Mikuni J8-5FP17 Jet Needle for VM Carburetors Jets

The Mikuni J8-5FP17 is a genuine Mikuni jet needle designed to precisely control fuel mixture in the mid-range throttle position (1/4 to 3/4 throttle). This critical carburetor component features a specific taper profile that determines fuel flow—the thinner the needle diameter, the richer the fuel mixture, while a thicker diameter creates a leaner mixture.

Key Features:

• Genuine Mikuni OEM replacement jet needle
• Part number: J8-5FP17 (also known as 5FP17)
• Controls mid-range fuel mixture (1/4-3/4 throttle position)
• Compatible with several Mikuni VM model and OE Mikuni carburetors
• Precision-tapered design for optimal fuel metering
• Made in Japan
• Length: 62.30mm (2.45 inches)

This jet needle is an essential component for carburetor tuning and rebuilds. The taper profile of the needle works in conjunction with the needle jet to regulate fuel flow as the throttle slide rises and falls, ensuring proper air-fuel ratios throughout the mid-range throttle operation. Sold individually.