#K and n motorcycle air filters how to#

+ 2 additional jet sizes (since we went up +6 main fuel jet sizes before the altitude compensation was factored in): The formula is: +1 pilot jet size increase for every +3 main jet sizes increased. Subtract: -2 main fuel jet sizes for Altitude of 2500' Average Subtract: -2 main fuel jet size per formula aboveД®quals: +6 main fuel jet sizes due to modifications, thus: XJ550 Seca Stock Mikuni BS28-series Carb Jetting:Д¤ into 1 with Supertrapp = +4 Sizes Main Fuel JetД®quals: +8 main fuel jet sizes above baseline Bike is primarily operated at an altitude of 2600 feet above sea level.

#K and n motorcycle air filters how to#

There are no guidelines on what or how to do these changes, this is true trial-and-error tuning!ДЄ 1982 XJ550RJ Seca using an aftermarket Supertrapp 4-into-1 exhaust and a single K&N air filter in the stock, unmodified airbox. You may find it necessary to make changes to the size or shimming of the main jet needle. Seriously consider purchasing a Colortune Plug Tuning kit. Bright white plug insulators are a sign of an overly lean fuel mixture condition and WILL cause damage to your engine over time, up to and including engine seizure! Check plug color often and adjust as needed, 2 main fuel jet sizes at a time and 1 pilot fuel jet size at a time. Otherwise, you'll like find that all of your efforts are going to be a HUGE waste of time. Make sure your carbs are in perfect working order before making jet aning fully cleaned internally and rebuilt, operating properly in their stock configuration, proper sized air jets and needles, etc. Decrease pilot fuel jet size by 1 for every 6000' above sea level. Increase the pilot fuel jet size +1 for every +3 main fuel jet size increases. Note that this pilot fuel jet rule is for the main fuel jet size change BEFORE any main fuel jet altitude compensation is factored in: Pilot fuel jet size changes are related only to the change in main fuel jet sizes according to the main fuel jet size formula described above.

PILOT FUEL JET SIZES CHANGES NEEDED PER TYPICAL MODIFICATION: If you put this filter on your bike, plan on doing some carb work. White as a sheet - with the baffled factory pipes. K&N Universal air filters are available in round, tapered (cone style) and. At 2,500 miles I pulled the plugs to have a look. How To Video - Dirt Bike K&N Air Filter Installation How To Video - Dirt Bike. Under a mis-match condition, such as when using pod filters with a 100% stock exhaust, or 4-into-1 header with stock filter and air box, then subtract 2 main fuel jet sizes. Hey everyone, a while back I put a K&N air filter on my 03 America. Decrease main fuel jet size by 2 sizes per every 2000' above sea level. Add up all the main fuel jet size increases and subtract 2 sizes. +4 main fuel jet sizes for individual pod filters (no airbox) +2 main fuel jet size for drilling holes in the airbox with stock filter +2 main fuel jet sizes for single K&N filter (inside a stock airbox) +4 main jet sizes for no muffler (open headers) +4 main fuel jet sizes for 4-into-1 exhaust

+2 main fuel jet size for custom 4-into-2 exhaust MAIN FUEL JET SIZE CHANGES NEEDED PER TYPICAL MODIFICATION: The following useful guide to rejetting was posted by Mrkil in the forum.