£320 Alan, but I didn't bother with the dyno. With a before and after dyno its £360. Its the first bike I've taken there but he did say its £60 cheaper for repeat customers. I'm just blown away with the difference its made, I can even use 6th gear now
I had a similar problem and was told to put it to 150bhp low and problem solved. Hilltop are going thru a few problems With GSer owners at the moment