I'm in Lexington, KY USA and the side stand has already been addressed. I'm going to go over everything, I have a manual and I am suspecting either the neutral switch or the CDI, I AGREE it's sounding like the CDI. Two questions:
Have you had any experience with the hyper tech CDI's?
And do you know what wires need to be swapped on the tach I got from mike to make all the lights work as they should?

I already emailed ZEELTRONICS about the PCDI-XT but with shipping and the conversion from us dollars it's probably going to be high. So I may have to go with the hyper tech CDI whether I want to or not!

Yes, I have 2 each Hyperpak CDI's one is new and unused, the other is only slightly used. About 1 month or so, then I got my Zeel. The Hyperpac are basically like the OEM model and work well. Made in New Zealand, long delivery time. Like 6 weeks.

If interested, pm me or email:steve@airsignal.net. I am in Oklahoma so it is only about 2 days away from you via USPS.

Wiring will only need slight change by adding bullet connectors in place of a plastic connector. I can plug in a hyperpac or a zeel, same connectors.

Don't know about your tach wires, just have to ohm them out and see what does what and swap the wires around, pretty simple. I don't have the diagram for the DT tach. It is just lights. Usually black is ground and brown is +12 volts. Pull out the bulbs and look at wire colors. Maybe the bulbs can swap holes.

Steve

__________________
'84 XT600 is now bored to 2nd oversize and new OEM pistons and rings installed. No more smoking.

I just checked the coils and the pickup coil is over range at 232 so looks like it may be a a new stator

Yeah 350-400 us dollars, ouch! I'm calling a friend tomarrow if there is anyone to rewind it he will know. Or with luck he will have one in his attic of gold above his shop! Keeping my fingers crossed! I also emailed a guy in Canada that has one listed but it doesn't say old or new but states he is getting rid of all his Yamaha parts, he want 110.00 us for it. We will see if he even replies, I agree in putting a used one in!

G600 pointed out on the other site that maybe I had made a mistake and measured the pickups in series. And Yup that's exactly what my dumbass did, I just rechecked them and it turns out they are both within specs. So it is again looking like a CDI, I still want to rule out the neutral switch though. And I'm also going to run through all the wires and connectors and clean them up and put some dielectric grease on the plugs.

Tom,

You probably have the Clymer manual. I have one too. There are other errors in it as well. Nothing beats the factory manual. The Clymer is in error and why you checked the trigger coils in series. The factory yamaha manual has it right but it sounds like you have it figured out anyway.

Another tidbit I learned from the factory manual is how the anti-backfire on deceleration circuit works. The small diaphram on the side of the primary carb is tied to the secondary carb downstream towards the valves. When you close the throttle at high RPM, the vacuum supplied by the little hose running atop the secondary carb to the primary carb pulls the small diaphram in the primary carb and shuts air off to the low speed jet causing a richer mixture. This richer mixture is harder to ignite in the hot exhaust system.

If you have backfire problems, check the intake boots and the diaphram. A replacement kit can be ordered from Yamaha parts that includes all the fiddley parts and the diaphram. Also check the hose for leaks. I found the exact hose in bulk and replaced the hose on both my 86 and 84 carbs. If you need a bit of hose I may have some left over...have to check.

FYI, the screw on the bottom of the primary carb towards the front of the carb is a "FUEL" screw, not an "AIR" screw. Turning it out will richen the mixture with MORE fuel. An "AIR" screw would be on the carb intake side, not the carb output side and is just the opposite. Your 87 XT came with a brass plug that blocks access to the "FUEL" screw. My 86 had never been touched (until now).... many have been removed...

Just a few tidbits that may help others....

Good chat on the phone today....

Steve

__________________
'84 XT600 is now bored to 2nd oversize and new OEM pistons and rings installed. No more smoking.

And yes, I do have a clymer. Does anyone here have a free PDF download of the Yamaha shop manual thy want to share?