7 - 8T U NLeak jet adjustment (accelerator pumpadjustment)The leak jet 1 is a setting part that adjusts theflow of fuel discharged by the acceleratorpump. Since the accelerator pump operatesonly when throttle is open, the leak jet is usedto adjust a fuel mixture ratio for quick throttleopening and is therefore different from othersetting parts that adjust a fuel mixture for eachthrottle opening (each engine speed).1. The engine breathes hard in quick throt-tle opening.Select a leak jet having lower calibratingNo. than standard to enrich the mixture. #105 → #952. Rough engine operation is felt in quickthrottle opening.Select a leak jet having higher calibratingNo. than standard to lean out the mixture. #105 → #115* For EUROPE** For CDN, ZA, AUS and NZStandard leak jet#60* #90** #1051Relationship with throttle openingThe flow of the fuel through the carburetormain system is controlled by the main jet andthen, it is further regulated by the areabetween the main nozzle and the jet needle.The fuel flow relates to the diameter of thestraight portion of the jet needle with the throt-tle 1/8 to 1/4 open and relates to the clip posi-tion with the throttle 1/8 to 3/4 open.Therefore, the fuel flow is balanced at eachstage of throttle opening by the combination ofthe jet needle straight portion diameter andclip position.SETTING
