Mikuni FJ8-6DP01 Jet Needles - 62.3 Needle - 28.9 Length to Taper riding-apparel-headwear-hair-wraps 2009-2012 Yamaha YFM550 Grizzly FI

2009-2012 Yamaha YFM550 Grizzly FI 4x4 Auto EPS

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Rise: 16in

Mikuni FJ8-6DP01 Jet Needles - 62.3 Needle - 28.9 Length to Taper riding-apparel-headwear-hair-wraps 2009-2012 Yamaha YFM550 Grizzly FI10mm 2. 511. 20mm 2. 511. 30mm 2. 476. 40mm 2. 312. 50mm 1. 748. 60mm 1. 075. 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.