
This part being universal, it may require adaptations
Main Jet MIKUNI MKH147.5 — manufacturer reference N208099-147.5. Jet calibrated at 147.5 intended for carburetion adjustments on compatible carburetors. This precision part is used to adjust the amount of fuel injected into the main circuit, affecting the richness during acceleration and at full throttle.
A properly calibrated main jet is essential for healthy carburetion: it allows for adjusting the air/fuel mixture richness to ensure consistent engine response during load increases. Replacing or trying a different size is part of the standard steps during tuning after modifying the air filter, exhaust, or ignition system.
Usage tips: check compatibility with your carburetor before installation. The jet screws into the carburetor body, and the adjustment should be validated through road tests and spark plug checks to avoid running too lean or too rich. Ideal for riders looking to fine-tune their engine safely.