with a perfect engine we would have fully variable intake trumpet length, cylinder compression, intake valve timing, exhaust valve timing and exhaust length. An engine is a mechanical pump really and as we can't adjust many of those attributes the engineers have to optimise for a specific operating characteristic. What we can do is alter some of those parameters though , like honda with opening a second set of intake vales (vtech) , benelli with the intake trumpet change (lifts the 'cone' of the top) and putting valves in the exhaust to alter the back pressure. I do look forward to the day when we have pneumatic valves, forced induction (turbos will return!) and variable exhaust capability to give us a motor able to operate at it's most efficient capability over a wide rev range. Right now bikes are built as leisure devices and the requirements for fuel economy are secondary to power and basic marketing requirements. In 20 years i think we'll be riding smaller (400cc?) engines yet generating more power and we'll go fully automatic, we'll have a gear shifter and clutch - just they won't physically do anything as the computer will control the gear control as i think we might have more gears to allow the engine to remain in a specific rev range for efficiency requirements.Quote from: MightyClown on 28 April 2013, 07:23:48 amRight now bikes are built as leisure devices and the requirements for fuel economy are secondary to power and basic marketing requirements. In 20 years i think we'll be riding smaller (400cc?) engines yet generating more power and we'll go fully automatic, we'll have a gear shifter and clutch - just they won't physically do anything as the computer will control the gear control as i think we might have more gears to allow the engine to remain in a specific rev range for efficiency requirements. Brilliant I'll be in my 90's then much lighter bikes less physical movement to be able ride but to still able to bend the hands on the rev counter/ speedo, magic. Hopefully exup will be long gone by then so that i dont have bend over to remove it..........
Right now bikes are built as leisure devices and the requirements for fuel economy are secondary to power and basic marketing requirements. In 20 years i think we'll be riding smaller (400cc?) engines yet generating more power and we'll go fully automatic, we'll have a gear shifter and clutch - just they won't physically do anything as the computer will control the gear control as i think we might have more gears to allow the engine to remain in a specific rev range for efficiency requirements.
Hmmm , I wonder if he will return to you in a months time for the Quick 8 minute exup valve service now that its functioning OK ? Sounds to me as there is probably a lot of Gen 1s out there bogging around out there with seized or semi seized valves ........ and if thats the case all the moving parts are well worn by now and all the Copper grease in the world aint going to replace that worn metal. Bin the Bitch.