I have an 81 XJ550 Seca that I have fighting to make run for a while now. I cleaned and soaked the carbs and replaced the seals for the throttle shaft because I thought that was my issue. Now I'm encountering a weak spark. I followed the manual and tested the resistance in my ignition a while back and thought it was my end caps because they were reading a ton of resistance. After replacing with NGK end caps and resisitive plugs I'm still getting a weak spark. Coils tested good on secondary circuit but both tested 3 ohms on primary circuit which I think may be my problem. At this point I'm digging for any possible solution because its becoming a money pit. With a fresh charged two day old battery on the first push of the start button it will sputter for a second and that's all until I fully charge again. Even a squirt of starting fluid didn't do a thing.