Gaslock J164 Motorcycle Radiator Caps
Noted for its high-tech precision engineering, advanced design and quality materials, German manufacturer Gaslock's new motorcycle radiator cap offers a unique and stylish look for radiator equipped water-cooled models.
They are easy to handle and install with a unique stainless-steel screen and beautiful UV resistant, fade free red anodized ring. Fitted with replaceable seals, they will fit a vast array of most water-cooled motorcycles.
Designed to open and relieve high temperature pressures at 20 psi or 1.4 bar, coolant escapes into a small holding tank. Once the coolant temperature reduces, a vacuum is created, and the coolant returns into the cooling system.
![]() |
Available with outer ring and breather mesh colorway options |
At 20 psi (1.4 bar), the coolant is allowed to maintain a higher boiling point temperature - due to higher pressures. This is a matter of physics. It is critical to control the pressure in order to ensure the integrity of the coolant system. These specifications meet SAE J164 standards.
Designed and tested extensively over thousands of cycles, each new cap is tested after assembly before shipping, to ensure proper function and given a laser etched date code.
In addition to its standard product range, Gaslock can provide capabilities for specific designs for your needs. It can offer several different processes - including laser etch, CNC machining, anodizing and paint – and offer extensive laser etched and electro-formed design options and details. The company is open to hearing from customers to discuss preferences and needs in order to develop a unique radiator or gas cap to your specific design.
An OE manufacturer for select motorcycle brands, Gaslock has been in business for close to 30 years. The company's capabilities involve several different products for many different industries. "These gas caps require a high level of integrity which speaks to the versatility of our capabilities and extent of our engineering experience."
In addition to radiator and gas caps, Gaslock's additional product lines include accessory parts and level indicators.
GASLOCK