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Should I keep the standard airbox or use K&Ns ?

airbox standard
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Should I keep the standard airbox or use K&Ns ?

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The main reason people junk the airbox and fit K&N’s is because fitment becomes troublesome because the 1100 engine is taller than the 750 so the alingnment is wrong. When K&N’s are fitted the engine becomes very sensitive to air pressure (barometer readings), making jetting adjustment neccesary when the weather changes dramatically, so when the bike runs fine in summer it will run bad in a cold european winter. Inside the airbox there is allways the same pressure to make sure the jetting/mixture is allways right under all conditions. As for the increase in power… you will gain some top end power, but low/midrange may suffer. I had to change the main jets from 112 to 140, and now need to stop at every tank station.

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