Air filter rules

[Eric Kelcher]

Clarification of Supersport, Sportbike, Daytona 200 legal air filters.




increasing the opening of the airbox inlet size is an illegal modification. With the R6 the airfilter is installed in the outer wall of the airbox thuis making the air inlet. The stock air filter has a cone/top hat shaped restrictor/water deflector installed that determines the inlet opening to the airbox. While aftermarket filters are legal changing that opening size is not, thus a filter that has no restrictor on it would not be legal. At this time we are only aware of one company(BMC) that makes/made an air filter with the stock inlet opening,  BUT they also make one with an enlarged opening.

Per rules the stock inlet size must be maintained, that can be done by using the stock filter, the "stock cone" on another brand or using one of the filters that has the stock opening already.  Please see 4 attached pictures.

Stock installed in airbox, BMC with cone installed, BMC showing it removed, Aftermarket with no cone.

Likewise the 1st generation SV650 had air filter that was outer wall of the air box and needs to have the stock opening for SS competition. Any other bikes that have the air filter attached such that it makes the outer wall of air box would have same rules interpretation.

[Zaph]

What about running a stock airbox with no air filter in place, if the filter is just a standard flat element style.  Is that legal?

[britx303]

Im now wondering about "zaphs" question too.........

[britx303]

Nevermind....I found it in the RB. Yes Zaph,for supersport you still must use a filter

[Eric Kelcher]

Nevermind....I found it in the RB. Yes Zaph,for supersport you still must use a filter

Correct air filter, not screen, grill, homemade etc, it must be generally available filter with filtering media in stock location.