Getting First Start

Hello everyone,

I just finished installing my first bike engine, a 2-stroke 66cc Flying Horse that I bought from Bikeberry:

http://www.bikeberry.com/66-80cc-flying-horse-silver-angle-fire-bicycle-engine-kit-2-stroke.html

I have not been able to get the engine running yet. Any help would be greatly appreciated!

Here's what I've tried so far:

1. Checked for a spark from the spark plug - Holding the spark plug against the engine head and spinning the rear tire with the engine engaged clearly produces sparks.

2. Started with a fuelil ratio of 18:1. When that didn't work, diluted the mixture to ~30:1. I'm using synthetic 2-cycle oil. The oil container says it's meant to be mixed at 50:1.

3. Disconnected both kill switch wires.

4. Drilled a small hole (I think 1/8") in the cap of the fuel tank.

5. Removed in-line fuel filter.

6. Added hose clamps to fuel line connections.

7. Rinsed out fuel tank, then let it dry completely.

8. Tuned the carburetor (adjusted the clip on the injector needle to each of the 5 settings).

Questions:

1. Looking at the carburetor from the front of the bike (the side where the large pipe comes into the carburetor), there are 2 switches: a white plastic one that rotates 360 degrees, and a metal one that rotates from West to North (only 90 degrees of movement). The metal one is marked with an arrow <---> and chinese symbols. Which is the choke? And what is the other one?

2. What is the exact process for starting the motor? I've been trying to pedal with the engine disengaged (which is easy - the engine doesn't resist it), getting a little bit of speed, then engaging the engine by letting the clutch in. The engine immediately applies resistance and I can hear the piston moving, but it doesn't sound like there's any combustion. I tried opening the throttle to various amounts while trying to start it.

Thanks!

Luke

Yes, my carb is right side up =P.

Greg58 - Yes, this:

http://www.google.com/imgres?imgurl...MygCMAI&iact=rc&uact=3&page=1&start=0&ndsp=18

is my carburetor! It's hard to see in that picture, but there's a little metal lever behind the white one that I believe is the choke.

I followed your starting instructions (that's basically what I've been trying), and was still unable to get the engine started. It doesn't sound like there's any combustion going on. I confirmed that I'm still getting a spark out of the spark plug, and I can see gas flowing into the carburetor.

The folks at Bikeberry told me my engine might be flooded and that I should tip it upside-down for 24 hrs. to drain it. I tipped it over (with the carburetor taken off), and nothing has come out in the first 2 hours.

P_Wheeler said:

Have you tried pedalling really fast then dunping the clutch? It takes a fair bit of speed to get mine running.

Click to expand...

Yup, I've tried that. Occasionally the back wheel will just skid when I engage the motor. Most of the time, I engage the motor and can hear the piston moving, but it doesn't sound like anything is combusting, and the bike just grounds to a halt from the friction.

I looked at the magnet, but was unable to get it off - torquing the bolt over the magnet just turns the whole assembly, even if I hold the back wheel and chain fixed.

maniac57 said:

Remove the spark plug and turn the engine until the piston is at the TOP of it's stroke.(Look in plug hole with a flashlight)
Then see where your magnet is at TDC (Top Dead Center)
If it looks like the one in my link above, there's your problem.

Click to expand...

I got the piston to the top of its stroke (closest to the spark plug hole).

The magnet was in this position:
http://s29.postimg.org/q4w7r3hc7/photo.jpg

Thanks everyone for the help. I got it running today by putting some teflon tape on the threads of the gas outlet from the tank, and taking the engine head off, switching around the bolts, and tightening them to about 15 ft-lb.