i don't really know where to start... lifAN vs Jialing. here it is in a nut shell.
head= lifan
cylinder= lifan there is a difference
cases= same
trans= same
crank= jialing
clutch=same
parts ready= same
winner= lifan (with the new 140cc lifan, and parts that are being made, the lifan will take over for the complete engine package for sure)
all of this is out of opinion, but a very well tested opinion. i was the frist that i know of to do many of the big cc/hp builds with the jialing/lifan mix, followed by uploaded pictures/video and dyno proof. NO one has proved more hp with a china mill yet. this is not a rant and rave by me, just an accomplishment..
i am not here to try to make money, if i can help you with a question about making power pm me or just ask. the people on this site have been very good to me, thanks