Mikuni J8-6DJ30 Jet Needle for VM Round Slide Carburetors

The Mikuni J8-6DJ30 is a genuine Mikuni jet needle designed for VM series round slide carburetors ranging from 30mm to 38mm bore sizes. This precision-machined component is a critical tuning part that controls fuel delivery throughout the mid-range throttle position, from approximately 1/4 to 3/4 throttle opening.

Key Specifications:

• Part Number: J8-6DJ30 (also known as 6DJ30)
• Needle Length: 64.7mm (2.55 inches)
• Length to Taper: 26.3mm
• Series: #6 needle series
• Compatible with VM30, VM32, VM34, VM36, and VM38 round slide carburetors
• Material: High-precision brass construction

Features and Benefits:

• Genuine Mikuni OEM quality part manufactured to exact specifications
• High-precision calibration ensures accurate fuel flow metering
• Brass construction provides long service life and reliable performance
• Tapered design allows progressive fuel mixture adjustment as throttle opens
• Adjustable via E-clip positioning for fine-tuning air/fuel ratio

The jet needle works in conjunction with the needle jet to regulate fuel delivery during mid-range operation. The tapered design creates variable clearance between the needle and the fixed needle jet outlet, allowing fuel volume to increase proportionally with airflow as the throttle is opened. This needle is commonly used for carburetor tuning and rebuilds on motorcycles, ATVs, and other powersports applications equipped with Mikuni VM round slide carburetors.