Kawasaki Z900RS Airbox mod page - (Ivan's airbox mod)
Want to know how to get rid of the airbox restrictions
that your stock Z900RS intake has?
Done, documented and tested by Ivan's Performance
The airbox on the Z900RS has a few deliberate detuning
items from Kawasaki that are not in the ECU.
They cost some midrange torque and restrict high rpm power as well.
(See all photos below for how to do these airbox modifications)
All 3 steps are needed to gain the hp & torque shown in the dyno
****THIS MODIFICATION SHOULD NOT BE DONE WITHOUT
FUEL ADJUSTMENTS MADE SPECIFICALLY FOR IT****
The only parts that you will need to purchase
Qty 2 - 14073-0881 outer velocity stacks
(Available from your Kawasaki dealer)
Qty 8) 92066-1389 airbox plugs
(Only needed if you want to close the holes
in the airbox lower at a later date)
(1) Equal length stacks work better overall than staggered on this bike.
(2) Adding (8) 7/8" holes in the specific locations as shown reduces
and can be reversed if desired with the parts listed above.
(3) This photo shows the divider on the stock lid...
This causes high rpm problems by preventing the cylinders from resonating
Modding the airbox as shown here does not work as
well as shown above !!
The opening is too large and causes turbulence and minimal gains.
See reviews for my Z900RS ECU flashes
Go back to my MAIN