Originally Posted by
Jesse Open
I believe that upgraded fat fin 125 may have been due to anticipation of the FG version.(?)
So it would seem. Interesting though that the 125A and FG20 don't carry the same cylinder part number. Something is different, I have no idea what it might be, have never had an FG20 in hand.
The FG21 carries a different cylinder part number than the 125A and FG20 but it has at least two notable differences, larger bore and bronze valve seats.
Of the gas to methanol conversions you've done, have they all been FG20's?