Obsession_for_RM
Member
- Mar 28, 2006
- 6
- 0
A Question about cylinder discoloration
Hi, I am new to the Dirt Bike life (as it has taken over mine.) I love this site.
I was wondering, I bought a Jug / Cylinder for my RM on the internet.
This cylinder was in the stock bore 54mm . I took it to my local engine rebuilders as the cylinder was rusted bad....It looked really bad.
The engine rebuilders called about a week later and said they honed it to 54.5mm. They went on to say that it was badly pitted below the ports and this SHOULD be ok.(not very reassuring). I had to take a closer look I inspected the bore and it was not pitted.( not visually or to the touch) just a bunch of dark little spots maybe a 1\2cm-1cm in diameter . all located as they said below the ports where the rust was a little thicker. What does this mean? Has the structural integrity of the cylinder been compromised?
Thanks for all the great info already.
Hi, I am new to the Dirt Bike life (as it has taken over mine.) I love this site.
I was wondering, I bought a Jug / Cylinder for my RM on the internet.
This cylinder was in the stock bore 54mm . I took it to my local engine rebuilders as the cylinder was rusted bad....It looked really bad.
The engine rebuilders called about a week later and said they honed it to 54.5mm. They went on to say that it was badly pitted below the ports and this SHOULD be ok.(not very reassuring). I had to take a closer look I inspected the bore and it was not pitted.( not visually or to the touch) just a bunch of dark little spots maybe a 1\2cm-1cm in diameter . all located as they said below the ports where the rust was a little thicker. What does this mean? Has the structural integrity of the cylinder been compromised?
Thanks for all the great info already.
Last edited: