Billet water pump, who's interested?

The cover yes, but the impeller only if it did lower temps. I've heard of people putting a restrictor in the line to limit flow through the system and apparently works.

The 2010 models (TXC and TE) have a:

"New high performance water pump for improved cooling system efficiency (TE models)"

I doubt they changed the cylinder head casting or the drive stub, so the new impeller or impeller & housing might be something to look at when finalizing your design.

MAT

Just a thought but if you do make the cover how about making some tabs to come off it to extend out over the hoses to offer them a bit of protection. I've had a couple of mates had rocks pierce there hoses when they've come off, both on a older 610 and a 07 450.