Keihin carb tuning. This document is an update of our first carb tuning document. Many thanks to Marc Salvisberg, founder of Factory Pro Tuning, for teaching me the finer points of using dynamometers and tuning carburetor equipped engines. Jets R Us for jetting and tuning. Any major engine modiications like higher compression pistons and racing exhaust systems may require minor jetting adjustments. Below is a screenshot of my spreadsheet for Keihin carbs (PWK, PJ, PE). This section features the PWK exploded views just to let you understand where the tuning components are located. The needle is described as the most important component, with its diameter, length, and taper affecting jetting from 1/4 to 3/4 throttle. meaning that there is a different circuit of the carb that is responsible for fuel flow depending on the amount of throttle opening. Settings for each Duncan Racing offers a guide to practical interpretation of the workings of Keihin PE, PJ, PWM and PWK carburetors. With this knowledge you should be able to tune the Keihin carburetor correctly and tackle common adjustment issues. jv640z vxshd bjyfxld 4mnb4m 7m zzbt he9p kxay5 el ngdtw