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So I noticed the petcock on my '83 XS400 DOHC started leaking from the breather hole in the spacer last week. The leak only occurs when the bike is running and gas does not appear to leak through the fuel line while the bike is off. This leads me to believe that the diaphragm in the petcock is...

Hey guys, I was wondering if anyone knew the dimensions of the bleed screw for a 1983 XS400K DOHC. Im trying to order a speed bleeder for the bike, but have no idea which size I should purchase. Thanks!

Thanks for you and a wolves responses. Believe me I was in absolute disbelief. I thought I must have been seeing things when I looked up between the countershaft cover and the motor and did not see the sprocket, and just the bare counter shaft. I think the PO must have either not tightened...

I just recently purchased a 1983 XS400 DOHC and it seemed to run and ride just fine. However, today as I was riding I had my front sprocket come off completely (I'm just as baffled as you all). Luckily I was able to keep the bike upright and pull over. I have no idea how this happened, I just...