I am about to install 150cc BBK on my 125cc scooter, which head shoud I use for best performance 125cc or 150cc? I have both of them and the 150cc head has larger valves but 125cc may improve compression? I know that my gy6 80cc(47mm) works better with original 50cc head rather than 80cc head but both of those use same size valves..
There's more at play than valve size and chamber volume. Domed piston with shorter duration and lift may benefit more from the larger valves. And vise versa...
Last Edit: Mar 8, 2020 19:20:47 GMT -5 by 2stroked
02 E-Ton Beamer, 70cc Polini Contessa ( by nelson ), modified, old model Technigas ( from 2strokd), 16(18)mm Mikuni carb #80 main, stock air box minus snorkel, stock variator with 7 gram rollers, unrestricted Honda Dio cdi. 48 MPH GPS verified. Thanks to all who have helped.
Senna1Rossi: Thanks renagade281!
May 23, 2016 14:59:12 GMT -5
Fox: I don't really know how to say this but straight. I am Dave's Girlfriend Kellilee and bluntly and VERY SADLY he passed away early Tuesday morning. I know he would want ya all to know this. Thank You Brent for befriending my love he was very happy on here!
Jun 18, 2016 16:26:04 GMT -5
Fox: www.gofundme.com/29mgf6b8 I hope it is ok to pass on his gofundme page link. If not you will un-post it I'm sure. Thanks again all!!
Jun 18, 2016 16:31:18 GMT -5