SupsChad
XS400 Enthusiast
1982 xs400s Heritage
Alright so I made a thread about this a couple weeks ago and asked for some suggestions on what the noise could be. I finally got the top end fully taken apart as I have been busy since then. This is the video of the noise for reference. So while the pistons have been off, I pulled on both piston connecting rods and there is no up and down play that I can feel. There is slight side to side play but within spec. The top of the pistons after I got rid of the carbon build up appeared to be fine, as in I don't believe they were hitting the valves or top of the case. The only thing of note is that at the bottom of the right connecting rod, there is a slight blue color. I cant tell if this is concerning or not. The other thing is that I took the pistons off and looked at the piston pins and again, the right piston pin has blue coloring on it. Neither of them have any grooving I could feel with my nail but should I replace them? When the pistons where on they didn't have any up/down play but a little side to side. The only other possibility I can think of is that the rocker arms are loose but how do I check? Cant find anything in the manual.
I already plan on buying a new ring set as I broke one while taking them off.
Alright so I made a thread about this a couple weeks ago and asked for some suggestions on what the noise could be. I finally got the top end fully taken apart as I have been busy since then. This is the video of the noise for reference. So while the pistons have been off, I pulled on both piston connecting rods and there is no up and down play that I can feel. There is slight side to side play but within spec. The top of the pistons after I got rid of the carbon build up appeared to be fine, as in I don't believe they were hitting the valves or top of the case. The only thing of note is that at the bottom of the right connecting rod, there is a slight blue color. I cant tell if this is concerning or not. The other thing is that I took the pistons off and looked at the piston pins and again, the right piston pin has blue coloring on it. Neither of them have any grooving I could feel with my nail but should I replace them? When the pistons where on they didn't have any up/down play but a little side to side. The only other possibility I can think of is that the rocker arms are loose but how do I check? Cant find anything in the manual.
I already plan on buying a new ring set as I broke one while taking them off.