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thanks for response. I've been studying things and I think the relay may be the issue. Power is supposed to go through the ignition to the button. When the button is pressed, it allows the power to flow through the relay to ground. This energizes the coil creating a small electromagnet that closes t...

after studying the wiring diagram I'm, if anything, more confused. If I understand the relay operation, when you press the horn button on the switch gear, it completes the coil circuit in the relay, which closes the gate and allows battery power to flow to the horn. Power can't get to the horn butto...

Hello, I am helping a friend get her '77 R100RS running and rideable so she can sell it and I have run into a couple issues. First off are the brakes. The brake fluid was pretty grim so I pulled the calipers and took them apart (a link to a video about the bike is below). I expected to find the pist...

BTW, if you are interested in checking out the video it is here: https://youtu.be/HQ3FVhqwqE0

You didn’t mention the basics. Check the points gap and valve clearances. When they heat up, they close up. I checked the points gap when I set the timing. I posted a video about doing so to you tube on my channel. While true that I haven't checked the valve clearances yet (waiting to get the nod f...

When the bike loses power again, quickly (and safely) reach down and loosen the gas cap. You could be developing a vacuum in the tank under high demand. Kurt I'll keep this in mind and if other things don't work, I'll give it a shot, but the fuel level is so low that I can't imagine it would create...

I've started to review your video I found on youtube. One recommendation I have regards starting. I would not stand on the footpeg in order to reach the kicker. Over time, you will damage the support structure for the center stand which lets the rear tire touch the ground when on the stand. Current...

The plastic floats are a newish replacement for the older brass floats. The brass can stress crack which then lets fuel inside the float. Plastic floats have been around for maybe 5-8 years. There are two varieties based upon weight, one 11g and the other 7g. If the needle running down the center o...

I just found the part of the forum for pre-'70s bikes. Shaking my head at myself.

Hello all, I'm an amateur mechanic trying to help a couple people out with their bikes, but as is often the case, finding I often need help myself. Just because I might know a little more than them doesn't mean I know what I need to. :lol: I registered for this forum because I have a '72 airhead (I ...