www.zxrworld.co.uk

a place simon lowes frequently mentions who i believe used to tune his ZXR400 racebike.

http://www.hodsonengineering.co.uk/

Couldnt find a nicer guy to tune my engines to this day i have never blown a engine using Hodson Engineering
all round great price / brillant work / well priced /

Lawerence now tunes a few engines running within the Bemsee club with some good results

Good luck all

There are many tuners out there so look around but talk to them all and ask for peoples advice too

Cheers Baz