Got Air?

Looking for an alternative to the restrictive combination of the Honda air filter and multi-layer wire-screen backfire element? Want something lighter and maybe a bit easier to install? Well look no more, helmet hair, Twin-Air has just what you need. Their dual-stage filter allows better breathing but equal filtering by using a free-breathing coarse outer layer of foam to trap large particles of debris, and a finer inner layer to trap smaller particles. The end result is equal filtering but with less restriction to air flow, allowing the engine to breathe better. CRF250 owners can take further comfort in knowing that the filter was designed for unrestrictive flow to a 450cc engine, so it should flow even easier to the smaller engine.

The Powerflow System includes a trick and lightweight aluminum support cage with a Backfire Filter that uses an inner layer of backfire resistant foam. This new support cage weighs nearly 1/4 pound less than the stock support cage, while offering less resistance to air flow. It also installs a bit easier, and locks firmly in place inside the air box for positive positioning. As an added bonus, you can even use the stock air filter on the Powerflow support cage.

I've been using Twin Air filters for my KTM's since 2000 (three per bike), and they have endured many cycles of cleaning and re-oiling without a single failure. This time I ordered the Twin Air Powerflow kit, consisting of the trick new support cage and two Backfire filters, giving me a total of three filter elements. Cleaning and re- oiling air filters is a messy job, but doing several at the same time is no messier than doing just one. I keep the plastic bags in which the filters come, and use them to store my clean and ready filters in a drawer right alongside the old dirty filters. Whenever I install a fresh, clean filter, I stick the old dirty one in the plastic bag from which I took the clean one. Then when all three filters are dirty, I clean and re-oil them all at once, storing the clean ones back in its plastic bag until they're needed. When traveling some distance to a race or fun ride, I usually carry one extra filter along, just in case. There's no telling when a ride may include a deep water crossing that might foul even a fresh, clean filter.

Twin Air also offers a fine little oil filter for the CRF450/250, for $8.95, and a full line of filter cleaning
products and oils.

There are numerous different brands of aftermarket air and oil filters available, and most of them are good, but I
doubt you'll find any better than those from Twin Air.

CRF's Only Review by Gordon Banks - November 2004
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