Kiro&Seeu High-Pressure Radiator Cap with Temperature Gauge — 1.8 bar, OEM-fit for Honda CR/CRF/TRX models

KIRO&SEEU's 1.8 bar high-pressure radiator cap with integrated temperature gauge upgrades cooling system control for compatible Hon-da motorcycles and ATVs.

This replacement radiator cap combines a higher spring pressure rating with a built-in temp gauge to help maintain stable coolant pressure and let you monitor coolant temperature at a glance. It’s made to match OEM neck dimensions and works with a broad list of Hon-da models across CR, CRF, XR and TRX lines so you can swap a worn or plain cap for added resilience and useful feedback while riding.

Which Hon-da models will this radiator cap fit?

The cap is designed to fit many Hon-da off-road and utility models produced across several years. It accommodates OEM-style radiator necks commonly used on motocross bikes and ATVs listed below.

• CR series: CR125R (1981–2007), CR250R (1981–2007), CR500R (1984–2001)
• CR/CRF small-displacement and youth models: CR80R (1983–2002), CR85R (2003–2007), CRF(150)R (2007–2009, 2012–2019)
• CRF and XR: CRF250L (2013–2017), CRF250R (2004–2019), CRF450R (2002–2019), XR650R (2000–2007)
• ATV/utility: TRX450R (2004–2009), TRX450ER (2006–2014), Rancher 420 (2007–2018)

How does a 1.8 bar cap affect cooling performance?

Higher cap pressure raises the coolant boiling point, allowing the system to operate at higher temperatures without vapor lock. That can benefit heavy-use scenarios where the engine runs hot, though exact effects depend on the rest of the cooling system.

• 1.8 bar spring increases system pressure compared with lower-pressure caps
• Higher boiling point helps prevent steam pockets under load
• Preserves coolant flow by reducing cavitation risk in hot conditions

What does the integrated temperature gauge tell me while riding?

The cap’s temperature readout gives a quick visual cue about coolant temperature so you can notice overheating trends sooner. It’s not a replacement for a full dash sensor, but it’s handy for pre-ride checks and monitoring during strenuous runs.

• Quick glance indicator for coolant temperature
• Helps identify rising temperatures before dashboard alerts
• Useful for trail riding, hard-packed laps, and towing situations

Is installation simple and what should I watch for?

Installation follows the same twist-and-lock motion as most pressurized radiator caps; remove the old cap only when the system is cool. Make sure the radiator neck and sealing surfaces are clean and compatible before tightening to ensure a secure seal and accurate gauge contact.

• Install only when engine and coolant are cool to avoid burns
• Clean the radiator neck sealing surface prior to fitting
• Verify mechanical fit with your model’s radiator neck diameter

Who is this for? Riders and mechanics who own compatible Hon-da motocross bikes or ATVs and want a robust replacement cap with a higher pressure rating and visible coolant temperature feedback. It’s aimed at off-road racers, trail riders, and utility-vehicle owners who need reliable cooling under stress and prefer an easy, OEM-style swap that also adds a simple temperature indicator.