Any thoughts. Are these both direct bolt in. The 250 cc is suppose to be a crf 230 direct bolt on. Not sure which direction on my motor. My Honda engine looks like I need to get into the bottom end. Just wondering if a cheaper route would be one of these engines. Bonus being electric start. Also from what I've read, rear brake would have to be modified on the lifan 200, not sure about the zongshen 250. Also would prefer the power of the 250 over the 200. Any other modifications I should know about? Thanks for help.