What is the proper amount to shim my carb needles?
Original question by Dom Ochoa….My understanding from the tech clinic is I can buy brass washers at Radio Shack, but I can’t remember what the recommendation was about thickness. (By the way, I’m still running the stock exhaust) Mario wrote: Between .023 and .027 thickness is what most people use. Ted wrote: I have the covers off the carbs and plan to shim the needles about .020″ to richen up the midrange. Henry wrote: Mine measure .020 exactly! Scott wrote: The washer thickness is .020. Radio Shack sells them in a little plastic bag of various O.D.’s and I.D.’s. The washer you want to use is obvious. Dale wrote: I have found the stock needles work better or as good as an aftermarket. I would shim the needles with a brass #4 finishing washer found in most hardware stores. These are about .025 thick. I use these in my jet kit when a customer buys one of our exhaust systems. I would also suggest a K&N air filter to allow a bit more air flow.
