Fits all Keihin FCR carburetors. Eliminates 99% of all bogging. 2003-2009 Yamaha YZ 450 F. 2000-2001 Yamaha YZ 426 F. 2001-2009 Yamaha YZ 250 F. 2005-2007 Suzuki RM-Z 450. 2004-2009 Suzuki RM-Z 250. 2006-2008 Kawasaki KX 450 F.
After installing the Athena jet my 2008 Kawasaki picked up horsepower and response. Is a complete atomization of fuel to both intake valves. I would recommend this 2 anyone who wanted to pick up more horsepower and response on their dirtbike.