Bicycle Motor Refuses to start

Have you ever run this engine?

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If it ain't broke, and you mess with it long enough, it will be.

The sad part is that if the moter was in front of most of the members here, we would have it running or at least be able to tell you what your problem was, in 15 minutes

Not me I'm the worst novice here. But I was riding down the road yesterday and my NEW spark plug wire came out of the black box. The bike just died. Hard to say what is going on.

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visit my blog for Riding in the hood,... The home brew bike journal....http://frictiondrivebicycles.blogspot.com/ The deacon's fiction

Are you having the same problem I did, ie you have spark when the plug is out and no compression. But with the plug is in and with compression your clutch is too loose to turn the motor over. Are you hearing the motor turn over when you pop the clutch? It should almost sound like it is running. All I had to do was tighten the clutch.

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Deacan,
I wonder if your new wire is the kind without metal wire in the centre? I went to a small engine repair shop and he had a spool of the real stuff. Most automotive stuff is carbon fibre and that would not be held in place. Other than that I use a hot melt glue gun to seal it up at both ends. this really helped/stopped snow and splash from cutting out my motor. That hot melt stuff really works and I promise you that you will never have that problem again.

I think I mentioned this before ? If I didn't then yes. My top speed I got it to was 59.9km/h

I keep forgetting to get a proper screw driver to take that cover and remove that bolt.. Then again it's not on my top of my list of things to do..This is a last ditch effort before i dismantle it.

I have noticed that the engine could be actually burning gas. I noticed the bike will not smell like gas unless you let go of the clutch. If the pistons move up and down you smell exhaust but don't see any.

I've pretty much given up on the thing and I personally think it's beyond hope.
However I will try to remove that bolt/nut and jam the gear with a rag.
I will post back when I do it to see what I should be looking for or do next besides wanting to put the motor into low orbit.

I managed to get that nut off and whatever u wanna call it does move outwards but wont come off entirely. We had the gears jammed even and nothing. Not only nothing was accomplished but the gaskets pretty much feel apart in my hands..Very cheap they where.

We even took the magneto off to see if that would help and it didn't

Geez Mopedamauter, it really bothers me to see you having such a hard time.
This thread is getting so long now that it is getting hard to follow.
So you got the nut off, now that "whatever u wanna call it" has to come off to see if the key is broken. I guess you could clean it well and see if the keyways are lined up. If they are, I guess you could say that the Key is OK.
Do you know what a key looks like? Let's start there..OK?

I can't tell you what this key looks like if the I can get that thing off..This is what I'm trying to take out but it will not come out..I circled it in red with paint. I'm still trying to guess what these key ways are and if they line up...

Spray some penetrating oil on the place where the shaft and the "thing" meet and wait for a few minutes.

Find two pieces of wood that will wedge under the "thing", put the nut back on that shaft to cover the threads, and TAP the end with a hammer. The "thing" should come loose.

BTW- You are getting plenty of fuel to the cylinder from your explaination.

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If it ain't broke, and you mess with it long enough, it will be.

I have included a few pics to help you understand. The key is less than a 1/2 inch long, it's just a tiny little "key" that slides into the keyways so that the flywheel (the "thing" you want to remove) slides onto the shaft (which also has a keyway).You may notice that the keyway is damaged in the second pic.
The first and forth pic is what you want to remove, but keep in mind that these are not pics of our motors.
Another way you can remove your flywheel is to follow bikerguys advice but I will add this: make sure you wind the nut onto the shaft until the face of the nut is even with the head of the shaft. This is so that you do not mushroom the shaft as you hit it with a hammer. With your left hand, hold onto the flywheel so that you are holding the whole bike up so that as you tap the nut, the weight of the engine helps you in removing the flywheel. His wood idea is doing the same thing as it is putting pressure upwards,sort of pushing outwards. The reason the flywheel seems stuck is because the shafts are tapered (cone shaped). As the parts are tightened up the shaft tighten up on themselves. You are trying to give it a good shot with the hammer so that the shock breaks it loose. You could also try to find a "puller" as this is what they are made for.

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