Hi guys,

Hope you can help me. Bought a set of the great RHS 210 heads. They come with the stainless valves, Int 2.040 x 5.450 8mm, and exh 1.570 x 5.450 8mm. The issue I'm having is I have a cam in the 240's range with over 0.600 lift, and the rpm ramp rate is so vicious that I have valvefloat over 6200 rpm.

Is the only solution to go to Ti valves, and if so do I get both int and exh, and does the bronze guide material need to be changed at all???

Your help is much appreciated. We've tried a range of different spring types, but nothings really fixing the issue.