"...even if I managed to get the right sized headset...": what like this?
"...I would need a special machine to assemble it...": what like this? And WTF does "properly seal it" mean?
OK, I've made some assumptions (1" threaded fork/ISO thread, which it's likely you would have with a 531 frame), but even if you're using threadless forks or have Italian or JIS threading it's all standardized stuff.
Have a look at this cribsheet (scroll down for headsets).
"...even if I managed to get the right sized headset...": what like this?
"...I would need a special machine to assemble it...": what like this? And WTF does "properly seal it" mean?
OK, I've made some assumptions (1" threaded fork/ISO thread, which it's likely you would have with a 531 frame), but even if you're using threadless forks or have Italian or JIS threading it's all standardized stuff.
Have a look at this cribsheet (scroll down for headsets).
Let us know what frame and forks you're using.