Riveco presents the horn/klaxon for custom bikes, it fits all Customs (Yamaha, Honda, Kawasaki, etc.) on the frame, crash bars (different models vary).
This air supply (high volume low pressure) causes the horn to vibrate at a high rate of speed or frequency, the exact speed at which it vibrates is modified by the length of the horn or trumpet.

• Sound volume: 128 decibels (typically rated at 87 decibels)
• Use the original horn button
• Easy installation in 20-30 minutes. No drilling is required with the plug-in bolt-on installation
• The trumpets and brackets are triple chrome or black for optimal finish and long lifespan
• They are completely waterproof
• The air compressor creates instant air pressure to the horns
  
• Pressure is very low (12-15 psi), it offers a large volume of air (3 CFM per minute)

The kit includes:

• Two horns, air compressor
• Relay, simple wiring
• Fuse
  
• Complete installation instructions
• Self-assembly