Hi,
I will be posting results as i have both of these Headkits installed and am about to run them...
They are both 44mm big bore engines and both are 15.1 in compression...
The ADA Headkit comes with a SY cylinder head with one rectangle shape boost port and the PBU a ZH cylinder head with two narrow boost ports...
Both Headkits come with oval ported window piston's new rings,gaskets,copper ring,piston pin and clips,spark plug and compression dome of your choice..The ADA Headkit retails at about $250.00 and the PBU Headkit retails between $350-$430 depending where you shop...The PBU Headkit uses a Bm6a,Bm7a plug the same as our stock engine plug and the ADA Headkit uses a different type of plug a NGKR CR5HSA(not the plug that comes in the kit)....They both look micky mouse and look bling bling if that's what your looking for :twisted: I will post some numbers and results soon as im done(my mate has a radar gun)....Pics attached
DUBSAK :twisted: :twisted:
Linear Mode
This is a new Minibike videos website which was launched - 
