How a motorcycle starts?

Question

I have a Honda CD 70 motorcycle (70 cc, 4-stroke, CDI, single spark plug, 1993 model).

I want to know about it's starting mechanism. I mean when I use the kick, what happens? piston moves? coils produce current? what CDI does? what is condenser? what produces the spark? What is the sequence of events that leads to start after I use kick?

What is the role of battery in start in this model? What if the battery is weak? Will that effect the start?

Answer 1

You're asking way to many questions. in the guise of one question. The electrical components (CDI, coils, condenser, battery, spark) all have to do with electricity. If you understand how a spinning magnet around a winding of wires produces electricity, then these will be explainable. If not, then you'll need a more in depth answer then you would ever get here. You'll learn the questions you're asking in a motorcycle mechanics course (MMI, AMI).
--One answer - The battery has "nothing" to do with producing spark, to start and/or run your CD70 motorcycle. The production of spark for that motorcycle is produced by the flywheel, while spinning around the stator. All street bikes are required by law to be able to light the tail light without the engine running (in case the engine dies on the side of the road, you can turn on the tail light to let other drivers see you). That's why your bike has a battery. If the battery is dead, the engine will still start.

Answer 2

The battery keeps current on hand for starting and helps keep the current flow steady, evens out the spikes like when a blinker is blinking..
The Kicker basically turns the crankshaft to make the pistons go up and down to get the motor moving.
The Coils take 12Volt and amplify that, so you have a hotter spark at the plug. The points, along with the condensor cause the coil to ground out so the voltage can flow to the sparkplug. That voltage jumps the gap on the sparkplug, creating a spark, and ground out back through the body of the plug and into the engine itself.
As you kick the pistons are moving as if running, but much slowers. They build compression and as the crank turns the ignition system (CDI) tells the coil to release the current. The plug fires and if all goes well the mixture in the cylinder explodes and forces the piston down and the engine begins to run.

Answer 3

cd70 strating problms

Answer 4

Go to:

howstuffworks.com

Type in motorcycle engine/motorcycle and you will definitely find what you are looking for.

Answer 5

http://en.wikipedia.org/wiki/BMW_motorcycles#Technologies

http://motorcycles.about.com/od/basicsofmotorcycling/ss/howbikeswork.htm

http://autorepair.about.com/library/a/1/bl651.htm

I think the above three web pages will help you answer your questions. Good luck!