totally spam/off topic
but I worked on a chaps Bambina that had half a Fiat Uno engine in it.. The guy could never get it going right/vibration crazy as -
IMHO opinion but noone would believe me is that the firing order was out of sync. it had half the crankshaft from the uno - but with the journals 180 degrees apart,
I stated it would have run much better having the journals siamese then you could have run the firing 360 degrees apart instead of firing at 0 degrees and 180 degrees then 540 of nothing until firing again. Noone would believe me and I wonder to this day if that car ever got further than a awesome idea that idled really rough..
remember that a 4 stroke has 720 degrees of rotation for a full cycle as opposed to a 2 strokes which are only 360 degrees for a full cycle..