Warm days = loss of power

[p_s]

This is part of my fear, that it is the Coils overheating, I have heard your story a few times and it sounds spot on with mine. I'll look for some cheap spare coils til I can afford a Dyna S. Thanks for the idea..

I ultimately want Dyna coils, because I think I'd get the same problem again on a hot day in traffic with another used old coil.

But still, if you have a spare, you can at least warm up the engine, wait for the problem, then swap in a cold coil (takes 1 minute if you don't mount it), see if it goes away--then at least you know and you won't waste more time and money looking for other causes.

[peterpressure]

I ultimately want Dyna coils, because I think I'd get the same problem again on a hot day in traffic with another used old coil.

But still, if you have a spare, you can at least warm up the engine, wait for the problem, then swap in a cold coil (takes 1 minute if you don't mount it), see if it goes away--then at least you know and you won't waste more time and money looking for other causes.

I just took her out for a ride, now that the sun is down and no issues, rode like a champ. I need to measure the R on my coils because my other concern is perhaps the PO did not realize points need a 5 ohm coil and use a 3 ohm instead from a newer bike. Its a mut bike so I wouldnt be suprised.

Tomorrow I'll measure the valve clearance and coils!

[peterpressure]

Accel Coils, 4.5 Ohms
Noticed the PO already converted to a Dyna S ignition, haha...

I'll take some pictures...

[tkent02]

I ultimately want Dyna coils, because I think I'd get the same problem again on a hot day in traffic with another used old coil.

Only if it's another bad used old coil.
Most of them work fine.

[peterpressure]

Ok, So I went to take my 78 GS750 for a ride, and its pretty hot out, so I knew I was in for trouble. Few blocks from home, stalled and she WILL NOT start. Battery is dead, went and got my car and a jumper pack, still won't start. I am starting to think my starter is bad in hot weather. The starter is PRETTY hot, is this normal?

I was on the way to change out my Valve Shims, so very soon, I will have that done too, just need to start her and drive her to my friends garage to do the job!

[peterpressure]

Finally some closure on my threads!!!

FIXED!!!

I Followed The "Dyna S Ignition System Testing" PDF on Dyna's website: http://www.dynaonline.com/skins/down...t/DynaSTSG.pdf

And was getting an intermittent problem where I had +12V on the white and black wires: http://www.dynaonline.com/skins/down.../DS3-1_3-2.pdf

Even when the Rotor magnet was facing away from the Modules. I traced this issue back to the old "Splice connector". The Red wire which powered the Dyna S was too loose to work. Heat made the situation worse apparently. Put in a new splice connector and it seems I have solved this one!!

Between this and the Recent Valve Clearance Job I did, The bike runs greeeat!!! http://www.thegsresources.com/_forum...d.php?t=127985