Direct replacement M5thread carburetor jets (#30–#52) for Dellorto models 1488, PHBD, MAMB, UAUB and PHBG. Key benefits Smooth acceleration and stronger mid‑range power: correct jet sizing restores proper fuel flow and throttle response. Improved fuel economy: properly matched jets reduce over‑rich running and help save fuel during normal operation. Restores peak performance: manufactured and tested to help deliver optimum engine capability and keep outdoor power equipment running at peak performance. What this part does Replaces worn or incorrect main jets in compatible Dellorto carburetors to adjust the air/fuel mixture. Jet sizes cover #30 through #52, allowing tuning or restoring the correct fuel delivery for a range of operating conditions. M5 thread fits the listed Dellorto carburetor models for direct swap‑in replacement. Compatibility and specifications Compatible with: Dellorto 1488, PHBD, MAMB, UAUB, PHBG series carburetors. Jet sizes: #30 to #52 (select appropriate size for your engine and conditions). Thread type: M5. Manufactured and tested to support reliable engine performance. Practical use scenarios Routine maintenance: corroded or clogged jets on a scooter or moped with a matching M5 jet to recover fuel economy and throttle response. Performance tuning: swap jet sizes (#30–#52) when tuning a Dellorto PHBG or PHBD carburetor for changes in altitude, fuel grade, or aftermarket exhaust/air filters. Small off‑road or utility vehicles: restore proper fueling on ATVs, pit bikes or go‑karts that use Dellorto MAMB/UAUB carburetors to maintain consistent power delivery. Installation and selection tips Confirm your carburetor model (1488, PHBD, MAMB, UAUB, PHBG) and existing jet thread size (M5) before . Measure or note the current jet number; choose the replacement size that matches desired mixture or consult a tuning chart for your engine. Installation is a direct replacement; inspect jets for clogging, wear or damage and clean passages during service. If you need reliable, tested replacement jets for Dellorto M5‑thread carburetors, these #30–#52 jets provide the sizing range and fit required to restore smooth acceleration, better power delivery, and improved fuel economy.