jhimboden

I am having the stator checked at this time but I might be headed that way if I don't get good results from the test. Since I am from the USA the Elextrex is a bit pricy considering the exchange rate. But that might be the way to go. Regards. John

That is what I have narrowed it down to is the LT coil. Owning several British iron pieces and dealing with their little quirks I tend to check as much as I can before throwing in the towel. Several people have said a bad LT coil is rare. I guess that is my reason for taking so much time with the machine plus I learn something along the way. Regards. John

Well, I have put a new condensor on and moved the needle up one notch and then down one notch with no improvement. I did check the AC volts going to the HT coil when runnning at 1/4 - 1/2 throttle and she reads a little over 6 volts. Seem a bit low to me. Could somebody verify if that reading is within specs. Regards. John

Thanks for all the good tips guys. Hopefully I will get a chance to work on it in a day or two and let you know what happens. John

Thank you for your reply. I have the timing and points set at your numbers. I have moved the condenser to under the gas tank. I also have set up a single point ground as I thought the system might not be grounded correctly. Still misfiring. I am wondering if it's the LT coil.

Hello, my name is John and a first time poster. I've got an extensive post put will try to get to the point. I have purchased a 1968 sherpa T250(my first 2 stroke). Restored 2 years ago and has not been started in a year. I started the bike, fires up in 1 or 2 kicks, idles very well but as you come off the idle circuit it begins to miss(not backfiring) and misses through all throttle ranges. I have checked the amal carb and everything appears fine,good pilot jet and circiut,needle jet good(.106),needle good no grooves or wear, main jet good,no air leaks, slide is snug. Float is set at .080" below top of float bowl. I have several Triumphs, BSA's,Ariels,Matchless so I have worked on Amals and am convinced it is not the carb. So I checked the electrics and this is what I found. Spark plug was a KLG B8ES gapped at .030"(changed to KLG BP5ES gapped at .020"), points gapped at .010"(I have changed this to .016"). The timing points opening was set at TDC(I have changed to both .110" and .130" BTDC). I thought this would solve the problem but it changed nothing. So I checked the ohms and this is what I find. Yellow wire-0.3ohms,green wire-2.0ohms,black wire-1.9ohms,spark plug-3380ohms. I also replaced the HT coil with a new one for my Triumph cub ET ignition systems and no improvement. I also put a new condensor and no improvement. Having gone as far as I can go I contacted Hughs Bultaco and talked to Hugh. I went through my sequence of timing and he said not to move the backing plate,to put it back in its original place and don't mess with it?? If this is true it is very hard(if not impossible for me) to set the point gaps and then to set timing without moving the backing plate. Am I missing something here? There are a couple of areas(very small) on the coil windings that I can see where it is discolored. This is where I am and don't have any more ideas. So any help would be appreciated. I am not at a computer very often so it may take a bit of time to respond to questions. Regards. John