I just put a 80cc 2 stroke engine kit on a bike and I can't get a spark from the plug. I think it might be the kill switch, if it is how do I bypass it?
Thanks for the response, how do I check if my magneto is good or not? If I hold the black and blue wire and pedal the bike should I feel a little voltage there?How are you checking for ignition? How do you have it wired now?
If you suspect the kill switch (doubtful problem) then simply disconnect it from the blue and black wire. I say doubtful because they don't fail as often as suspected here. Usually the problem is something else like the spark plug boot or bad connections at the splices of the blue and black wires.
Tom
when I let go of the clutch the engine makes different sounds at random. Sometimes I can't hear the thumps of compression and others I can hear the compression thumps really clearly. But when I can barley hear it, it's way hard to pedal. Is this normal?Do what Greg said then connect the spark plug wire to the plug. Lay the plug against the cylinder head cooling fins (the place where the wrench goes must touch the fins) and spin the rear wheel with the clutch engaged. If the ignition system is working you should see a spark at the plug's electrodes. It takes a good spin to generate a spark so spin the wheel as fast as you can either by hand or pedals. Of course this means suspending the rear wheel off the floor so having a helper might be a good idea.
Tom
You have a bad ground connection. Take a look at the black wire where it attaches to the magneto coil. If that connection isn't good then there is no complete circuit, until the kill switch makes one. While you're looking check continuity (ohm reading) of the coil. You might also have an open circuit in the coil windings (blue wire).Also a not so common problem that I have found in my buddies bike is that his bike won't run unless the kill switch is in. Even when disconnected it won't run unless the kill switch is pressed in.
Right I meant that when the kill switch is disconnected completely the motor won't run. I'll forward this information to him, but I think he is satisfied with his electrical tape fix ha!You have a bad ground connection. Take a look at the black wire where it attaches to the magneto coil. If that connection isn't good then there is no complete circuit, until the kill switch makes one. While you're looking check continuity (ohm reading) of the coil. You might also have an open circuit in the coil windings (blue wire).
If the kill switch is disconnected there is no way the engine will run by depressing the kill button. Did you word that wrong?
Tom
I have a spark now but the engine is making 2 different sounds when I'm pedaling. Sometimes it sounds like it's getting compression and turning fine but other times it sounds like there's no compression yet it's still hard to peddle.Below is what it should look like.