Welcome aboard ! How long has this KE30 been sitting in this yard ? If it has been a long time, & the engines condition, is unknown; then there are several things You should do before trying to start it.
The first thing before even trying to start it, is to remove all spark plugs, & pour a little light oil, into each spark plug hole. Let it settle for fifteen minutes, so the light oil, can seep down through the rings, & wet the lower bore. Make sure there is oil in the sump, but if it looks old & very thick, then change the oil, & oil filter. Then take a socket & bar, & place on the crankshaft pulley bolt head at the front of the engine, & see if the engine turns over easily, clockwise, with no spark plugs inserted; which means there will be no compression.
If that all works so far, then hook up a battery, & turn the engine over with the starter motor.
If the engine spins freely, then there are two other things You need, which is fuel & ignition.
Undo the fuel line & turn the engine over with the starter motor, & ensure fuel is being sucked up from the fuel tank, at the rear.
Likewise, Hook a spark plug up to the output of the ignition coil, & earth the spark plug body, & check there is a spark across the spark plug.
If all good for fuel & spark, then replace all spark plugs & leads, & try to start it. However, before you try starting it, ensure the air filter is not blocked. If the air filter is in questionable shape, then remove it altogether, just for the first start.
Let us know how You fare, or whether You get stuck, anywhere, along the way.
Cheers Banjo