Triumphrat

nate440 · 09-16-2007

i recently just finished my 71 tiger chopper build. I installed a boyer brandson electronic ignition and it will not start. i have kicked the bike 1000 times to no avail. it will hit but will not fire. i have spark at the plugs, fuel in the mikuni carbs. but nothing. it hits but will not run. i used 6 volt coils that came with the kit, im not sure what the original coils are rated at. and wired it for negative earth ground. i believe that the bike was originally wired for positive earth ground. would this change in grounding matter? do i have the wrong coils? any help,tips, or advice would be greatly appreciated.

vinnyf · 09-18-2007

Only 3 things are needed to make an engine run - fuel, compression and ignition. But timing for each is pretty important. Make sure you're getting fuel, not just to your Mikunis, but into the cylinder. After 1000 kicks (!), your plugs should be pretty wet (you might make sure you haven't fouled them with fuel). Then, since you've probably just reassembled your engine, make sure that both your valve and ignition timing are right - a spark arriving when there's no compression will get you nowhere. And good luck with your "new" Tiger. Let us know how you progress.