This company is doing nothing but selling a shoddy product and will not even answer emails concerning said product, which by the way is 2 stroke gasoline engine kits for bicycles... Talk about taking the money and running, this is it. Buyer be definitely be forewarned. This company will not stand behind its product.
In 2007 I was diagnosed with cancer, stopped flying commercially and needed something to do as a hobby. My brother in law showed me a bicycle he was putting together with a 2 cycle engine. I looked up the information and ordered a kit from Boygofast. I put it together and was so pleased I ordered 3 more kits. I put together 2 more bicycles and sold them. I ended up giving my brother in law the other engine in exchange for some mechanical work to my car.
In the time frame that I was doing this I ordered several parts from this company and got very fast shipments. I still have my bike and ride it once in a while. I had it stored for a whole year and it fired right up. I think they sell kits as good as any other and I never had a problem with them answering my emails. I have no complaints and if I was to order another one I would not hesitate to order from them, plus the price you cannot beat. I hope this helps any undecided buyers.