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I figured I put this question in it's own thread... 1981 XS400 H. Carbs synced after engine warm-up. New air filters. Carb cleaned, new butterfly shaft seals and washers, new diaphragms. Floats at 26mm. All stock jetting and exhaust. My mixture screws are now at only one turn out. Bike starts...

Slowly going through our 1981 (XS400H) project; we're coming into electrical things now, which I actually enjoy. Bike is in stock form as far as the electrics go. For now; we are going to simplify a few things and replace the aging/crumbling relays and connectors. We've tested everything and all...

Bike is the 1981 XS400 Special II that I'm rebuilding with my daughter. PO did make some changes to the harness, such as switching out the fuse box to inline blade-type fuses. So it stands to reason there may be other modifications. Everything seems present though. We re-installed the harness...

We've been slowly bringing a 1981 XS400 back to life . Working on the forks, a quick inspection revealed the original circlip/rings that hold the spring seats in place were getting a bit worse for wear. I was surprised at how little material was holding the springs seats in place, but physics...

Glad to be here at the XS400 forum. Thought I'd share how I ended up here... Five years ago I was at my friend Mark’s house, he’s a moto guy and had a few bikes in his garage; he had this old Yamaha motorcycle that he needed to sell. It was old and ratty and the price was right. It kicked over...

Morning all. Just brought a 1981 XS400H home (the "Special II"). It's in boxes but ready to be assembled; looking forward to getting it running well. I'll create a separate post for the build. One thing I can't find: I am wanting to go back to original exhaust; right now it has a 2-1 on it...