250cc, 4 cylinder engine.
First off, I recently flushed the fuel tank and replaced the fuel filter.
On Monday night, returned home 2km with no issue.
On Wednesday I went to start in the morning, would not turn over (has been starting sweet in the week since cleaning tank and changing filter). I tried push starting in first, no dice. Took car to work.
Wednesday arvo, tried again. Like in the morning, starter motor turns engine over but bike will not start. Try push starting, get a couple backfires (flooded engine? pressure release, no big bang).
Today, start stripping the bike down. Fuel is definetly getting to the carbs. I pulled the leads to the plugs, all are providing a charge to the plugs (not much of a jolt compared to a cars leads). I also tried Aerostart into the cylinders. Removed plugs, they are a bit fouled (bike does run rich and lean sometimes), but the plugs are maybe 2500km old and are iridium plugs.
Maybe the 2 distributors are rooted (doubt that both could be, all leads give a similar jolt).
Maybe I have cracked the head? I still seem to have compression.
Warped the head? Head looks fine, no extra oil anywhere, no leaks on the ground.
Anyone got any other ideas? Otherwise I'll drop it down to K-tech at some stage.