mpescatori wrote on 09/17/08 at 07:46:59:TMack, I may be wrong, but... the Honda only fired its spark on compression, right?
No spark on exhaust, compression only, right?
This means that, being a twin, it would fire every time the flywheel would rotate to a specific reference point.
The difference is the Honda would share sparks between its two cylinders, while the Suzuki only has one cylinder.
RPM Revolutions per Minute is referred to the engine crank => the flywheel, not the camshaft.
No, the Twinstar 250 engine has two parallel cylinders and the pistons both go up at the same time. One in compression , one exhausting. They have
one Ign coil wiith two HV wires coming out, that fires both at same time. So, they fire like the LS650 , on the exhaust & compression strokes. The flywheel pick-up is also like ours, so it fires every revolution. It is only different in that for every up-stroke there will be a power stroke result, first one cylinder, then on the next stroke the other, then the other, then the other.....
I'm trying to get people to understand that there are varying terminology that the manufacturers seem to use as they see fit.