xs400 1978

Hey guys, finally I got my shiny new parts for my carbs I'm curious as to how high to set the float heights, in the last image the black line on the paper is 26mm without the gasket. I saw in this video that I need to tilt the carbs till the floats are sitting in the needle then measure...

Hey guys, today i wanted to rip on my bike and I had it running with the choke fully open and slowly closed it as I let the bike warm up. Concern #1 - the bike shutoff when I fully pushed the choke in, this does happen often but riding it for a bit solves this issue concern #2 - as I was taking...

Hello all I recently began my journey into a a 78'/82' Yamastein! I have ran into a situation where I need some clarity. This is my first motorcycle project that I have basically had to start from scratch so my knowledge on these things is maybe not up to par. From what I can tell from the...

Hi All, I posted awhile back about my XS400 that wasn’t running - followed the advice on my last post and actually got the bike to run. The bike is not in the best shape (some idling issues) but I have rode it about 4 times now and it seems to run well. I dropped it off at a shop just to have a...

Hey everyone, new member here. I just recently picked up a 1978 Yamaha XS400(f?) for a steal with a clean title and Haynes manual included, and found your site. After trolling through threads for a couple days I figured I should post my own. I'm pretty mechanically inclined and want to do as...

Hi xs400ers, any ideas on compatible petcocks such as 1978 xs360 that will fit my 1978 xs400 fuel tank. Ebay prices for preloved units are a little too much....anyone had any success with substitutions?? thanks BB