I just bought a 2004 B&W 250cc. It's super awesome. Finding an aftermarket airfilter has been a little difficult, but the 250cc engine is used in several other vehicles - other newer Kymcos and some dune buggies. Parts should remain available for a long time. However, I haven't found the original manual to be very informative on things like belt size, roller weights, air filter intake, etc... but that's what Google and You Tube are for, I guess.