I rode from the Gold Coast to Sydney (bit over 900 km's, 560 odd miles) in 8 and a half hours on a 250 sportsbike that redlined at 16,500 RPM and I held it just below the whole way in 30 degree heat in black leathers!
Only stopped for fuel and a drink to rehydrate.
Get hard you lot!
Actually, I did that trip 4 times ...