engine trouble

  1. Dr Gonzo

    Engine trouble

    So i just hooked up my new lightening CDI and it started up first try. I was letting it warm up and all was going well. After about 2 min the rpm shot up and the engine started smoking. I hit the kill switch and nothing. So i disconnected the Spark plug wire from the engine, still kept...
  2. G

    Engine Trouble bike doesnt start well

    I built a new bike about a week ago and have used it 5 times. each time it takes 5-10 attempts to get going. The first few times no matter how fast I pedal, the engine slowly dies down and stops. I've tried priming it but still takes many attempts. Could it be a problem with bad 2-stroke oil...
  3. F

    Engine Trouble Loss of power???

    So I bought a Chinese 80/66cc engine off of Ebay, and it ran fine, I got it up to 40 mph. After break-in, I changed the carb out from the stock one to the hp one, and also added a boost bottle. When I started riding, It wouldn't go above 20 mph and the acceleration was super slow compared to...
  4. kuliffix

    How to Motorized Bicycle

    Hello guys, I also built a motorized bike. In these videos is a sort of guide on how to assemble a engine kit for a bike, In which are shown issues that I had to deal with during the montage and their resolves. The bicycle rim was a testing one, to test out how the engine and all the parts...
  5. akiem

    Engine Bogging down with no power under throttle

    Hey guys, I'm kinda new to the scene here but just a couple months ago, i purchased a cheap chinese model 49cc 2 stroke kit for my bicycle. I need it for my daily commute to work etc. Well, it ran perfect for about a month. Then, i started having carb trouble. First, i lost my idle screw...
  6. T

    On and off zoom

    Having an intermittent problem that is now beyond my troubleshooting, please jump in. 3 y/o motor (Grubee 5), 3,000 miles. Strong performance. Two weeks past I changed out the gas tank for a 2.5L. This week I had several seconds of no power (no bang). I double checked the gas shut offs (one on...
  7. Alexmeow

    Bike starts ok then dies down

    My motorized bicycle is an 80cc kit off eBay and I've been having trouble with it ever since I got it and when I thought I finally fixed it now it has a complete loss of power after about 15 seconds meaning it's top speed is like 8 mph and it can't go up any hills to save its life not even...

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