Hi All, So this is my first time posting on here. I bought a Yamaha FZX250 Zeal about 6 weeks ago now because I liked the look of the bike and got it really cheap. The bike is now having spark issues and wont run. The bike originally didn't run well, but I was confident that I could resolve the issue as it was just a carburettor issue. So the story goes, I bought the bike. Got it home pulled the carbs off and found that whoever had worked on the bike before had not tightened the jest in the carburettors when they had worked on it so they simply fell out into the carbs. This was an easy fix and the bike ran better after this. To try and improve the running after that, as it was still only running on 3 Cyl at idol I pulled off the rocker cover to check valve timings and clearances. I also had to take off the alternator to align the engine to TDC. Not finding any issues I replaced everything and then tried to start it. Then it wouldn't start. I checked a lot of things and found that there was only a spark on Number 2 Cyl. there was a very weak spark on the other cylinders but barely enough to see and not enough to actually fire. Thinking that I had caused an issue with the ECU I got a new one for a decent price and replaced it. This didn't change anything. I tried swapping the ignition coils next and testing them. Both coils have 12v supply voltage and when I swapped them over and checked the spark I got exactly the same issue. Next I thought that it might be the ignition lockout relay box that was causing the issue, so i sourced one of them and replaced that. Again no change, still just firing on Cyl No 2 and would not run. Then I thought maybe it was the pulse pickup coil in the alternator housing. So I measured this, I was getting 130 ohm resistance (specs on for this coil are 230 ohm) and 1.3-1.4V output when cranking. Not sure if this is correct because there are no measurements for this online. So thinking this was the cause I replaced that too. Now I have gotten to the point where I don't know what else to do. Nothing I do seems to have any affect and I have replaced almost the entire ignition system. The Spark plugs are also only about 2k kms old. I have also charged the battery, thinking maybe it was simply low battery voltage but the battery is new and that also had no effect on it. Does anyone have any ideas of what I can do next because I am lost now? I have run out of ideas and things to replace.