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Installed a toggle switch under the tank in order to eliminate the key switch. Pretty happy with how this turned out. I had to gut the ignition switch when I first got the bike because it came with no keys. No more pulling keys, knives or screwdrivers out of my pocket to turn off the bike!

Burrito run!

I set the valves and then started over with carbs and syncing. There was a lot of slop in the valves. Carb adjustments went much better. Sprayed down carbs looking for air leak. Didn’t find anything but not going to be surprised if I find a leak eventually. So far no fast idle and bike is...

Dipped in simple green so didn't worry much about plastic/rubber. Is there an easy test to verify if they are leaking air?

Following your advice. Set the valves this afternoon. Definitely too much play. Will re-sync. I did not replace any seals in the carbs. By shaft seals do you mean for the air inlet valve? I did not disassemble the butterflies. Diaphragms looked great. Drained all the oil and cleaned the...

You make a good point. Now that you mention it, that does seem pretty obvious. Will rebalance and update.

Background Me: I'm new to carbs. I'm new to motorcycles. I'm not afraid to fix it. The bike: 81 xs 400 barn find. 6600 miles on the odometer. Completely stock. Did nothing to the engine except a couple of oil changes and fresh gas. (side note: I ditched the vacuum petcock in favor of a...

Looks much better. I like the bars and the new rear lights. Planning something similar with mine. Ditto on the tire question. I desperately need new rubber and also want more of a dual sport tire.

I brought home my xs400 in April, put fresh gas with stabilizer in it and started her up for the first time in 30ish years. Bike seemed to run great but I didn't have much time to mess with it. Since then I've started the bike 1 or 2 times a week and let it run for 10 minutes or so. I...

If your not concerned about keeping it original, it’s not to hard to make a plate to adapt to a 1/8 npt thread. Then you can use whatever cut off you like...

What type and size of tires are you running? I like the look of those.

I got rid of that old leaky petcock. Machined an NPT adaptor plate and installed a new petcock and filter. Much better!

Got that too! I slightly overfilled with oil. Haven't run it since due to a leaky fuel petcock. Made an NPT adaptor plate and installed a new petcock yesterday. Hopefully will run it again today. I'm assuming it will take over 2000cc of oil since it has a new filter. I hope the oil level...

It's alive! After repairing a leak at the tank petcock and installing a new battery, I decided to see if she'd start. 3rd kick and she was running! Let it warm up and then changed the oil and filter. Yahoo!

Thanks for all the input! Today I was able to get the gas tank lid open. The inside of the tank is clean and dry! Got the guts out of the ignition switch so I can start using it. Drained the oil. Put in fresh oil (sight glass is clear!). Pulled the plugs and put some marvel in the...

My experience includes machining, welding, fabricating, farm wrenching and other relevant man skills. I'm pretty mechanically inclined but I have no experience with motorcycles. While most motorcycle nuts seem to have been infected from early on in life I'm coming into this a bit late at 46...