durable materials with tested semiconductor components, it meets FCC standards and is made to withstand vibration and outdoor conditions typical of off-road use.

• Number of plugs: 1; number of pins: 8
• ST chips and advanced manufacturing for stable operation
• Durable housing and internal components for vibration resistance

How do I install the CDI and what should I check after replacement?

Installation is typically a basic mechanical swap: disconnect the battery, unplug the old CDI, unbolt and install the OLIFANT unit, then reconnect the connector and battery. After installation, verify secure connections, start the engine, and check for smooth idle and consistent throttle response.

• Disconnect battery before beginning to avoid shorts
• Match connector orientation and firmly seat the 8-pin plug
• Test run to confirm steady idle and no misfires

Who is this for: This OLIFANT CDI box is aimed at owners, mechanics, and restoration enthusiasts working on Honda Fourtrax 300 ATVs from 1998–2000 who need a reliable, direct-fit ignition module. It suits riders who want a quality replacement when original units fail or for preventive maintenance to restore dependable starting and consistent engine behavior across both 2x4 and 4x4 configurations.