What sort and size Raptor did you use?

Not only did the 86 have a side stand safety switch,this switch had a warning light ,it's to the right of the neutral light in the speedometer.That being said I don't think it has much to due with your problem, I would be suspect of the spark coil/plug wire ,it may well be weak due to age. the coil to work well must build a strong field in the primary loop ,in a matter of milliseconds ,the faster the RPM the less time it has,so at idle speeds it could be producing a good spark ,but at higher speeds the spark could be falling off an not high enough to jump the gap at the plug.(the plug wire core is carbon impregnated fiberglass ,and can fail in as little as 5 years)I'd try swapping the coil off the bike they have that's running.You have fuel ,compression,that only leaves spark. If the CDI was toast the bike wouldn't run,the CDI retards timeing to help the bike start, and only advances the timing about 5 degrees @ about 5000 rpm ,that leaves the coil (has it ever been changed?). It's the number one suspect in my book.Did you replace the coil with a after market coil? or a used coil? either could be a problem. An aftermarket coil could have less resistance and cause flyback , that hurts proper operation of the coil and could damage the TDI.You could have a bad or loose connection, or a bad stock coil , which you could test, 1-7 ohms for the primary , 10,000 to 25,000 ohms for the secondary.

If you have issues in the future, stop by here first...it may save you some time.

Absolutely, thank you for the package!  I'll list them here for anyone and pass the savings on, so happy to be back on the road