I've got my bike and engine, but I can't get the engine running yet.
I've taken some pictures and set up a website to chronicle the project as I progress.
Check it out and let me know what you think. Motorized Bike (SpiderCast)
I'm not sure. I haven't had a chance to troubleshoot it yet. When I pull the pull cord it sounds like it's trying to start, but it never quite gets there. The guy I got it from said that the engine started, but that the string didn't spin. So, could be a bad clutch. Would that keep it from starting now or do you think it's just been sitting too long?
my guess and it is just that is that it fired for him. If it fired but couldn't get enough revs up the clutch wouldn't spin.
Here is what I would do.
1.Empty out his gas probably been in too long.
2.Put an ounce or two of new gasoline/oil mix in
3.give it a generous spray or two of carb cleaner into the gas tank.
4.Take the plug wire loose and pull that through the carb several times.
5.That should clean the gunk out of the carb.
6.Pour any gas left in the tank out
7.put in a couple of ounces of new gas into the tank
8.put the spark plug wire back on
9.try to start it (follow the starting directions ie choke settings).
If it doesn't start but tries you can repeat the steps, then if it still won't start go from there.
My experience is that the carb is most often gunked from leaving gas in it over the winter. Replacing the spark plug usually isn't necessary but it would be my number two move. I think most of the lawn mower shops rebuild the carb when it isn't really necessary.
Thanks a lot. I picked up some carb cleaner at lunch and I'll try that tonight. One more question for now. Any idea how much speed I could get out of this setup? looks like the engine might be about 1HP.
SUCCESS!!! Thanks for the advise deacon. I sprayed the carb cleaner in like you said a couple times. It acted like it wanted to start but couldn't quite make it. So I brought it back inside and took the spark plug out. It looked a little gunky, so I cleaned it and took it back outside. After that it started right up. The drive shaft was spinning too. Not sure if that's because there was no load on it or not. Next step is either building the engine cradle or or attaching the sprocket to the drive shaft. I think I'm leaning toward the latter.
Add a little Sea Foam, or Stabil to your gas. I can start my weed wacker in one pull after a long winter. Don't use more than recommended, and use half the recommended amount if you run the engines semi-frequently.
OK, so now that the engine runs I need to start thinking of basic design. I have the crank sprocket and the cassette from another bike, but I'm not sure either of those will give me quite the results I want. Anyone know where I could get a small sprocket for about $10?
he is right STABIL works great but dont use much..."shellacking" is the term for gasoline evaporating in an unused carb. the residue clogs jets (especially the little idle ones) and makes it a pain to start...