I've had good experiences with with bikeberry and also recommend pirate. Kings and gasbike, (same site, different address) I don't recommend at all. When I bought from them, I received a damaged (and later found faulty) engine. I wasn't even the engine I ordered. I ordered the black stallion and I got a GT-5. When I called a got the typical grammar challenged chinese lady who spoke little english saying "It upgrade" "Yes, it upgrade, better than other engine." So let me get this straight, I ordered an engine and you gave me a totally different engine, THAT'S FAULTY, without asking me or with any warning on the site. Thats the worst business idea ever. Idiotic if you ask me. So back then absolutely no one could get the Black Stallion even if they wanted it. So why even have that engine for sale??? I will never even visit that site again. If you get what you ordered, I hope it actually works, if you didn't, good luck with the non existent customer service. Now, back to the original thread.