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  • Jughead
    Jughead replied to the thread A day in the workshop ....
    I normally set them to the middle of the spec or slightly looser, never tighter.
  • Jughead
    Jughead replied to the thread A day in the workshop ....
    Yup. Swingarm pivot went threadbound, despite plenty of heat.
  • Jughead
    Jughead replied to the thread A day in the workshop ....
    AAARRRRGGHHHHHH!!! :mad:
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    • 1000098956.jpg
  • Jughead
    Jughead replied to the thread A day in the workshop ....
    Valve seats are a press/friction fit in the head. They are normally frozen and then pressed into place...
  • Jughead
    Jughead replied to the thread A day in the workshop ....
    Correct. That went a little further though and damaged the barrels as well.
  • Jughead
    Jughead reacted to EssBee's post in the thread A day in the workshop ... with Like Like.
    That's interesting. Thanks for all the explanations etc.
  • Jughead
    Jughead replied to the thread A day in the workshop ....
    I suspect both bikes had been drowned. Both valves affected were lower RHS exhaust. That is the cylinder that draws water through deep...
  • Jughead
    Jughead replied to the thread A day in the workshop ....
    Had that happen to two different bikes, literally a few weeks apart. This one was off a bike with 83k on the clock, the other one was 129k
  • Jughead
    Jughead replied to the thread A day in the workshop ....
    Here's a pic of an R1200GSA head where the valve seat has come loose. It can clearly be seen on the top right valve.
    • 20240906_112304.jpg
  • Jughead
    Jughead replied to the thread A day in the workshop ....
    No, valve stem would remain the same length. The entire valve would move down due to the original spec valve thickness, albeit not as...
  • Jughead
    Jughead replied to the thread A day in the workshop ....
    Possibly, but would need inspection. One can normally get away with just new valves and replacing the valve seat in the head. With...
  • Jughead
    Jughead replied to the thread A day in the workshop ....
    I get a call last night from a kid (well, he's probably 20) He has a Honda 125 Bros that won't start. He explains in great detail how...
  • Jughead
    Jughead replied to the thread A day in the workshop ....
    Well, I tried to quote it away, so have more than covered my costs for parts and labour. You know how "quoting it away" works. You...
  • Jughead
    Jughead replied to the thread A day in the workshop ....
    To be very honest, I did not expect that! The valves are truly embedded in the head, so much so that I had to skim the thinnest shim...
  • Jughead
    Jughead replied to the thread A day in the workshop ....
    The moment of truth has arrived. Will it fire up? :D:p:cool:
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