cant fit a cone filter to an XR4i...

you can get adapter things which bolt to the metering head, but they are more restrrictive than the std airbox imho and only there for bling reasons (they pricey too!)

i was thinkin of drilling the airbox, but figure i might aswell just leave the lid off completely... lol

ps its got a piperX panel filter not a std airfilter, so it looks quite cool too