Originally Posted by
olev
Roelof - what exactly is the problem with Mugen filters in your opinion? are they passing too much crap through or just plain disintegrating? I have used them for years now since this is the only INS box that fits nicely under touring bodies and can't really complain, other than that the Mugen filters cost twice as much as anything else.
I've been oiling them with Valvoline motocross air filter oil, really nice stuff.
The problem with the Mugen filter is that the foam becomes unglued from the rubber neck when you clean them. It has gotten better but is still not perfect. Unfortunately, when you run Sedan, it's the only box that really fits under the body, especially with Picco based engines, where the carb sits slightly higher than on the Novarossi.
Power wise, the Mugen box is great.