Mikuni FJ8-6FJ40 Jet Needles - 68.7 Needle - 35.7 Length to Taper chemical-filter-cleaner-oil Designed with fewer seams to

Designed with fewer seams to reduce pressure points

2001-2008 Yamaha YZ250F

Zinc plated

Wide non-slip rubber top plate hold the bike securely

Mikuni FJ8-6FJ40 Jet Needles - 68.7 Needle - 35.7 Length to Taper chemical-filter-cleaner-oil Designed with fewer seams to10mm 2. 51. 20mm 2. 51. 30mm 2. 51. 40mm 2. 36. 50mm 1. 98. 60mm 1. 49. Original TM38 Flatslide. 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.