dear,
motor/engine make current for its own use, bike has 5 wires come out from engine,
why five wires?
are all of them keep same volt and current?
does the wires use directly to electronic circuit?
does ny 1 know those solutions?
(bike: yamaha, 80 c.c, made 1985, battery 6V 4amp)
Well uuh, we don't even know what make or model of bike you have!!! So, what kind of a bike are we talking about? A scooter or a real bike? Have you tried searching the Internet for your specific bike's make & model.... like maybe start with the manufacturer!!
Indeed Nigel, you memory is quite correct on both counts.
I fear "mamun2a" may have been swindled, the side panels
and air filter of the classic early Fizzy are very distinctive.
Grossly misled by an unscrupulous individual or he has purchased an extremely
rare "Hybrid" where someone has made a '85 look like a '77.
OK, in theory the cylinder head could of been bored out , or rather bored out and re-sleeved to accept a larger piston from another machine.
However...
This approach works well for 4-stroke engines but falls flat on its face for the 2 stroke cycle. Changing the volume of the combustion chamber in a stroker requires not only the adjustment of the inlet and exhaust ports but some serious modification of the exhaust pipe charecteristics. Other wise one ends up with an engine of larger CC that outputs less BHP than it did before modification. Flat spots in the rev range are another typical symptom of a mis- matched tail pipe, worst case condition will cause a "back fire" with the
return pulse from the exhaust arriving at the combustion chamber whilst the inlet port is open. This can occur whilst the engine is operating at speed and may only become apperent at specific points in the rev range.
Put simply , a bored out Fizzy is unlikely, but not imposibble.