Well Sam, Are you using stock fork legs? Mine is a K3 and it seems to me I just used another K arm. I probably have a dozen and they're all the same.
Thanks guys, looks like BW has sorted it

.
The problem arose when we bought the doner bike.
It was a K4 but it had a DOHC CB900 front end on it.
Chris started looking round for the K4 front end bits and came up with a set of F1 forks and a caliper arm that was said to be off a K4.
When you are not sure what you are doing, people take advantage and tell/sell you anything.
In the end I found an arm that did the job with a bit of moding, but like the first arm, I hadn't a clue what it came off.
Anyway sorted now thanks.

Sam.
