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Hey guys I stripped the Mixture screw on my '80 XS400 carburetor and just got the new carb body in today from a XS400 Maxim and when I went to put them together I noticed the fuel line coupler connectors where different, one was a male end and the other was a large female. Any Ideas on how I...

Hey Guys So I made a bone head mistake and took out one of the screws on the bottom of my engine thinking it was the rain plug.... I know rookie mistake. Engine doesn't want to idle correctly and then die, any idea what these screw do? And anyway to fix what I did ? Check the photos out...

Guys wanted to share a pic of a new seat cover I got off eBay for $30, fits perfect and looks great! The guy made made it custom for me. Look him up on eBay for seat covers for your XS! The guys name is mac32756 See pictures Posted via Mobile

Hey guys first off good news: finally got my bike running I. Tip top shape, charging system is charging, fixed the choke with a bearing from a grease fitting and it starts on first kick or click of starter. All that being said, I have a really bad crack my muffler, are there any cheap short...

Hey guys need your opinion on whether or not this spark looks to weak? see video Also I replaced the spark plug wire with 7mm copper core wire and kept the same caps, don't know if I have the 5ohm caps or not? I order new ones 5ohm from Mikes because I read on the forum that if you have a...

Hey guys I was hoping someone could post a pic of what there butterfly valves look like at idle? I know weird question, can't get my bike to start with it set like this, so I wanted to know how far off I am? Because if needs to be more open I've run out of thread on the idle screw. Thanks

Hey guys so my right cylinder is not heating up so I wanted to check my points to make sure everything is timed right. After doing some research I found out that my bike has a solid state ignition system, does those ever need adjusting? or are they set forever? Thanks

Hey guys I have the stock handle bars on my 1980 XS400 and I'm trying to find the correct handle bar grips that go over it, I ordered 7/8 size handlebars from eBay and they just came in and the throttle grip won't go over the throttle housing (I believe thats what it's called) the white plastic...

Does anyone know what stock mirrors came on the 1980 XS400, on my bike I have chrome ones that have the Yamaha emblem on them. Also why is the left side higher then the right? Any thoughts?

Hey guys I just got my 1980 XS 400 running, but noticed that my left cylinder is running hotter than my right, I checked with a laser thermo (left running 300+, right running around 120). I pulled the plugs and checked the spark and there both getting good spark, I noticed the right plug is...

Hey guys, I'm having some trouble with my charging system on my '80 xs400, at idle I'm getting 11.36v as I rev it up it will slowly increase in voltage to battery. Is that normal to be such a low voltage at idle? I thought it was supposed to be somewhere in 14v? Some one set me straight...

Hey guys will a xs650 headlight bucket fit on a xs400? Or is it to big? I just installed one my xs400 and it looks a little big and the signals are drooping a little bit. Check the picture out any feedback or ways to fix it would be helpful!

Hey guys I finah got my 400 up and running! But I don't have any brake presure when I pull the front brake. I can still roll the bike foward with me grabbing the brake. The prevous owner had taped the front tube coming out of the fluid holder, and there is still fluid in there. Any ideas...

Hey guys, so I bought a bike with a Vetter fairing on it, I took it off and thus lost my headlights and turn signals. What parts do I need to mount a new headlight and turn signals? Could anyone post a close up view of there front forks so I can see how everything is attached? My minds boggled...

Hey guys second post on XS400.com and I must say you guys are a helpful bunch of people, Anyways Im hoping you can help me out again, I just reinstalled my carbs after cleaning them and tried to start my bike, its start but on run on choke, and dies when you add throttle. I think it could be...

Hey guys! I'm new to the forum and to motorcycles in general. I was able to pick up a xs400 Special for a steal of a deal (300$), anyways I'm in the process of cleaning carbs and getting her in running condition. I've come across something odd though with the fuse panel under the seat, it looks...