engine trouble

  1. C

    49cc 4 stroke engine wont start... what do I need to do?

    I have a few questions as well, i'm very new to all this and have very little mechanical experience. 6 months ago the engine died on me all the sudden and would start back up when I would try. Since then, I gave up on the bike itself until this week since I'm wanting to get it fixed again...
  2. M

    Need Help With Motorized Bike Engine / Crankshaft Wont Turn

    Hi All, Let me try to explain my problem in as much useful detail as possible here. I'm not the most savvy mechanic, although this bike being quite fun and a pain in the ass has taught me a fair deal so far. I've been riding a seeutek motorized bike mounted on a Schwinn for approximately 100...
  3. 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...
  4. dlibs

    What went wrong? Bike will no longer start.

    Hello, First I would like to say thank you for allowing me to join the forum and become a member of the community. Motor bikes have been a hobby of mine for some time and I’m excited to be here. Now down to business: I cannot for the life of me figure out what went wrong on my motor bike...
  5. J

    Engine only stays one when pedaling!

    Hello, This is my first time adding a 2 stroke 66cc engine to a bike. I bought the kit and installed it. The problem is it will only start when I pedal and then release the clutch, but when I add throttle nothing happens, just the sound of engine changes, and if i stop pedaling the engine...
  6. J

    Motorized Bike Engine Trouble

    Hey. Im new to this site and I really like how it is set-up. I am having major problems with my motorized bicycle. I purchased it about a week or two ago from a gentleman on Craigslist. It ran fine and started up perfectly. Everything seemed to be working fine until I took it on a long ride. On...