Recent content by SloBoi

Awesome, thank you both! And good catch, I'll take a closer look and maybe order a new rocker arm / lash too. Really appreciate the help

So I'm going to replace the adjuster screw since the one I have is damaged, maybe just replace all of them since they look different than the OEM parts. And I'll make sure nothing else is rolling around in there. Any reason I need to replace the cylinder head which got damaged on the inside...

Upon closer inspection, it seems line that #8 which I thought was a second nut is actually a "cotter valve." https://www.partzilla.com/product/yamaha/1J7-12118-00-00?ref=8f0d1667515b62489cfbd971b3c69160fdefe43c

Bingo! It was a valve lash adjuster. However! The plot thickens! I checked my valve lashes and there was, sure enough, one missing. But I didn't manually remove it - it had somehow actually loosed itself out and then fallen out completely while running. I think. And I also noticed that this one...

Okay so unfortunately that wasn't it. I found that part in my bike and they didn't match. The one that was already installed matches what Partzilla has for that part as well. https://www.partzilla.com/product/yamaha/90113-08021-00?ref=c88448deea51cbbea3c0cc30c2f3cee8521df936 Thanks though...

Awesome, I bet that's it! I'll check and see if that fits when I get home. Thanks a lot!

Hey everyone! I'm a newbie, both to this forum and to working on engines. And to riding lol. I'd really appreciate any input on this. I made a mistake - I was taking apart the engine on my 1978 XS400 and as I was splitting the crank case, I found this little piece had fallen onto my workbench...