Quote Originally Posted by Phil Russell View Post
Once again, excellent info for the 'very useful to know file'.
I had begun to search for TP info and found reference to the TX200 MK3 having a port of around 3.7 - 3.8 with the MK1 and 2 having the narrower port of 3.2.


Cheers, Phil
I measured mine using drill bits- 3.6 fitted, 3.7 just didn't, so it could well really be 3.7.
It is a Mk.3 tube running a Mk 2 piston - would it be worth looking for a Mk 2 tube?