K&N has developed a performance replacement air filter (YA-6608) for the 2008-2018+ Yamaha Tenere XT660Z with a 600 cc engine. K&N air filters are designed to increase horsepower and acceleration.

Part YA-6608 Product Specifications
Product Style: Round Air Filter
Height: 4 in (102 mm)
Inside Diameter: 2.813 in (71 mm)
Outside Diameter: 4.25 in (108 mm)
Top Style: Rubber
Flanges: None
Weight: 0.69 lb (0.31 kg)

Cross referencing K&N Air Filter YA-6608
BMC FM54908
Royal Enfield 573139B
Yamaha 11DE445100
Yamaha 11DE44510000

K&N YA-6608 fits the following:
2018 Royal Enfield Continental GT 535 - All
2017 Royal Enfield Continental GT 535 - All
2016 Royal Enfield Continental GT 535 - All
2015 Royal Enfield Continental GT 535 - All
2015 Yamaha XT660Z Tenere 660 - All
2014 Royal Enfield Continental GT 535 - All
2014 Yamaha XT660Z Tenere 660 - All
2013 Royal Enfield Continental GT 535 - All
2013 Yamaha XT660Z Tenere 660 - All
2012 Yamaha XT660Z Tenere 660 - All
2011 Yamaha XT660Z Tenere 660 - All
2010 Yamaha XT660Z Tenere 660 - All
2009 Yamaha XT660Z Tenere 660 - All
2008 Yamaha XT660Z Tenere 660 - All