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It's tough getting old but I do my best. My plugs were oil fouled not fuel fouled. Since the plugs weren't working it just pumped fuel out of the exhaust. Nasty.

This is what 49 years and 97k miles looks like Niro. If the fouling problem is still there you might want to consider the valve seals. My 750 was well taken care of over the years with the exception of the storage time. When a friend was following on his bike he told me he was huffing gas fumes...

Pay attention to this guy Niro, Brett knows what he's talking about. My k5 sat in my shed for 22 years before my son shamed me into doing something with it. After getting it running and functioning I was also fouling plugs every time I'd ride it. I rebuilt, thoroughly cleaned the carburetors and...

A hopeful update Bret, I believe I solved it. The front brake/clutch switch I'm pretty sure was the problem. I was looking at the starter motor safety unit but that didn't make alot of sense to me. I took the clutch lever off and drowned the switch with WD40. I'm trying to avoid taking the...

That's a good thought Brett and no I haven't tried stopping in another gear yet. I've taken off all of the crusty 50 year old electrical tape from the wiring harness and found nothing that would result in a short. I'm eyeballing the little square black relay or switch located underneath where...

Nothing happens when I put it in gear to get going again. Everything functions as it should. When the main fuse blows everything stops of course. Only when coming to a stop in gear and applying the front brake. Rear brake application doesn't pop the fuse. There's no jerking or coughing. It runs...

Well, I have to eat a chunk of crow pie now. I thought I had it figured out why I kept blowing my main 15amp fuse every time I applied the front brake. I replaced the front hydraulic brake switch and thought that was the problem. Oh no. I've been replacing just about every electrical component...

I grew up in Seattle in the 50s and 60s. Back in the day most people that I would talk to still thought we were throwing arrows and bullets at each other riding horses to work. I live about 40 miles away from Seattle now and had to drive into town the other day. Shocking what they've done...

Damn. 144000 miles. Your bro putting on 120000 definitely has a iron butt. I used to able to ride that much but I got old. I only have 96000 on my k5 but I'm not even in your game. Very impressive.

That's exactly the muffler brand that I have, Mac. I can't remember where I bought them from though. A long time ago. For some reason I even kept part of the box that the bike came in. Hanging on the wall in my shop. The company I worked for setup bikes for most of the many dealers around here...

I don't know about a "Y" adapter for the exhaust. I have a 4 into 2 muffler setup that I can't remember where I got it. Well made and looks good. The stock exhaust rotted away long ago. I never wanted to pay the prices for a OEM replacement. You look like your project is well under control...

I like it Brett. Beautiful machine. I used to assemble these bikes 50 years ago when there were motorcycle shops every 5 miles around here. I was able to run down to the piers in Seattle and personally pickup my bike in the crate and assemble it myself. With the Windjammer III and Calafia tour...

These rides will last forever if you take care of them. Watch the electrical stuff though. Over time stuff starts to degrade as the above posts were saying. I've upgraded the ignition, coils, some wiring, switches, and now my fuse holder. Little things like the small 1 inch (25mm) fuses not...

It's a easy conversion if you're into soldering. I used shrink tubing to isolate the connections. I don't like using crimp fittings. I would love to keep things original but I also want reliability. After 48 years and 96000 miles I've been doing a few upgrades with the electrical stuff.

I gave up on the 25mm 15amp glass fuses and soldered in a 4 slot spade fuse holder, the smallest I could find, I bought off of Amazon for $10. 3 spots for the bike and one blank. The best I could do finding the glass ones was auto zone and that was a small mixed package for $15. I couldn't mount...

Sorry to say but that's not a 73. It's a 1975. I know, I have one. Color and turn signals are not a k3. It's a beautiful k5. I'm sure you will have no problem selling it.

Scrolling through some of these older posts this was as close to my issue as I could find. I too have a 1975k5 with 96000 miles on it. It's never let me down and has been very reliable until a few days ago. I too kept popping 15amp main fuses. The bike crapped out twice in the middle of...

I guess my first question would be why was it welded? I recently did maintenance on my k5, cleaning everything up and lots of grease. Your stem looks exactly like mine with the exception of the welding.

I put one of those Dyna units on my k5 a few years ago. Real easy install. Several videos on YouTube showing the install and how to set the timing.

I've been reading these posts for a couple years now about the spark plugs fouling on these bikes. I have a k5 with 96000 miles on it ( original owner) and never had a problem until a few years ago when they started with the corn syrup (ethanol). Now I'm having the same issues. Mine is...