The original scooter air filter box is very well made to fit perfectly on the engine and provide enough air.
The problem is in the material of the original filter. The foam chosen to make a standard filter is not good and most of the pores of the filter are clogged and do not leak enough air for ..
ATTENTION: For Minarelli 250cc engine (Yamaha Majesty 250cc and other) fits only if the scooter is after 2000y.For scooter before 1999y., use springs with code 1386, linkThe kit includes:
3pcs white springs - 2500 RPMs - tourist
3pcs yellow springs - 3000 RPMs - sport
3pcs red springs - ..