need a tci for 1980 650

title says it all. i think i need another tci. like to keep it cheap since im not totally sure thats my new problem. thanks

 

What are your symptoms? Do you have spark on all four plugs? Let's go through this by the numbers to determine if this is what you need. No sense shot-gunning it, you only waste time and money.
If you have spark, it isn't your tci.
Incidently, I rebuild TCI's and, should you need it, would be willing to offer my services.

 

Thanks Robert. I have spark at all for when I start it but the second I give it any throttle the spark in 2-3 vanish. As soon as it comes back to idle the spark comes back. I have no other idea what it might be. I will need your skills to rebuild, I have at least 1 that needs done and I think 2 lol.

 

Hmmmm....
Let's see here... it runs which eliminates carbs and compression.
First thought is an electrical ground is bad. Have you checked to see if you have good ground contact at all ignition related locations? Check at the coils, there is a ground ring terminal that occasionally gets left off (two black wires that clamp under the rear coil bolt). Make sure the TCI is getting it's ground (sorry, can't remember which wire that is).
Second thought is it may be poor solder joints in the TCI (a common occurance). You can open that thing up and inspect the connections, reflow any you find that look odd with a soldering iron. If still no joy, it is possible that the capacitors on the board are so badly decayed that it won't hold up under any load, necessitating replacement (which, for the modest sum of $30, I will do for you).
Check out your ground situation and correct any joints that have more than 0.1 ohms of resistance across them. I do hope you have made the wise investment in a maintenance manual (Haynes is cheap, around $20) so you can chase things and do so with knowledge.

 

i have a Haynes that is nearly worn out lol. the ground under the coils is there and good. i will check the ground at the tci. when i got the bike it didnt run, the tci had a visibly melted circuit (no spark). i put a new wiring harness and tci in it(had spark at 1-4 but no 2-3). put another tci in it started up and ran for maybe 15 miles but was intermittently doing the blubbering thing. it would run good, blubber for a few minutes, then run good again. i havent even been moving it. it will blubber, ill leave, come back the next day or whenever, start it again without touching it, and it will run like a striped ass ape only do blubber again later on.

video of spark loss(ive since tightened cam chain lol)

http://www.youtube.com/watch?v=u234nFVx0mk

 

Jason Did you try swapping the coils?

 

The video shows a very nice spark.
The intermittent issue could also be your carburetors. Have you gone through them and cleaned them thoroughly?
The 1-4 fires, 2-3 doesn't is either bad coils, caps or wires or it could be the TCI. Since you get all four to fire, I'm leaning toward the TCI.
Make sure that the caps, ignition lines and coils are all in spec and don't suffer with corrosion issues. Also ensure that the spark plug cap resistors are tight (little brass screw that also functions as the spark plug clip inside the cap). Unscrew the caps from the igition lines and make sure they aren't green. If they are, clip them back about 1/4~3/8" and see if you don't find clean copper. Screw in the caps and keep moving.
The TCI is becoming more and more likely the culprit but I want to be sure we eliminate any other issues first.

 

the carbs have not been gone through yet. i think i need to at least clean the bores since it takes a sec to idle down, like maybe a slide or two is slow fallin. the dang thing is runnin good this second so its hard to diagnose right now.

 

I would hit the carbs (pull them out and clean them!) as those slides should drop freely with a clunk. Not to mention that the floating idle (comes down slowly) suggests an over-rich mixture. Clean them well!
Running good? Is it reliably so? If not, you still have some way to go.
Go get'em!

 

no i have no faith in it continuing to get spark to all 4. its just running right now. lol