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Hi, I have a mostly original 1981 XS400 for sale (only air filter side covers are not original to my knowledge). Stock airbox (with two new OEM filters), professionally repainted tank, carbs cleaned and gas tank drained before storage. Some surface rust, and non-serviceable exhaust baffles have...

Hey everyone. I'm browsing for new tires for my 1981 XS400. The PO put on the Kenda challenger in the rear (which is pretty much terrible in all weather conditions) and an unmatched cruiser looking front tire. I would love to install a matching set, but apparently they don't exist (18"...

Finally pulled out my carbs to clean and rejet. The bike died on me a few times and was running terribly in the hot/humid Maryland weather. I got everything apart without much aggravation, PO had removed brass plugs on the idle screws so that was a breeze to adjust. I ran some seafoam through...

Hello All, I have been riding my bike as much as possible, but noticed that what I believe is the vaccum line coming out of the right carb on my 1981 xs400 is disconnected. See attached picture, is this a problem? The bike is running fine, starting fine (especially now that it's warmer...

Hey everyone, I searched but couldn't find an answer to my question specifically, I'm hoping someone can help me out. I've got an 81 xs400 with the mag wheels. I've seen several people say they're running shinko 244's. The front tire (3.0-18) I can find fine. However, the recommended rear...

Hey everyone, This forum has been extremely helpful to me and people have been very patient with me listing the stuff I'm trying to fix on my bike. I searched through the forums and found the jet sizes I need to order to make up for the open pipes causing my bike to run lean, so I went on...

Hello all, I thought I would start a new thread with some questions, thanks for you suggestions on the exhaust. I finally got over to my friends place to take a good look at the bike. I found more issues than I was expecting….it's a bit long, so thanks in advance. First, this thing was a mess...

Hey everyone, New to the forum and motorcycles in general. Picked up an '81 XS400 Special on Craigslist for $800 this weekend. Everything seems in decent enough shape, the chrome looks good, new tires, paint recently done by a pro, recovered seat, etc. 23K miles, only really noticeable issue...