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it was bad diodes in the ignitor box. I replaced it with a second hand ignitor that I got for nothing and it has run like a champ ever since. I've put about 10,000 on the ticker since then. now it is in pieces in the basement. the compression is starting to get weak so I think it's time for top...

Bingo^^^

Bingo ^^

I live Duluth Minnesota, usa. Been in the 70's this past week. Rode through Jay Cooke state park; lots of hills and curves. Banning state park, again hills and curves. Iron range, north and south shore of lake superior. God i love this part of the world. :D

Leo. I wish it were as simple as that. The tank has been relined, new fuel lines, clean carbs and clear cap vent. The r&r was testing goofy so I replaced that too. I've a intermittant lack of power to the ignitor or ign coils but haven't been able to find the leak. A rewire may be the only cure...

Thanks everyone who responded. My neighbor was happy to see that it got a new, good home. Keep us posted, Yamchop.

Hey there. My neighbor has a '75 xs650 that he is giving away. The front end was wrecked about 15 years ago and has been sitting in his garage since then (unrepaired and now rusty). I don't want it cuz I'm moving and trying to minimize my shit and its pretty rusty (wheels, spokes, exaust...

Thanks Blue. I like more pdf's to add to my digital library:)

Okay, just for shits and giggles I tested the combined rectifier regulator on an analog meter at the 10x's scale. The 3 white leads to black lead read 30. Then the 3 white leads to the red lead show 30:wtf: This is not what clymer says I should be reading but the book recommends I should be...

Hey truck. Having been into the 34s and 38s more times than I'd like to admit, the 34s need rubber plugs covering both pilot jets. Good luck

Yup. Tested the pu coil. It read about 710 for each.

Well, the transistor tested bad, according to the posted link, so I replaced this with a new one from radioshak... No GO:wtf: Is it possible that the rect/reg could cause the fucked up spark? Remember, fully charged battery and ign is normal at closed throttle but as soon as I twist the grip...

RetiredG. Thats a good idea and I might do that but I've replaced with new glass fuses and there is continuity, no corrosion or cracked fuse connections in the panel. Its also a newer fuse panel that the p.o. spliced in, which I had to solder the splices because he had neglected to. Ottis...

Hey there Ottis. Check out "runs good then runs bad" thread. Sorry i haven't learned the link tool yet. I think it may be the ignitor or a bad wire somewhere. Spent some time tracing the ign circut today and revisiting connections, but nothing.

I'm in st paul by the fair grounds. I'll ride when I get the bitch to act right

Anyone else that can offer something helpful, i'd like to hear it.

Luketrash, My timing light does miss when I try to bring up the idle. I think theres an '82 pickup coil on this '81 because the 3 wires at the coils' connector are different than what clymer says they should be for '81 (match '82 however) The 82 pu coil is supposed have slightly higher ohms...

I did the 3 tiny holes. Reused the old bowl gaskets (were good), could a leak around the needle jet seat be a problem? Wouldn't it just leak gas out the throttle bore if there was a bad seal? (no leaks). Could the ignitor be to blame?

I'm telliin ya guys, all the jets are like new clean and the needle valves new from mikes... the carbs don't leak and they're clean...they HAVE to be, I did them both by the carb guide. Is it possible there's some shit caught in the pilot passages that chem dip didn't dissolve??? and pres. air...

Oops thats what i meant, 24mm . I've checked them twice.