Buildable
New Member
A word of warning to anyone in with the Australian model bikes, I don't know if this applies to the American or European bikes, the BMC air filter is NOT suitable for the RC390!
The BMC air filter is made from a hard non-compressible plastic whereas the K&N and stock filter are made from a compressible material. This means that as your bike moves around on the road the two halves of the airbox are going to be forced away from each other causing the airbox to split away from the body of the bike (you can see photos of this on my thread on engine performance). This means air is sucked into the engine around the air filter!!
Hopefully this thread will help save you the pain of replacing / fixing your own airboxes!
The BMC air filter is made from a hard non-compressible plastic whereas the K&N and stock filter are made from a compressible material. This means that as your bike moves around on the road the two halves of the airbox are going to be forced away from each other causing the airbox to split away from the body of the bike (you can see photos of this on my thread on engine performance). This means air is sucked into the engine around the air filter!!
Hopefully this thread will help save you the pain of replacing / fixing your own airboxes!