I can't seem to find it now but there was a simple procedure for determining correct tire pressure for any specific bike. It involved setting tire pressure when cold, riding a small number of miles to get the tires hot, then measuring tire pressure to determine pressure rise when the tires were hot. This info is used to determine optimal tire pressure for any tire fitted to any particular bike.
Does anyone find this familiar? I thought I read it here on SOHC4.
Alan, it was in Hondamans thoughts, post no 32 in this thread:
http://forums.sohc4.net/index.php?topic=7401.25It says:
"A trick to remember from Continental Tire's motorcycle tire engineer: measure your tire pressure cold, then ride for at least 10 miles until the tire is well warmed, then measure the pressure again. If it rises 2 PSI: you're spot on your required pressure. If it rises more than 2 PSI, your PSI is too low. If it does not rise 2 PSI, your PSI is too high, and your tire patch size will be reduced. When riding 2-up or heavily loaded, add 2 PSI to your "normal" PSI as a start, but check again when warmed up.
As a reference: I run my (CB750) TT100 (4.10x19 front, 4.75x18 rear) tires at 34 PSI single-rider. I run my Avon touring tires (120/90 rear, 110/90 front) at 30 PSI.
Update for Avons after 2008: the Avon tires now use 35 PSI as their minimum, and I am running my new ones at 38 PSI front, 38-40 PSI rear, to make the corners smoother and ore 'even' feeling."
/Jim