1150 coughing and spuddering

[Carter Turk]

As suspected, the bike exhibited the same symptoms. It took about 7 miles for it to start cutting out.

I did even try the choke when it was cutting out, and it continued to stutter, and backfire.

I drained the gas tank, cleaned the petcock, disassembled the gas cap, removed the floats, and pilots, pulled the slides all to net nothing. I'm hoping there's still hope.

I guess my coils are likely the problem.

I have a stock set I could try, does it matter which coil goes to 1,4 or 2,3?

Or should I check the voltage first. Is there really anything else besides the coils that would cause this assuming the Dyna -S is almost new?

Should I not trust aftermarket coils or is 10 years a good run?

I did use the original O/W wire going to the switched 12V. If I were to bypass this and wire directly to the coils isn't there another O/W wire going to the starter button or run switch?

As always, thanks for the advice

[Rick]

I would start running down the ignition system as it seems you've covered the carb side of it...check the voltage going to the coils...how much voltage drop? if that is suspect you can jumper a lead directly from the battery as the system supplies the ground to fire the coils...no it doesn't matter 1-4 or 2-3 just as long as the correct ground wire matches the correct coil..the hot doesn't matter...remember the hot line going to the coils snakes its way round and round and to the run switch and I've found this stupid switch to be a pain in the a**..
What about those stupid screw-in wires to the plug caps?...or are those wires you have a 'better' style. Could they have been disturbed?...I found one once that the cap just fell off from corrosion at the connection...made for a very maddening symptom hunt....just some thoughts..
____________________________________________Rick.. .......

[Carter Turk]

I've nipped the ends of the wire inside the cap. They are NGK, but still have the screw in deal

[Carter Turk]

I just called Dynatek and they said if my coils were bad they'd replace them for $70 bucks. That sounds better than paying $155.

[raypen4]

Sea Foam and B12 (Berryman's) can both be found at ant good auto parts store. I know for a fact that AutoZone carries both items and they are both very good cleaners.

[Carter Turk]

While I wait for the new coils, I rigged up the old stock 1150's. Problem is they don't fit on the 83 frame.

I have one bolt holding them on.

I fired it up, it started willingly, so I went for a test ride. About 3-4 miles in I got on it about 95mph in fifth. It started to cut out again, so I backed down to 60, and it still was sputtering, probably running on 1 or 2 cylinders.

I got off the freeway and pulled over. Having taken off the gas and seat several times this week, I didn't feel like taking it off, so I just tryed to fire it up and ride home.

Fired up on all four, and took it easy home.

I haven't changed the plug wires in awhile and I ride in the rain alot, however I have trimmed then ends on occasion and haven't noticed any corrosion.

I guess these coils could be bad too, but seems odd they wouldn't work either.

[earlfor]

I did have one bike I couldnt get to run right. It would run out of power at about 60 mph like it was pushing a brick wall. The coils tested good and I had switched out everything on the bike and rebuilt the carbs, done all the homework, so to speak. I tried a spare set of coils that also tested good.
It made no difference. A third set of coils also made no difference. At the point I was at, my mind kept saying coils, so I ignored the multi meter and ordered a new set of coils. Guess what? The bike ran fine. It WAS the coils.
You never know until you try. :-)

Earl

While I wait for the new coils, I rigged up the old stock 1150's. Problem is they don't fit on the 83 frame.

I have one bolt holding them on.

I fired it up, it started willingly, so I went for a test ride. About 3-4 miles in I got on it about 95mph in fifth. It started to cut out again, so I backed down to 60, and it still was sputtering, probably running on 1 or 2 cylinders.

I got off the freeway and pulled over. Having taken off the gas and seat several times this week, I didn't feel like taking it off, so I just tryed to fire it up and ride home.

Fired up on all four, and took it easy home.

I haven't changed the plug wires in awhile and I ride in the rain alot, however I have trimmed then ends on occasion and haven't noticed any corrosion.

I guess these coils could be bad too, but seems odd they wouldn't work either.

[Carter Turk]

DynaTek confirmed today one of my coils was indeed bad. So they offered to sell me one for $35. I decided to get 2 for $70. They'll return the good one as well. Very cool.