Hello everyone, first post here. I was wondering if anybody had any experience with Lifan engines and what their experience was. I have read all about how they are ISO 9000 certified and got all the tooling from honda on a patent that ran out after 30 years (ok, whatever). But, does anybody have any input on these engines. A big bore kit complete runs 350 to 550, but i can get a 90cc with 4 speed tranny for the same price, and still have my stock enging to put another 50 together as i start changing out parts on my bike. Any input would be appreciated. Thanks