Purchased a new Pipercross foam airfilter, and on the recharging procedure with oil it states that you must spray the black side of the filter, the inside and outside of the filter is black, hence my question to you is which side do I spray with oil?

Just reminded me, that I need to buy some airfilter oil... Found these instructions, which may help you.


Pipercross Cleaning Instructions

The cleaning of a Pipercross air filter should be carried out as below. Failure to do this could result in damage to the air filter or even the vehicle.

Remove excess dirt by gently brushing the filter.
Apply cleaning additive (C9003 or C9000) liberally. Massage in with soft brush. Allow to soak for around 5 minutes.
Flush the filter out with warm water from the clean side of the foam to the dirty side.
Allow the filter to dry naturally (do not apply any heat to the filter!!)
Lightly apply dirt retention additive (C9007 or C9001) on the dirty (black) side of the foam.
Steps 2-4 may need to be repeated until the filter is clean. Do not over oil the foam as this will cause a lack of performance.

Thanks for that but which is the dirty black side of the foam?

The outer side will be dirty side as it sucks from the inside all the muck in the atmosphere.

Brill thanks lads, the outside it is then.......