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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

I do have access to people with welders, what is the prep process and the procedure?

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...

Looks like ill try and return the caps I got from mikes, do those NGK Iridium Spark Plug BPR-7EIX have a screw off top? I ran into the problem of them not fitting into the caps? Or will they fit into the ngk caps?

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

Ok guys so update to this thread, just broke the carbs apart and cleaned them again, and I have reversed my problem....... now the left side is cold and right is hot and it will only run on when I have the choke pulled out and dies when I let off the choke (also I have the plunger style choke...

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

Sorry here is the photo, can;t beat 7.99 from Ebay, hopefully they'll hold up for a little bit! Thanks for all the help guys!

Ok I filed down the nubs on the throttle and was able to squeeze them on, check out the photo sorry when upload them via iPhone they flip :( Thanks for the help but one other question: what controls the springyness or how fast the throttle snaps back? Mine seems laggy and I was wondering if...

Thanks guys for the tips, going to try it out tonight and report back with what happened

Nope I tried the wider one on it and it's a no go, I'll look at it again tomorrow and see about it

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...

Thanks for the info guys! Scorpio the more Michiganders the better!

These are mine

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?

Thanks for the input, I pulled off the carbs today and reset them a small needle (per some YouTube video I saw) I got them set, I also compression tested it and left side 135, right 145, puts everything back on the bike figuring that I would be able to get it running with having just bench sync...

What exactly are the butterfly seals?