Uni Filter Price: $30.95
The Bike: 2013 Suzuki RM-Z 450
Up until now, I hadn’t used a Uni Filter since way back in 1997, when my dad put one in my KX 60 (yes 60 not 65) and it ran like crap. At the time it was blamed on the Uni not allowing enough air into the little engine due to it’s 2 piece design. Could this have been a case of an over-oiled filter? I’d say it’s highly possible at this point, but the world will never know the true story behind this mystery. I have not used a Uni Filter since…
Uni Filter use instructions
As you probably already know the Uni Filter is two pieces; an outer layer that is course foam and an inner later that is a more dense foam. You can oil it as one piece or two. I prefer to oil it as two separate pieces personally. To start pour your air filter oil on your filter (wheter you do both at the same time or separate doesn’t change this) and work the oil through your filter(s) until whole filter is covered evenly. Do not twist the filter while working oil through it, twisting could potentially damage to seams, causing the glue to pull apart.
Your Uni Filter needs to be cleaned as two separate parts using cleaner, warm water and soap. Spray the cleaner on your filer, let the cleaner sit for a few minutes, then clean with warm water and soap. Uni recommends their cleaner, I’m not sure if this is necessary. If you have something you like to use to clean your filters that hasn’t caused you issues in the past, it should work with the Uni Filter without causing issues.
How did the Uni Filter work on my RM-Z 450?
Actually, performance wise, I couldn’t tell a difference vs stock, which is good. After the bad experience I had with my KX 60 years ago, I was very relieved when my RM-Z ran perfectly normal after installing my Uni Filter. On the dusty sand tracks I typically ride, the Uni Filter didn’t allow any dirt to pass through the filter and into the air boot/efi. That’s what an air filter’s supposed to do, so it passed that test as well.
Final Thoughts on the Uni Filter
If you haven’t found out yet, you will soon find out that your 2013 Suzuki RM-Z 450’s stock air filter is junk. Using my typical mineral spirits then soap and water cleaning method, the stock filter fell apart after the third wash. I have never had an issue like this before. After trying this filter, I have to put my long time dislike for Uni Air Filters aside and say that I was wrong. I now believe the Uni Filter is a good replacement or spare filter option for your bike.