i bought the engine as is to tinker with and the previous owner hadn't ran the engine in prob over 5 years, not sure when ill have time to mess with it though because im going on vacation soon
yea it ran on just the bottom cylinders but i had to give a bunch of throttle, plus i think i remember zapping myself on the bottom plugs. and yes there was oil coming from the plugs so there was fuel mix there.
1985 aeto v4 yamaha 115hp, hard to start and backfires when i rev a little bit.
I unplug bottom plug wires when running and it doesnt change anything, top wires kill it.
compression is even (100-105) and bores look the same in all 4 (worn but nothing too bad) with endoscope.
swapped top and...