Many of our trips in dusty and dry countries and on many sporting events and rallies we had the problem that fine dust kept on getting through the air filter and into the intake system. Sometimes with serious consequences for the engine. We have tried and tested a large number of air filters over the last few years. We found the solution to our dust problem in Australia. Unifilter Australia gave us an air filter to test that fully met our expectations. The Touratech Research & Development team used the Unifilter in all the races in the 2006 season and since then have found no dust residue in the air filter box. Another advantage of the filter、 made of high-tech foam、 is the long service life. The filter is not thrown away when its dirty but rinsed out、 lubricated again and used time and time again (you will find cleaning material and air filter oil below). So you dont just take care of your engine but also your wallet. In our opinion its an absolute must for off-road motorbikes!