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MWR Air Filter Adjustment Kit

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Fitment Note: This adjustment kit is for MWR HE & Race Filters only.
Please read the description to get a better idea of if this adjustment kit will be useful for your application!

MWR Filter Adjustment Kit (4 each - springs, bolts, locknuts)

There are a multitude of reasons to order the MWR-500 Air Filter Adjustment kit.

Here's the short version:

  • More Power!!
  • Higher top speeds!!
  • Better throttle response at high speeds (above 80mph).
  • Cleaner burning engine - less wasted fuel.
  • Further balances power differentials between cylinders, adding durability/reliability (and power).

And here's the long Version, including how it works, and how to set your kit:

With the “Full Race Air filter” we developed a product that proved to be unbeatable.

Now we have further increased the gap with the competition.

With ALL current aftermarket air filters (including the std. MWR performance filters) we have seen visual proof and data showing the fuel from the upper injectors gets blown away due to the force of the incoming air.

If you open your airbox after a race , you will see the inside of the airbox is entirely wet with fuel that was blown away from the engine by excess turbulence.

With the introduction of the MWR “HE” & “R” filters it became clear that not only did all four cylinders get the same amount of air but also the fuel flow to the upper injectors was better, further increasing their effect, and improving performance.

Not only is the total airflow important, but also the flow of the fuel from the upper injectors. The better we “guide” this incoming air the bigger the effect of the upper injectors, resulting in higher top speeds and faster acceleration at high speeds.

After a long period of testing with our top teams we found that an adjustable plate could increase the effect of the upper injectors even more, so much in fact that top speed gains of 4-5 mph are possible.

By lifting the plate at the front the incoming air is forced to go all the way up to the top of the airbox and then falls down together with the fuel of the upper injectors so that almost no fuel is blown away from the engine.

This effect will be optimized further by lowering the rear of the plate.

Check your airbox again after a race, and notice that your airbox is almost completely dry on the inside.

Fuel adjustments are necessary, and can require you either richening or leaning the fuel supply. This all depends on the motorcycle, the design of the airbox, the position of the airfilter – the space between upper injectors & stacks and whether it has variable velocity stacks or not.

However tuning is rather simple, just use the information from your lambda numbers and correct - the power will come.

Quote from MAHI RACING TEAM INDIA (Kawasaki Factory Racing WSS 600) : “We had the filters tested by Akira Technologies and they told us to go use them as there was a considerable improvement from the standard race filter”.

There is one exception to the rule , the use of the adjustment kit for the 1199 Ducati Panigale with the High Efficient & Full Race filter.

The 1199 has a difference in fueling between front & rear cylinders of approximately 9 - 10%. The “HE” and “R” filters drop this difference by 6%, and with use of the adjustment kit you can open up the top of the plate and “guide” even more air to the rear cylinder. By doing this the engine becomes balanced with only a 1-3% power differential, and the engine truly comes alive.

Fuel adjustments are necessary, fuel adjustments of each cylinder separate are necessary.

With the std. ECU & Corse ECU this is not possible, therefore we advise you use an aftermarket fueling device with this capability.

On the dyno you will see only a small increase in performance with this kit, because the dyno’s airspeed simulation can only replicate a maximum speed of 90mph , yet the effect of this modification is most noticeable at even higher speeds.

Adding the Adjustment kit MWR-500 to the “HE” filters brings for the costumers a handy extra benefit. Customers can ride the bike with full power but when they go to a trackday at a circuit with strict noise regulations they can drop the plate to the minimum height (9mm). By dropping the plate to the minimum height the intake noise is reduced by 2-3 db. The performance of the bike will be in this case at the same level as with the original air filter.

The Adjustment kit MWR-500 includes 4 springs , 4 bolts and 4 locknuts.


Below you will see our advised basic settings for the Full Race filters. Customers can then modify the settings to optimize the performance to their own preference. By changing the height on the rear side you can change the character of the engine. We advise to adjust the rear of the plate not more than 2mm at single time.

Basic settings:
For all full race filters

  • Front : 26mm
  • Rear : 12mm


  • MC-110-10R (BMW S1000RR): Top – 16mm / bottom - 12mm (measured from the foam)
  • MC-022-12R (Ducati Panigale): Top – 26mm / bottom – 15mm
  • MC-061-12R (MV Agusta F3) : Front – 23mm / rear – 11mm
  • MC-080-13R (Triumph Daytona 675 13+): Top - 26mm / bottom – 15mm
  • MC-090-09R (Yamaha R1 09-11): Top – 26mm / rear – 15mm


It is quite hard to find the right settings for the High Efficient Filters because the plates are bigger . Most of the models have limited height space because of the construction of the airbox which may impede max adjustable height.

We advise to take the top-lid off the airbox, turn it up-side-down, place the filter up-side-down in its place and measure the distance between plate and airbox or air sensor, go from there to make the right height adjustment - as high as possible by not hit the airbox or air sensor is advised.

Note: We advise not to use the MWR-500 kit on these models, as no positive effect is going to be realized:

  • MC-110-05HE
  • MC-010-09HE
  • MC-050- 08HE
  • MC-100-09HE
  • MC-110-10HE

For customers with the MC-010-09HE & MC-110-10HE we recommend you buy the “R” plate for more performance.

We can advise the setting of a few models:

  • MC-010-04HE (Aprilia RSV Mille): Front – 21mm / Rear - 17mm
  • MC-120-10HE (Benelli models): Front – 26mm / Rear – 12mm
  • MC-022-12HE (Ducati Panigale): Top – 26mm / bottom – 15mm
  • MC-040-05HE (Kawasaki ZX6R 05-06): Top – 22mm / bottom – 12mm
  • MC-040-11HE (Kawasaki ZX10 11+): Front – 17mm / rear – 12mm
  • MC-060-10HE (MV Agusta F4 10+): Front – 26mm / rear – 12mm
  • MC-061-12HE (MV Agusta F3): Front – 23mm / rear – 11mm
  • MC-080-13HE (Triumph Daytona 675 13+): Top – 26mm / bottom – 15mm
  • MC-090-99HE (Yamaha R6 99-05): Front -12mm / rear – 26mm
  • MC-090-04HE (Yamaha R1 04-06): Front – 26mm / rear – 26mm
  • MC-090-07HE (Yamaha R1 07-08): Front – 26mm / rear – 12mm
  • MC-090-09HE (Yamaha R1 09-11): Front – 26mm / rear – 15mm