![]() |
'90 Kawasaki ZR550 Zephyr, 12.5% opening
Chart Key | |
![]() |
Horsepower |
![]() |
Torque |
![]() |
CO% |
![]() |
K&N drop in filter, ND iridium spark plugs, carburetor bodies modified to accept screw-in main air jets, and jetting (at 12.5% throttle opening) |
![]() |
K&N drop in filter (at 12.5% throttle opening) |
at 100% throttle opening
at 25% throttle opening
at 6.25% throttle opening