Dellorto Carburetor PHVA / PHBN Mixture Screw

The Dellorto richness screw for PHVA and PHBN carburetors allows for precise adjustment of the air/fuel mixture at idle and low RPMs.

Essential for proper carburetor tuning, it optimizes starting, idle stability, and acceleration response. A worn, seized, or damaged screw can make adjustment impossible and negatively affect engine performance.

This OEM-type replacement ensures precise and reliable adjustment for optimal operation of your scooter.

Features:

• Type: richness screw / air mixture screw
• Compatible: Dellorto PHVA and PHBN carburetors
• Precise air/fuel mixture adjustment
• Simple installation
• Direct replacement (OEM type)

Compatibility:

• Dellorto PHVA
• Dellorto PHBN
• Scooters equipped with these carburetors:
  • Yamaha Bws / Zuma
  • MBK Booster / Stunt
  • Yamaha Jog
  • MBK Nitro / Aerox