2000-2003 Honda TRX350 Rancher factory service manual, Page 55Get this manual
MAINTENANCE Wash the element in non-flammable or high flash point solventSqueeze out the solvent thoroughly, and allow the element to dry
Squeeze out
Apply approximately 20 (0.7 oz) of Pro Honda Foam Filter Oil or equivalent oil from the inside of the elementPlace the element into plastic bag and spread the oil evenly by hand
PRO HONDA FOAM FILTER OIL