how are the Chinese atc 70 heads any one have experience with them.

[honda4h]

i'm looking at Chinese 70 heads are they any good ? thanks

[oscarmayer]

they will work as long as you find a matching to the Honda, I believe the lifan is the closest to the lifan. you can even look at cylinders. if you measure your stock length of the deck height of the cylinder itself, then you can find a matching alloy cylinder to run to help with heat and weight reduction. you can even find a domed piston.
sorry I can go on and on and on. we used to race these little motors for MX our first yr. (my son) I know a ton about these. there are so many things you can do, from CC increase due to larger bores to larger valve heads and cams and so on. we raced so I had to always build the baddest motor I could and every time I found bigger and better parts another motor was built. my son was learning about gearing and he had a habbit of blowing the motors by over-reving and floating the valves into the piston on the peak of jumps. good times back then...