thanks for all the replies
received email from Avon ( I had asked them re tyre pressures 2 up approx 25 stone of weight)
response :-
Hi Steve,
Yes, I think when running with a pillion you should use 36psi front and 41psi rear.
Best regards,
Peter J McNally
M/C Technical Product Manager
01225 357753
www.avonmotorcycle.com
Cheers Steve