I think it can be "ported" if you want to spend some

this engine is runnig well,and is on my 120y.

the engine you are talking is the gx, that im buiding, is almost there.



this photo was taken today.

Ahahahahahhh...

and where was the rev needle sitting?!?

Any head can be ported. Just use a dremel tool and some sandpaper...it doesn't cost much.

The head you describe has larger valves than a GX head. I suppose the ports are smaller though. Did you say they are round ports? See valve sizes chart

yes the ports are round just like a std a12 head.

the rev needle at 6000 rpm.

i haveasked if i can port the head because this head has the air galleries to exaust manifold.

If your goal is to make power above 6,000 rpm, a round-port is not the cylinder head you want.

You can port the heads with air passages. Cleaning up the bowl area around the valve stem will enhance the 2,000-4,500 rpm range.