Dellorto 17.5mm Slow Jet PHBN - (individual jets)

Dialing in your idle circuit and off-idle transition on a Dellorto PHBN carb? This is the part that does the work. The slow jet (a.k.a. pilot or idle jet) meters fuel at closed-to-small throttle openings — so if you're chasing a clean idle, crisp throttle tip-in, or fixing a lean bog or rich four-stroking off the bottom, this is where you tune.

This is a genuine Dellorto Ø 4mm slow jet sized for the PHBN 17.5mm carburetor family. Sold individually so you can grab exactly the size you need instead of a whole assortment. Precision-drilled brass keeps flow consistent jet-to-jet, which matters when you're stepping up or down a size or two to find your sweet spot.

Jetting is a two-jet conversation — the slow jet owns idle and the first quarter of throttle, the main jet takes over up top. Get the pilot right first and everything above it gets easier.

Specs:

• Brand: Dellorto (genuine)
• Type: Slow jet / pilot jet / idle jet
• Carburetor family: PHVA/PHVB/PHBN
• Carb bore: 17.5mm
• Jet body diameter: Ø 4mm
• Jet calibration size: 32, 33, 35, 36, 38, 40, 42
• Material: Brass
• Sold as: Individual jet (qty 1)
• Part #: 1160040 02