After i put my bike carb conversion on and had it on the rollers it made 165bhp which is shit after sum investigation and back to the ol drawing board i thought ill do a compression test -basically i found the problem i compared them to my valver which had 180psi on each cylinder the williams made 110psi on 3cyl and 90psi on the other!so ive now got a nice project!so hopefuly after a rebuild i should see a power increase!!!