What is the gain in HP and torque with this kit?
I have a stock 2003 YZ450F and wanted to know what kind of gains in HP and torque would come by adding this kit to my bike. Also what other mods would you recommend if i were to install this kit; pipe, cams, etc?
Over 4 years ago
Location: Portland, OR
It's really hard for me to give you exact numbers on what the HP and torque gains will be on a stock motor since Athena doesn't give us that information. If you want more specs you can always email firstname.lastname@example.org. As far as other mods, personally I would knock out the small things like the Boyesen quick shot, an air filter, an exhaust, maybe the power now system dial in your jetting then I would look into a big bore kit. All in all it's up to you but that my opinion.