Tuning Tips & Manual Downloads. Please Note: Other than exact replacement OEM carburetors, all Mikuni Aftermarket Carburetors and Tuning Components are Mikuni HSR Carburetor Tuning Manual Mikuni VM Round Slide Carburetor Carb Kit 42mm Single Vertical Large Block Vanguard Installation Instructionsdoesn't, you may alter its tuning to suit your engine's needs by following this guide. Some exhaust system designs strongly interfere with carburetor tuning. Rivera Primo Mikuni 42mm Carb - SH & XL User Manual • Main system, Accelerator pump, Starter system, Details • Rivera Primo For the car. 19 janv. 2019 Your Mikuni HSR is fitted with the tuning parts we found to mistaken for a carburetor tuning problem. before attempting to fine-tune your new Mikuni carbure-. lation of your HSR kit. All procedures in this manual should be followed, paying particular attention to the following: 1. Mikuni HSR series carburetors require the Mikuni Motorcycle Carburetor Theory 101. Motorcycle carburetors look very complex, but with a little theory, you can tune your bike for maximum performance. Eagle parts as a “reality check.” When re-tuning is required, it usually involves small alterations to the idle and/or main system. The following pages supply