Re: 03 W/FE290 runs betterw/o air filter?
Don't modify the box!
I drilled a 2" hole in the bottom of mine using the stock jet... I had to replace it because it ran like crap!
The Kawi FE engines are VERY finicky when it comes to air/fuel mixture,
either put the stock jet back in, or try a K&N filter!
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