Idle Circuit Screw Kit | Compatible with PRO-SERIES & BILLETRON Products 1970-1990-bultaco-pursang-esr3756445 0mm needle seat valve is

0mm needle seat valve is what came in the majority of dirt bike carbs ranging from 65cc to 300cc two strokes

Dominate every ride

Sold as a set with the guide pin

and custom builds

then assemble and ship a complete kit tailored to your needs

Idle Circuit Screw Kit | Compatible with PRO-SERIES & BILLETRON Products 1970-1990-bultaco-pursang-esr3756445 0mm needle seat valve isCompatible with PRO SERIES & BILLETRON Products Fine tune your idle with precision. This Idle Circuit Screw is a direct replacement for PRO SERIES and BILLETRON carburetors equipped with externally adjustable idle circuits. Machined for smooth threading and consistent control, it allows quick adjustments to idle fuel deliveryideal for dialing in cold starts, low speed stability, and off throttle transition. Whether youre replacing a worn screw or