2009 MODEL FLHTCU WITH: K & N FREE FLOW AIR FILTER, VANCE & HINES SLIP ON WITH 2 1/4" BAFFLES. PROBLEM IS BACKFIRING ON DE-ACCELERATION. SETTINGS ARE AT FACTORY SETTING FOR AFTER MARKET AIR CLEANER, EXHAUST, WHICH ARE 1.5 5 5.
Re: 2009 MODEL FLHTCU WITH: K & N FREE FLOW AIR FILTER,...
Settings ?? TFI .. I have same bike K&N ac wild pigs 2 1/4 bafle dealer down load my settings 2.5 ..3..4.... I hear burbling not backfiring .. I have welded a splitter at end of baffle ..
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Don't, If you want to improve the sound and performance, buy a pair of "slip on" free flowing mufflers. Cycle Shack, Vance & Hines, and many others make the mufllers. You never know when you're going to have to have a pair of "stock" mufflers and they are expensive.
general rule of thumb is to go up about 10 jet sizes,unfortunately it is a bit of trial and error,and you may have to swap out diferrent sizes to get the bike running right,(jets are quite cheap though)but first step about 10 sizes from standard,your local dealer should be able to tell you what jets are in it and supply replacements,if you change to a hgh flow aftermarket air filter you may have to change jet sizes again as changing the filter may effect the mixture ratio in the carbs,,hope this helps
about 3-5db but you must remember db is not a linear scale but logirythmic.
basicallyy the baffles will remove the harsh rasp off the pipe and make them deep in sound, when cold they will be as loud as normal but once they have some heat in them they quieten down
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