Factory Foam Kleen is designed for the serious off-road rider to use in conjunction with Rock Oil Factory air filter oil.
It is a superior high performance foam air filter cleaner.
Shake the can well and spray directly onto filter until completely covered and allow it to soak in for a few minutes.
Rinse air filter under a running tap until water flows clean, in extreme cases this may take more than one attempt.
Allow to dry naturally then re-oil