The K&N BM-3117 is a panel-style intake element for the 313 cc single-cylinder BMW G310R and G310GS. It uses pleated cotton media with an application-specific sealing bead, so it seats in the factory airbox without modifying the housing. Since the oiled gauze is washable and reusable, you can clean and reinstall it rather than replacing a disposable paper element at every service. The manufacturer also states that no fuel management modifications are required to obtain the increased performance, which makes it a straightforward bolt-in upgrade for riders who want a BMW G310 cotton gauze air filter without a remap.
Year coverage for this part varies across published information, so confirm your exact model year with the manufacturer before ordering. The manufacturer lists the filter for the BMW G310R/G310GS 313cc, and installation time is listed at 5-10 minutes with a screwdriver as the only tool typically needed. Owners on user forums describe a more involved job depending on the model: on the G310R, removing the seat and then the tank cover provides access, while on the GS, the side flashes and tank cover have to come off. Plan extra time if you are already doing an oil change, since one owner combined the two jobs in about an hour.
The manufacturer states that no fuel-management modifications are required to obtain the performance increase from this high-flow element.
Per the manufacturer, the filter fits directly into the OEM airbox and uses an application-specific sealing bead for a precise fit.
Year coverage details vary, so confirm your exact G310R or G310GS model year with the manufacturer before ordering.
The manufacturer rates this filter as a simple DIY job, with a listed installation time of 5-10 minutes and a screwdriver as the main tool. Access differs by model: on the G310R, owners on user forums note the seat and tank cover must come off, while the GS requires removing side flashes and the tank cover, which one owner counted as roughly a dozen screws. Keep the sealing bead seated evenly when reinstalling the element, and make sure the airbox lid closes fully so unfiltered air cannot bypass the media.
