19mm vs 22mm cylinder brake cylinder

[sparkz786]

Okay, so on my GT i have 256mm brakes (and i always assumed the person who done them fitted a 22mm brake cylinder) and the G i am building has the standard 239mm brakes on it. Im going to swap the brakes over from the two and before i whip off the brake cylinder from the gt is there any clear visual differences in the two sizes??
The g has the black cylinder with just 3 holes, and the one on the gt is like silvery/gold and has 4 with one blanked off? Is this the 22m brake cylinder?

[JoeH]

When I went to 22mm it had 4 outlets.

Original G40 has 3

[vee-dub90]

it usually has the size stamped on it, if not just get a new one

[Jezza-7]

The silvery gold one is a 22mm master cylinder. Same as mine.

[sparkz786]

Thanks for your help guys!!!