Radiator Replacement for Honda Rincon TRX650 2003-2005 and TRX680 2006-2021 Aftermarket

This radiator is an aftermarket replacement designed for Rincon 650 TRX650 models from 2003–2005 and Rincon 680 TRX680 models from 2006–2021. It is engineered to restore optimal cooling performance, helping prevent overheating during both trail duty and field work. Replacing a faded or leaking core with this unit supports consistent engine temperatures and dependable operation in tough terrain.

Built with a 6061 aluminum core and a welded, vacuum-brazed construction, this radiator delivers enhanced durability and corrosion resistance over the stock component. The high-density core and a thicker 26mm profile boost cooling capacity for climbs, heavy loads, and sustained service. As an aftermarket replacement, it provides a precise fit, easy installation, and reliable cooling performance for frequent trail and farm use.

Comprehensive Vehicle Fitment

Product Specifications

OEM & Aftermarket Cross-Reference Information

What's Included

This box contains the essential radiator assembly for the Rincon models listed above.

• Radiator Assembly

Note: Related cooling system components such as hoses, clamps, mounting hardware, and coolant are not included unless specified.

Why Choose This Aftermarket Replacement?

• Direct-Fit Compatibility – designed to bolt in with OEM mounting points and existing shrouds for a simple, no-mods installation.
• OEM Cross-Reference – aligns with the original 19010-HN8-A61 specification, ensuring reliable interchangeability.
• Premium Materials – 6061 aluminum core delivers improved corrosion resistance and heat transfer in demanding environments.
• High-Density Core – thicker, high-density core boosts cooling capacity under load and during steep climbs or long hauls.
• Durable Construction – welded core and vacuum brazed joints provide lasting strength and reduce the risk of leaks.
• Performance Restoration – restores reliable cooling performance that can prevent overheating and extend engine life in trail and farm use.

Installation Notes:

• Always drain coolant and disconnect the battery before removing the old radiator to prevent shorts and spills.
• Inspect and replace worn radiator mounting grommets and hardware to achieve a secure, vibration-free fit.
• Check all hoses for cracks or bulges; replace with OEM-spec clamps and hoses as needed to ensure a leak-free connection.
• Clean the mounting surfaces and ensure the radiator shroud aligns with the core for optimal airflow.
• When reinstalling, torque mounting bolts to OEM specifications for proper compression and to prevent leaks at the tanks.
• Bleed the cooling system after refilling to remove air pockets; verify there are no leaks and that the fan engages correctly at operating temperature.

Why Upgrade?

Running a worn or damaged radiator can lead to inconsistent cooling, boil-overs, and engine overheating, especially in demanding trail or field work. This aftermarket radiator restores cooling efficiency and coolant flow, helping maintain reliable operation and protecting the engine from heat-related damage.