Hi I recently brought a new BF xr6T, mercury silver, 18 inch mags clocked up 200k's on the day I got it an an average fuel usage of 21 litres per 100...I am assuming this will drop once I drive a bit more 'sedately'! No problems detected yet (which was surprising given most posts I had read of this forum highlighed the multiple minor problems new cars had) Got a few questions (I apologise in advance for their newbie nature) 1. what is the optimal rpm, power wise, ie when should I be changing from 1st to 2nd, 2nd to 3rd etc.... 2. probably going to leave it unmodded at this stage, but was considering adding a K&N or BMC airfilter, would this be worthwhile? 3. How do you remove the centre muffler? 4. Tire pressure - dealer recommended 34 psi front and rear which seemed low for 18 inches, what do you guys use? Thanks in advance....