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Im putting in new cb seats with stainless valves and corresponding springs ik theres heat issues in the rmz 250 heads and abnormal wear issues so my logic is use cb seats and guides to mitigate heat and better transfer it to the case where it can be dissipated better and ss valves with correct spring weight for ss valves...

Furthermore its been banned in alot of places bc is been proven to a direct link to respiratory cancers and incurable and fatal ireverseable lung conditions ik this bc ive worked extensively with this material and processing this material in various formats and procedure.

Its actually copper beryllium for anyone whom wants the correct term and of metallurgical composition its commonly used in aerospace bc of its unsurpassed wear and heat capabilities also is ability to take drastic fluctuations in temperatures during operation