Hi to everyone. Just thought I'd get on here and enlighten you all a bit about the Big Bore Kit shown and the video also. I am the guy in Thailand who put the video on YouTube and used the kit shown. My name is Eddie and I've done some extensive research and trial and error on making the little Honda CT125 wake up and bark. I've now had the BBK in my bike for over a year and have 6,000 Kilometers plus on the kit, most of those Kilometers in the mountains and off road trails North of Chiang Mai. The kit I used is put together from a shop here in Chiang Mai, Thailand called iTimgarage, they have a web site, and I purchased it from an on line shopping site called Shopee.co.th You can look them up on the Internet and see what all we are offered here in Thailand to modify our bikes. Sadly though, Shopee will not allow over seas shipping of any item listed. However, there are several other manufacturers of BBK from Japan that are every bit as good or better than what I have. They are expensive though, but if you want one, that is an option. The kit consists of a stock Honda CT125 cylinder, with the sleeve removed and a Kawasaki Z125 sleeve installed. The piston used is from Art Manufacture which has been making pistons for decades and it is a Kawasaki Z125 piston. The reason for the Kawasaki parts is the piston is larger than the Honda piston, yet you maintain the Honda stroke which gives you a 142cc. The Kawasaki Z125 is Kawasaki's version of the Honda CT125 engine design they've use for decades. Both engines are bullet proof. The stock Honda CT125 fuel injector is also replaced by a Honda ADV150 fuel injector, this is where the necessary extra fuel comes from. There is no need to have the ECU re-mapped as the fuel injector handles the extra needed fuel. None of this BBK modification will increase your top speed, but enhances the low end torque needed to climb at steady speeds on mountain paved roads and off road trails. After you install the BBK, you'll need to put on a decent exhaust pipe and iTimgarage dyno specs were the best with a headpiece that is 19mm. One other item that also helps and I'd strongly advise to use is to replace the stock 39T rear sprocket with a 42T sprocket. The Honda Wave sprockets are the same as what the Honda CT125 uses, so you can get the Wave sprocket for the CT. That combination totally changes the characteristics of the CT. It makes it a very capable off road bike and still able to travel paved mountain roads and maintain speeds. Now, being a guy who really wants to know what the engine can do, especially after seeing some of the modifications the Thais have done to their small bore bikes, I had my mechanic install a Hot Cam and re-map the ECU. He went one step farther and ported the head also. The bike now not only rips, it will do 110 KPH (65MPH) and pulls throughout the entire power range. If you'd like to see how my bike and my riding buddies bikes perform, you can watch our Adventure Rides on my YouTube channel: Lazy Dog Productions Hope this helps clear up some of the questions about the BBK....
. I'm super happy with the kit
