I'm not going to limit the cc size just B/c of trx rod. I'll use whatever rod that needs to be used in order to make a 569cc engine happen. I've heard of yz490, cr500, and ktm 500 rods all being used on puma or saber motors. I'm not extremely familiar with which rod is best for the saber but I guess I should talk to Pete. But I was hoping to get some guys first hand opinions on their own saber builds. What they think about that motor. Is their anyone that can throw their opinions in? I'm thinking saber 569cc midrange port w/cr250 ignition and running on race fuel. (Sunoco supreme 112, VP c12)