One would have a very difficult time keeping the crank from hitting the ground with a frame that large and wheels that small. this 49CC kit was a BIG SURPRISE how easy and how much power it has, I weigh 215lbs and it zips along around 22 mph (40 tooth sprocket). Each BBR Tuning bicycle engine kit comes with a digital installation guide that takes you step by step through installing, adjusting, and fueling your brand new engine kit for the ride of your life. of the sellers have no idea what they are talking about and put too much jibberish out there that people listen to.

If an 800 Watt motor is properly geared it will increase the ride time by over 20% compared to a 1000 Watt motor with the trade off being that the bike will have a 20% slower top speed. However frame geometry can still be very different depending on model and manufacturur for the same size seat post tube. If you have room to fit larger than 10Ah to 12Ah batteries in the bike that will provide a longer ride time. Similar to an engine for a scooter or goped, you simply pull the starter chord and hit the throttle to go! To choose the sprockets for the fastest gear ratio the power of the motor and speed that it can propel the bike need to be calculated.Seller is not responsible for injuries and/or damages resulting from operating this motorized bicycle or bicycle engine kit. This is on the block generally you can find a casting on the head as well but sometimes they miss with that before they ship the bikes. Here's a frame proportions calculator that can let you know the general area you need in a bicycle frame size for your particular body build.

x 24 TPI threads for the freewheel to mount onto it, and I see that it is not threaded to accept a freewheel so I so not know of any way to mount one to it. My desire here is simply to educate so that we're describing things with the correct technical terms.

look at the very first post in this thread pay special close attention to the sentance "the serial number is cast on the block mine is under the transmission" maybe there you will find your answer. Startup is a breeze and you can stop the engine with a simple killswitch provided with the throttle assembly. I noticed a while back that most of the engines labeled 48cc were actually 72s but in the last few months I also found a lot of engines labeled 49cc to be 72s also. If the bike is used only on flat ground then the freewheel will not increase ride time by much, however if the bike is being used on ground that is not flat then when going downhill it will allow the bike to freewheel with the motor off which will increase ride time. If you would like I can make the kit without the sprockets and chain, and you can choose those when you pick up the kit?