Thanks again for all the info and links. I pulled a valve cover and found screw in rocker studs so I everything seems to tally with the various sources for 98cc's.
Now I just need to find a copy if Jim Hands book for so I can port them.
Is there a recomended maximum that can be skimmed from these heads to further reduce the chamber volume. I guess there will be a point where this becomes counter productive if piston to valve clearance becomes close and the piston needs more valve releif.
Also would these heads benefit from 1.65 rockers. I would be looking to combine them with something along the lines of a RA4 041 cam.
Cheers
John
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