Another xs400 bobber.

So Im new to the xs world, but not new to Japanese bike world. I was looking for a 650 but hard to find one that isn't already butchered, so went with a 400. I'm sure I'll have some questions along the way which I'm hoping to have answered here . So far I've stripped it down most of the way, found that the right piston was basically rusted to the cylinder wall. Parts ordered for the motor and hardtail from voodoo vintage on the way.

 

Yeah I'm gonna hit it with a bronze wire wheel and see how it goes

 

Worked on my cylinders today, ran a hone through them. Also cleaned up one of the pistons that I'm using. Waiting for the other to come in the mail.

 

That's good to know. Where are they stamped? Are they different sizes?

 

I didn't see anything like that on mine, I looked them over very well. I think that might mean that the cylinders were oversized/bored. I was looking at a diagram from Yamaha and they a chart for cylinder diameters, A being standard and B being .025" over. Or something like that

 

Well I'm dumb, I looked over the cylinders again and found that stamp, it's not as clear but looks like a B. I also got a piston in the mail and they have some different letters but look identical and both fit the same in the cylinders, I checked with a feeler gauge.

 

Thanks, I'm guessing that the markings were scrubbed off the pistons, only thing visible is an arrow. I'll have to get a micrometer from someone and measure them

 

That's a good idea. I think my step dad should have one at his shop, if not I'll hit one the chains

 

So tonight is the night, I have everything I need to get the engine back together. I swapped the valves out of my head into the new one I got off eBay. I made sure to lap them and install new valve seals. Got my new piston rings on, new wrist pins, and then... Where are those new wrist pin clips I got in the mail yesterday? I've searched high and low and the only thing I can figure is they ended up in the trash when i cleaning up last night. how dumb can one man be?

 

Lol I was very excited, but I'm dumb. The clips I thought I threw away came in the mail the next day

 

I'm working on my wire harness while waiting for parts and trying to figure out the two plugs that are on the list side of the motor. One comes from the alternator and the other from the neutral switch and oil temp sensor or low level sensor? Trying to look for it in the manuals but can't figure it out. Does this plug just go to the indicator lights on the handle bars? Any help is appreciated

 

I'm trying to figure out where the individual wires go to. I know the alternator wires go to the battery and the regulator. The other one I've traced to the indicator lights and I think a relay maybe?