Glad to hear your getting some more goodies for your bike Lonewolf . The NT stock carbs are actually hard to beat for reliability and simplicity and easy to dial in if needed. I'm just happy if my motors run smooth/ LOL/
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I have a couple of high powered Vtwin Motorcycles if I want to go fast. I never feel comfortable going over 25 on a lightweight hard to see bicycle. I look at these Motorized bikes as mainly a pedal assisted Bike, whereas you can sit back and relax safely plodding along at 16mph and enjoying the fresh air and scenery, and not have to pedal, but still look at it as a Bicycle with a cool cheat motor.
These engine kits are also cool to implement them into
early antique looking Motorbikes from 1903-1929 kind of look, using Schwinn Panther or Worksman bike frames as example, here are two of them I recently completed. I am also close to done on a dark red Huffy Cranbrook bike with electric start and auto clutch. I just need to finish the Cranbrook up, all it needs is a wide Pedal crank set and install a battery somewhere. Its an addicting hobby for some and certainly I am hooked.
The key is to have a bike running smooth and reliable and then go for custom stuff in my humble opinion. Having a Chain hooked to a true CNC hub plus sprocket and a good skateboard wheel spring loaded tensioner ( easy to make if you have the tools) and good front and rear brakes. Grease the heck out of your rear Hub often too. This stuff is key in all my builds after trying one without the right stuff, I learned my lesson fast.
I also always add a LED tail light and headlight to all of them. You can certainly break 30 with a 36 tooth sprocket, but as you know you will give up torque. I run 40 tooth as they seem to be a good compromise. Lots of guys get 40 plus and if you add a jack shaft kit and have a 3 speed internal hub you can hit 50 plus...Yikes on Bikes... Post some picts of your Build.
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