The airbox needs supporting at the front. Drill a 6mm hole through the support tab at the front of the airbox
and fit a bracket, as per photo, to support the airbox.
For proper operation of the cooling system it is
necessary to bleed the circuit by each air bubble.
To adequately perform this operation proceed
as follows:
Fill the radiator with water and raising the kart
from the radiator side make the excess air
come out. Now top up with more water. Spin
the rear axle for a few seconds to release air
from the external water pump. If necessary top
up the radiator again. Do not close the radiator
cap.
Now bleed the cylinder head circuit. Loosen the
screw on the head (yellow arrow) and keep it
open until it comes out only water. Now tighten
the screw and refill the radiator with water.
At this point you can close the radiator cap.