Description of Tubeless Tire Valve Stems for Bonneville Daytona 600 Monster 821 - Front and Rear
Fitment for More Motorcycles in Product Description. CNC Made from High Quality 6063-T6 Aluminum with Top Quality Rubber Seals to Effectively Avoid Air Leaking. 90 Degree Tubeless Snap-in Valves for Inflation and Checking Air Pressure. The Right Angle Bend allows Easy Access for the Pump or Airline. They Change the Angle 90° to Fill-up the Tires. ( the Original Tire Valves is Vertical, and Xitomer One is Horizontal to the Ground. ).
I was going to put these on a 1982 Suzuki gs1100 but the rubber shoulder doesn't fit in the hole. Even if I drilled it, it would be like this. it may still be too short to fit through the rim.
Pros
Tubeless 90 degree snap valves for inflating and checking air pressure.
The included O-ring, if you want to call it that, increases the diameter so the valve stem bore in the wheel should be closer to 11mm. This means it will not fit Aprilia 8.3mm wheels. The design seems good, but they don't fit 8.3mm wheels.
Pros
Suitable for other motorcycles in the product description.