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Best Motorcycle Radiator Cap of 2026
Last updated on 04/04/2026
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1
TOTHERIDER Motorcycle Radiator Cap Decorative Protective Cover Compatible with Kawasaki Z900RS /CAFE Z 900RS Z 900 RS 2021-2025 Accessories Water Tank Cover (Black)
TOTHERIDER
Why we love it
Excellent fit for Z900RS.
Rustproof and durable.
Aggressive appearance upgrade.
Main Highlights
Fit The radiator cap is compatible with Kawasaki Z900RS /CAFE Z 900RS Z 900 RS 2021-2025.
Water tank cover made of CNC machined aluminum, high-precision CNC machining, safer and more reliable. Rustproof, wear-resistant and corrosion-resistant, long service life.
Designed to replace the original cooler with more aggressive appearance.
Fits perfectly, enhances your motorcycle with the unique covers of the Z900RS.
Package Content:1 Piece Z900RS CAFE Radiator Cap Trim Cover with Mounting Screw.
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9.9
Exceptional
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9.9
Exceptional
TOTHERIDER
TOTHERIDER Motorcycle Radiator Cap Decorative Protective Cover Compatible with Kawasaki Z900RS /CAFE Z 900RS Z 900 RS 2021-2025 Accessories Water Tank Cover (Black)
Check Price
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Why we love it
Excellent fit for Z900RS.
Rustproof and durable.
Aggressive appearance upgrade.
Main Highlights
Fit The radiator cap is compatible with Kawasaki Z900RS /CAFE Z 900RS Z 900 RS 2021-2025.
Water tank cover made of CNC machined aluminum, high-precision CNC machining, safer and more reliable. Rustproof, wear-resistant and corrosion-resistant, long service life.
Designed to replace the original cooler with more aggressive appearance.
Fits perfectly, enhances your motorcycle with the unique covers of the Z900RS.
Package Content:1 Piece Z900RS CAFE Radiator Cap Trim Cover with Mounting Screw.
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Value for Money
2
Radiator Cap Aluminum Alloy Car Small Head Thermostatic Cover Automobile Pressure Rating Cap with Water Temperature Gauge Universal(1.1bar)+iseki,+red radiator cap+car radiator caps
KIMISS
Why we love it
Accurate water temperature readings.
Easy installation saves time.
Durable, high-quality materials used.
Main Highlights
【Professional Use】The thermostatic cap with water temperature gauge can let you know the temperature of the water tank accurately without starting the engine. formopar radiator cap
【Professional Use】The thermostatic cap with water temperature gauge can let you know the temperature of the water tank accurately without starting the engine. formopar radiator cap
【Easy to install】Radiator bouchon increase the boiling point. Inhibiting produced water bubbles. Easy to install, direct bolt-on installation, just remove your original one and install the new one. fortoyota radiator cap
【Professional Use】Silicone inner plug can increase heat resistance performance and enhance tightness of water tank cover. for mechanical water pressure gauge. Provides an accurate temperature reading of your coolant.
【High Quality Materials】Motorcycle radiator cap ， made of high quality aluminum alloy & plastic material for strength and durability.
【Professionally Made】As the water temperature drops, a vacuum will form inside, and the cover will open to suck water from the auxiliary radiator into the water tank to keep the water level balanced
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9.7
Exceptional
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9.7
Exceptional
KIMISS
Radiator Cap Aluminum Alloy Car Small Head Thermostatic Cover Automobile Pressure Rating Cap with Water Temperature Gauge Universal(1.1bar)+iseki,+red radiator cap+car radiator caps
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Why we love it
Accurate water temperature readings.
Easy installation saves time.
Durable, high-quality materials used.
Main Highlights
【Professional Use】The thermostatic cap with water temperature gauge can let you know the temperature of the water tank accurately without starting the engine. formopar radiator cap
【Professional Use】The thermostatic cap with water temperature gauge can let you know the temperature of the water tank accurately without starting the engine. formopar radiator cap
【Easy to install】Radiator bouchon increase the boiling point. Inhibiting produced water bubbles. Easy to install, direct bolt-on installation, just remove your original one and install the new one. fortoyota radiator cap
【Professional Use】Silicone inner plug can increase heat resistance performance and enhance tightness of water tank cover. for mechanical water pressure gauge. Provides an accurate temperature reading of your coolant.
【High Quality Materials】Motorcycle radiator cap ， made of high quality aluminum alloy & plastic material for strength and durability.
【Professionally Made】As the water temperature drops, a vacuum will form inside, and the cover will open to suck water from the auxiliary radiator into the water tank to keep the water level balanced
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3
High Pressure Radiator Cap with Temperature Gauge,Compatible with Honda, Kawasaki, Suzuki, Yamaha, Husqvarna Dirt Bike, KTM,Polaris Ranger, Motorcycle ATV Models,1.8 Bar Radiator Cap 25.6psi
ZIMGLOBAL
Why we love it
Real-time temperature monitoring enhances safety.
High visibility for easy reading.
Prevents costly engine overheating issues.
Main Highlights
1.8 HIGH PRESSURE RADIATOR CAP : Accurate read out in Celsius and Fahrenheit - This high-pressure radiator cap will give you real-time temperature monitoring with accurate readings in both Celsius and Fahrenheit (32-400). It has a bright color gradient meter that provides high visibility to assist you in understanding what the temperature of your engine means, and can help prevent costly engine overheating
Honda CR125R, CRF250R, CRF250X, CRF450R, XR650R | kawasaki KLR650, KX250, KX250F, KX450, KX450F, KX65 | Suzuki DR-Z400, DR-Z400S, DR-Z400SM, RM250, RMZ250, SV650 | Yamaha Banshee 350, Rhino 450 660 700, WR400F, WR450F, YZ400F, YZ450F, YZ450Z | Polaris Ranger, Does Not Fit RZR Models | KTM 250, 300, 350, 450, 500 & more vehicles 1.8 bar high pressure radiator cap
This 1.8 High Pressure Radiator Cap with Temperature Gauge makes it easy to keep an eye on your machine's temperature. Our innovative design gives you the benefits of a standard radiator with temperature monitoring on your 2 or 4 strok, keep your bike running smooth
The radiator cap was designed with a higher pressure rating than OEM cap to raise your coolants boiling point. This reduces boiling over and losing coolant
If the 1.8 high pressure radiator cap on your vehicle fails, please contact us for replacement. If you have any other questions about this 1.8 high pressure radiator cap, please contact us at the first time. This is not an original part, but a replacement part
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9.6
Superb
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9.6
Superb
ZIMGLOBAL
High Pressure Radiator Cap with Temperature Gauge,Compatible with Honda, Kawasaki, Suzuki, Yamaha, Husqvarna Dirt Bike, KTM,Polaris Ranger, Motorcycle ATV Models,1.8 Bar Radiator Cap 25.6psi
Check Price
Show More
Why we love it
Real-time temperature monitoring enhances safety.
High visibility for easy reading.
Prevents costly engine overheating issues.
Main Highlights
1.8 HIGH PRESSURE RADIATOR CAP : Accurate read out in Celsius and Fahrenheit - This high-pressure radiator cap will give you real-time temperature monitoring with accurate readings in both Celsius and Fahrenheit (32-400). It has a bright color gradient meter that provides high visibility to assist you in understanding what the temperature of your engine means, and can help prevent costly engine overheating
Honda CR125R, CRF250R, CRF250X, CRF450R, XR650R | kawasaki KLR650, KX250, KX250F, KX450, KX450F, KX65 | Suzuki DR-Z400, DR-Z400S, DR-Z400SM, RM250, RMZ250, SV650 | Yamaha Banshee 350, Rhino 450 660 700, WR400F, WR450F, YZ400F, YZ450F, YZ450Z | Polaris Ranger, Does Not Fit RZR Models | KTM 250, 300, 350, 450, 500 & more vehicles 1.8 bar high pressure radiator cap
This 1.8 High Pressure Radiator Cap with Temperature Gauge makes it easy to keep an eye on your machine's temperature. Our innovative design gives you the benefits of a standard radiator with temperature monitoring on your 2 or 4 strok, keep your bike running smooth
The radiator cap was designed with a higher pressure rating than OEM cap to raise your coolants boiling point. This reduces boiling over and losing coolant
If the 1.8 high pressure radiator cap on your vehicle fails, please contact us for replacement. If you have any other questions about this 1.8 high pressure radiator cap, please contact us at the first time. This is not an original part, but a replacement part
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4
GFARDMOTO Motorcycle Radiator Cap Cover Aluminum Water Tank Decorative Cover Compatible with Ka&wa&sa&ki Z900RS Z 900 RS Z-900-RS CAFE 2021-2024 (Black)
GFARDMOTO
Why we love it
Stylish upgrade for your bike.
Durable, high-quality aluminum material.
Easy installation with exact fit.
Main Highlights
(Compatible Models) Radiator Cap Cover: Z900RS/CAFE 2021-2024⚠Note: Please check the specific year and model of your bike before ordering
Premium Material: The water tank cover is made of high quality CNC aluminum alloy, which is corrosion resistant, rust resistant, durable, long lasting, and not easy to damage
[High Performance] The water tank cover can be used as a replacement part for an old or damaged cover. ✅ Radiator cover does not affect the heat dissipation and maintains good heat dissipation even during heavy duty driving. ✅ High quality materials and textured appearance will beautify the look of your bike and enhance your sense of fashion
[Easy Installation] No installation instructions required, no modification required. Guaranteed exact fit to factory hole locations Check the position and install the water tank cover
[Package Contents] 1 x Radiator Cap Guard Decorative Protective Cover
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9.5
Superb
Check Price
9.5
Superb
GFARDMOTO
GFARDMOTO Motorcycle Radiator Cap Cover Aluminum Water Tank Decorative Cover Compatible with Ka&wa&sa&ki Z900RS Z 900 RS Z-900-RS CAFE 2021-2024 (Black)
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Show More
Why we love it
Stylish upgrade for your bike.
Durable, high-quality aluminum material.
Easy installation with exact fit.
Main Highlights
(Compatible Models) Radiator Cap Cover: Z900RS/CAFE 2021-2024⚠Note: Please check the specific year and model of your bike before ordering
Premium Material: The water tank cover is made of high quality CNC aluminum alloy, which is corrosion resistant, rust resistant, durable, long lasting, and not easy to damage
[High Performance] The water tank cover can be used as a replacement part for an old or damaged cover. ✅ Radiator cover does not affect the heat dissipation and maintains good heat dissipation even during heavy duty driving. ✅ High quality materials and textured appearance will beautify the look of your bike and enhance your sense of fashion
[Easy Installation] No installation instructions required, no modification required. Guaranteed exact fit to factory hole locations Check the position and install the water tank cover
[Package Contents] 1 x Radiator Cap Guard Decorative Protective Cover
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5
AS Axis Spindleon Motorcycle Stainless Steel Radiator Cap 17730-14G00 Compatible with Suzuki GSX-R GSXR 600 750
AS Axis Spindleon
Why we love it
Durable stainless steel build.
Resistant to high temperatures.
Sealed plug prevents leaks.
Main Highlights
Radiator Cover Part Number: 17730-14G00.
Compatible with Suzuki GSX-R GSXR 600 750 Hayabusa GSX1300R King Quad QuadRacer.
Radiator Cover Dimensions: 60*45*26.3mm, Plug Diameter: 29mm.
Made of stainless steel, with a rubber seal for the plug, resistant to high temperatures and corrosion.
Used in the cooling systems of motorcycles, ATVs, and other vehicles to maintain stable cooling system pressure.
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9.4
Superb
Check Price
9.4
Superb
AS Axis Spindleon
AS Axis Spindleon Motorcycle Stainless Steel Radiator Cap 17730-14G00 Compatible with Suzuki GSX-R GSXR 600 750
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Why we love it
Durable stainless steel build.
Resistant to high temperatures.
Sealed plug prevents leaks.
Main Highlights
Radiator Cover Part Number: 17730-14G00.
Compatible with Suzuki GSX-R GSXR 600 750 Hayabusa GSX1300R King Quad QuadRacer.
Radiator Cover Dimensions: 60*45*26.3mm, Plug Diameter: 29mm.
Made of stainless steel, with a rubber seal for the plug, resistant to high temperatures and corrosion.
Used in the cooling systems of motorcycles, ATVs, and other vehicles to maintain stable cooling system pressure.
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6
SG Store Motorcycle Radiator Cap Cover 19045-MY3-621 1.1 Bar Compatible with Honda VT VF GL ST Model Motorcycle
SG Store
Why we love it
Perfect compatibility with multiple models.
Optimal engine cooling performance ensured.
Direct replacement for damaged caps.
Main Highlights
Compatible with Honda NX250 1988–1990, compatible with FL400R Pilot 1989–1990, compatible with CB600F 599 2004–2006, compatible with VT600C/CD Shadow VLX/Deluxe 1988–1997, compatible with NT650 Hawk GT 1988–1991, compatible with NC700X/XD 2012–2015, compatible with ST1100A 1991-2002, compatible with GL1500A/SE Goldwing 1998-2000.
Compatible with CTX700/D/N/ND 2014, compatible with VFR700F/F2 Interceptor 1986, compatible with VF750C/C2-CD Magna/Deluxe 1994–2003, compatible with VFR750F Interceptor 1986, compatible with VT750DC/DCA/DCB Shadow Spirit 2001–2007.
The radiator cap model 19045-MY3-621 is a direct replacement for worn or damaged caps.
Features a pressure rating of 1.1 bar to support proper engine cooling performance, the diameter is 49mm, height is 30mm, and the bottom diameter is 29mm.
Functions as a pressure control cap to maintain optimal coolant pressure in the cooling system.
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9.3
Superb
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9.3
Superb
SG Store
SG Store Motorcycle Radiator Cap Cover 19045-MY3-621 1.1 Bar Compatible with Honda VT VF GL ST Model Motorcycle
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Why we love it
Perfect compatibility with multiple models.
Optimal engine cooling performance ensured.
Direct replacement for damaged caps.
Main Highlights
Compatible with Honda NX250 1988–1990, compatible with FL400R Pilot 1989–1990, compatible with CB600F 599 2004–2006, compatible with VT600C/CD Shadow VLX/Deluxe 1988–1997, compatible with NT650 Hawk GT 1988–1991, compatible with NC700X/XD 2012–2015, compatible with ST1100A 1991-2002, compatible with GL1500A/SE Goldwing 1998-2000.
Compatible with CTX700/D/N/ND 2014, compatible with VFR700F/F2 Interceptor 1986, compatible with VF750C/C2-CD Magna/Deluxe 1994–2003, compatible with VFR750F Interceptor 1986, compatible with VT750DC/DCA/DCB Shadow Spirit 2001–2007.
The radiator cap model 19045-MY3-621 is a direct replacement for worn or damaged caps.
Features a pressure rating of 1.1 bar to support proper engine cooling performance, the diameter is 49mm, height is 30mm, and the bottom diameter is 29mm.
Functions as a pressure control cap to maintain optimal coolant pressure in the cooling system.
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7
Motorcycle Radiator Cap, Motorcycle Radiator Water Tank Cap 1.1 Bar Pressure Sealing Leakproof Replacement for Suzuki
Yosoo
Why we love it
Convenient installation without modifications.
Built to last and durable.
Excellent sealing prevents leaks.
Main Highlights
CONVENIENT TO USE: More convenient and practical, easy to install, brings great comfort for operation and using.No Drilling or Cutting Required.
HIGH QUALITY MATERIAL: The 16 PSI motorcycle radiator cap is made of high quality ABS and metal material, which is high hardness, oil resistant, strong and durable, ensuring long-lasting use. High-quality products provide you with quality assurance and longer service life.
EXCELLENT SEALING PERFORMANCE: : Motorcycle radiator cap is precisely manufactured for maximum tight closure, greatly prevent from overflow and leakage, stable performance and high reliability
PERFECT REPLACEMENT: It meets the original specifications, which can be directly replaced or damaged, easy to install and replace.
DURABLE MATERIAL: This 16 PSI motorcycle radiator cover is made of high quality ABS and metal material, which is high hardness, oil resistant, durable and durable, reducing the trouble of frequent replacement.
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9.2
Superb
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9.2
Superb
Yosoo
Motorcycle Radiator Cap, Motorcycle Radiator Water Tank Cap 1.1 Bar Pressure Sealing Leakproof Replacement for Suzuki
Check Price
Show More
Why we love it
Convenient installation without modifications.
Built to last and durable.
Excellent sealing prevents leaks.
Main Highlights
CONVENIENT TO USE: More convenient and practical, easy to install, brings great comfort for operation and using.No Drilling or Cutting Required.
HIGH QUALITY MATERIAL: The 16 PSI motorcycle radiator cap is made of high quality ABS and metal material, which is high hardness, oil resistant, strong and durable, ensuring long-lasting use. High-quality products provide you with quality assurance and longer service life.
EXCELLENT SEALING PERFORMANCE: : Motorcycle radiator cap is precisely manufactured for maximum tight closure, greatly prevent from overflow and leakage, stable performance and high reliability
PERFECT REPLACEMENT: It meets the original specifications, which can be directly replaced or damaged, easy to install and replace.
DURABLE MATERIAL: This 16 PSI motorcycle radiator cover is made of high quality ABS and metal material, which is high hardness, oil resistant, durable and durable, reducing the trouble of frequent replacement.
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8
DUZEPA Universal Radiator Cap with Temperature Gauge Leak-Proof Water Tank Cover for Car Motorcycle ATV UTV (1.1bar)
DUZEPA
Why we love it
Two-in-one gauge and cap.
Leak-proof safety feature.
Durable aluminum and ABS.
Main Highlights
2-in-1 Design: Combines radiator cap and built-in temperature gauge, allowing easy monitoring of temperature while sealing the tank securely.
Leak-proof design: the 1.1bar water tank cover prevents leakage and the built-in temperature indicator ensures the safety of the water tank.
Durable Materials: Crafted from sturdy aluminum alloy and ABS, resistant to wear and built for long-lasting performance under high temperatures.
Accurate Temperature Reading: Integrated gauge measures up to 200°C, delivering precise and reliable data for improved vehicle maintenance.
Universal Application: Designed to fit a wide range of vehicles including motorcycles, ATVs, UTVs, and cars, offering enhanced safety and convenience.
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9.1
Superb
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9.1
Superb
DUZEPA
DUZEPA Universal Radiator Cap with Temperature Gauge Leak-Proof Water Tank Cover for Car Motorcycle ATV UTV (1.1bar)
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Why we love it
Two-in-one gauge and cap.
Leak-proof safety feature.
Durable aluminum and ABS.
Main Highlights
2-in-1 Design: Combines radiator cap and built-in temperature gauge, allowing easy monitoring of temperature while sealing the tank securely.
Leak-proof design: the 1.1bar water tank cover prevents leakage and the built-in temperature indicator ensures the safety of the water tank.
Durable Materials: Crafted from sturdy aluminum alloy and ABS, resistant to wear and built for long-lasting performance under high temperatures.
Accurate Temperature Reading: Integrated gauge measures up to 200°C, delivering precise and reliable data for improved vehicle maintenance.
Universal Application: Designed to fit a wide range of vehicles including motorcycles, ATVs, UTVs, and cars, offering enhanced safety and convenience.
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9
Jadeshay Motorcycle Radiator Cap, 1.1 Bar 16 PSI, ABS + Metal, Black, Universal Fit for Motorcycles
Jadeshay
Why we love it
Universal fit for various engines.
Durable materials ensure long-lasting use.
Simple installation saves valuable time.
Main Highlights
[Universal Compatibility] The Motorcycle Pressure Sealed Radiator Cap is universal for different types of engine models to meet your needs
[Durable Material] The 16 psi Motorcycle Radiator Water Tank Cap is made of high quality ABS and high hardness metal, oil resistant, sturdy and durable, long lasting to use
[Easy to Install] The Motorcycle Leak Proof Radiator Cap water stop features a simple and durable design that is easy to install and use without complicated tools or operations to save time
[Excellent Sealing] The Radiator Reservoir Recovery Cap is precisely manufactured to ensure maximum tightness, prevents overflow and leakage, provides stable performance and high reliability
[Concise and Elegant] The 1.1 bar metal Motorcycle Coolant Tank Cap has a simple and popular appearance, is a great decoration for your motorcycle, makes it more attractive and eye-catching
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9.0
Superb
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9.0
Superb
Jadeshay
Jadeshay Motorcycle Radiator Cap, 1.1 Bar 16 PSI, ABS + Metal, Black, Universal Fit for Motorcycles
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Show More
Why we love it
Universal fit for various engines.
Durable materials ensure long-lasting use.
Simple installation saves valuable time.
Main Highlights
[Universal Compatibility] The Motorcycle Pressure Sealed Radiator Cap is universal for different types of engine models to meet your needs
[Durable Material] The 16 psi Motorcycle Radiator Water Tank Cap is made of high quality ABS and high hardness metal, oil resistant, sturdy and durable, long lasting to use
[Easy to Install] The Motorcycle Leak Proof Radiator Cap water stop features a simple and durable design that is easy to install and use without complicated tools or operations to save time
[Excellent Sealing] The Radiator Reservoir Recovery Cap is precisely manufactured to ensure maximum tightness, prevents overflow and leakage, provides stable performance and high reliability
[Concise and Elegant] The 1.1 bar metal Motorcycle Coolant Tank Cap has a simple and popular appearance, is a great decoration for your motorcycle, makes it more attractive and eye-catching
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10
OTOTEC Radiator Cap of Expansion Tank for Car 25330-3K000 2533038001 1K2N115205 Withstand 1.1Bar Pressure Metal Rubber Material for Durability Reliability Compatible with Hyundai
OTOTEC
Why we love it
Compatible with multiple Hyundai models.
Durable metal and rubber construction.
Easy plug and play installation.
Main Highlights
[Compatibility] This car radiator expansion tank cover is compatible with Hyundai, compatible with Accent, compatible with Amica, compatible with compatible with Coupe GK, compatible with Elantra MD; and compatible with Kia models: Carens, Picanto, Rio, Sedona, etc.
[OE] OE numbers: 25330-3K000, 2533038001, 1K2N115205, please confirm before ordering.
[Material] Made of metal and rubber material for durability and reliability. (Reason to buy: Long-lasting quality.)
[Pressure Resistance] Capable of withstanding pressure up to 1.1Bar, able to operate normally under different conditions.
[Easy to Install] This car radiator expansion tank cover can be plug and play, easy to complete the replacement installation.
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8.9
Excellent
Check Price
8.9
Excellent
OTOTEC
OTOTEC Radiator Cap of Expansion Tank for Car 25330-3K000 2533038001 1K2N115205 Withstand 1.1Bar Pressure Metal Rubber Material for Durability Reliability Compatible with Hyundai
Check Price
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Why we love it
Compatible with multiple Hyundai models.
Durable metal and rubber construction.
Easy plug and play installation.
Main Highlights
[Compatibility] This car radiator expansion tank cover is compatible with Hyundai, compatible with Accent, compatible with Amica, compatible with compatible with Coupe GK, compatible with Elantra MD; and compatible with Kia models: Carens, Picanto, Rio, Sedona, etc.
[OE] OE numbers: 25330-3K000, 2533038001, 1K2N115205, please confirm before ordering.
[Material] Made of metal and rubber material for durability and reliability. (Reason to buy: Long-lasting quality.)
[Pressure Resistance] Capable of withstanding pressure up to 1.1Bar, able to operate normally under different conditions.
[Easy to Install] This car radiator expansion tank cover can be plug and play, easy to complete the replacement installation.
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