I am in the prosses of building my 200X ('85) i have built the engine with 12:1 66mm piston, 27mm carb, ported intake, new valves, and a DG pipe now i am trying to decide how much lift i can get out of a cam with out hitting anything. I am looking at to choices: a 270 duration with .362 lift which i am pretty sure will work or a 280 duration with .375 lift but I dont know if it will hit. Can any one help?

 

You can go as big as 395 IN/EX but it requires better springs........Powroll sells both the cam and the springs.......With the setup you have going That cam and springs would top it off real nice!

 

Thanks for the input. I'll look into it.

 

on you cam lift issue, well also depends on if the piston
is dome topped or not, they have valve reliefs, but
they could not be enough to allow to big of camshaft