Without redo-ing all the water routing.......You will need to put some restrictors in the 2 locations I have highlighted...use a small piece of a stock fuel line. inserted into the water line. in each place I highlighted......at the moment you have a free flow situation which does not pressurize the area before the 2.5 mm main jet, .....to force more water through that jet means you should restrict the out flow on the other Y joints.
View attachment 282396
yesfound this issue with the waterbox mod, it reduces the amount of cooling inside the box.
Trying to fin a 1/2 inch to 3/8 Y piece has been impossible, do they exist?
The lack of water means we need more water, faster, so the water pressure and jet size should solve this.
yes
i got 2 of them from xscream
$4 each