Mikuni Small Round Main Jet Jets

Mikuni Small Round Main Jets are replacement carburetor main jets for tuning fuel delivery at mid-to-high throttle. Mikuni is a well-known Japanese carburetor manufacturer. These jets are commonly used on motorcycles, ATVs, snowmobiles, and other powersports and small-engine applications that use Mikuni carburetors with the small round jet style.

Key Features:

• Precision-machined brass construction for consistent fuel metering
• Small round body style designed for compatible Mikuni carburetors
• Calibrated orifice that sets the main fuel flow for wide-open and high-RPM operation
• Available in a range of jet sizes so you can fine-tune the air/fuel mixture
• A simple, low-cost tuning change after modifications such as exhaust, intake or air filter upgrades, or for altitude and temperature changes

Choose the right jet size for your carburetor and tuning needs. Installing a properly sized main jet helps improve throttle response, power delivery, and engine reliability. Use the options on this page to select the size you need.