Join Date: Mar 2005
Location: Tasmania, Australia
I run 40psi front and 42psi rear, whether solo or two-up. 4000km and no real wear showing on either tyre. There's no science that I'm aware of, but general rule of thumb for me is to go 4-6psi higher than the maker recommends (I do this on my cars too.) The reason for going a little more than that with the front is due to advice taken from this site regarding premature tyre wear if run lower than 38psi. As air is free anyway, just have a bit of an experimient and see what feels best for you!
DL650 K5, Staintune pipe, topbox, Powerbronze bellypan, Givi E21's, Suzuki handguards