Triumphrat

BikerMD

Hello,

I am new the the site and a proud new owner of a 2000 Thunderbird Sport.

It has around 10K miles and some bugs I'm trying to work out. Anyone in the NW Ohio (Toledo) or SE Michigan area that is willing and able to lend any expertise??

So far, I've gone through the carbs and now seem to have an intermittent issue with no spark. Still going through and looking at the normal culprits (coils, wires, pickup, igniter, alarm circuit?), but thought I would look for a local from the forum while I'm at it.

Based on what I've read on the forum so far, I am suspecting the igniter. When trying to start, it spins but does not even sputter. Checked #3 cylinder with an extra spark plug and no spark. I think the other two are the same, but will be checking. I am hoping I'm wrong about the igniter, since it started with no problems before disassebling and removing the carbs.

Any thoughts would be much appreciated! Thanks, Mike

petermholmes

If it started with no problems before disassembly, then the odds are very good it's something you did. I'd be looking for disconnected wires and blown fuses.

jonathanrsr

Mike,

If you haven't done so already, I'd start with your battery. Make sure it is cranking the correct voltage under load (I don't know what the minimum voltage would be). Read the starting problems on here, and frequently it is the battery.

BikerMD

It looks like the battery may be the culprit or at least contributing. My volt meter was reading incorrectly due the battery going out. Re-measured the voltage of the bike's battery and now only get 12V. After charging for a short time, I got a weak spark. That's progress!

Battery has been charging over night, so crossing fingers. It's supposed to be a newer battery, but not really sure. It's a wet lead acid...I'm not a fan.

Thanks for the input!

jonathanrsr

If you have to replace it, and are considering an AGM, check out the prices for an Interstate and a Yuasa, & get whichever is cheaper. Yuasa makes the Interstate AGM's.