Originally Posted by
RICHARD ZASTROW
PoWaKiD42, You can make the ignition, fuel input, exhaust system as simple or complicated as your knowledge wiil permit. High output 2-cycle engines are "elegant designs". Far more complicated than apparent.
You could use the programable electronic ignition, add electronic fuel injection and if you like, adjustable exhaust port timing. Add to that adjustable length tuned exhaust pipes to vary the powerband up and down the rpm range.
Personally I'd keep it simple on the first one. Reed valve intake, magneto ignition with timing adjustment, tuneable carburetor like Mikuni and an exaust system with a wide powerband rather than high power narrow powerband.
To repeat myself, try to get a copy of Blairs book (or other competent authority). Re-inventing the wheel is a waste of time and effort. All the port heights, tuned pipe geometry etc. is in there. Also, pay close attention to combustion chamber design (squish band size, clearance to piston dome etc.)
Basic engine volume ratios (crankcase volume / swept volume etc.).
Many important details involved. If you already have that knowledge ignore everything I said.
BTW, that Sportdevices CDI looks good.
Good Luck,