Mikuni FJ8-6F09 Jet Needles - 62.3 Needle - 28.9 Length to Taper electrical-gauges-components-air-fuel-gauges 1996-1999 Ski-Doo Mach 1

1996-1999 Ski-Doo Mach 1

1995 Polaris Trail Boss 300 2x4

2024 Gas Gas EC 300

2023 Gas Gas MC 50

2023-2024 BMW S1000R

Mikuni FJ8-6F09 Jet Needles - 62.3 Needle - 28.9 Length to Taper electrical-gauges-components-air-fuel-gauges 1996-1999 Ski-Doo Mach 110mm 2. 516. 20mm 2. 516. 30mm 2. 475. 40mm 2. 210. 50mm 1. 949. 60mm 1. 678. 30 38 Spigot Mount. The Jet Needle controls the fuel mixture in the mid range 1 4 3 4 throttle position. The taper of the needle determines the amount of the fuel. For example: the thinner the diameter of the needle, the more fuel will be drawn. The thicker the diameter of the needle, the less fuel can be drawn.