Hey there.
I am rebuilding a 850R, and would like to fit a newer head with more flow, eg. from the RN or RNC engine. Do anybody have any casting numbers to look for??? I know which year to look for, but everytime I ask on eg. eBay, they reply with another question: what casting number? Any other thing to look out for??
Thanks in advance, Jan
RN/RNC head for 850
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