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Fazer 1000/FZ1 corner / Re: how old is old.
« on: 30 May 2013, 04:56:24 pm »
I'm 62 and no Doctor has interferred with my Freckle yet, when will it happen ?
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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.
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.
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..........
my exup valve had been broken for a few years. One of the bolts for the cover had snapped and i couldn't drill it out. So with two bolts holding on the cover / housing it didn't go on flush so pinched the valve off centre and jammed it.
Anyway, end result was the valve wouldn't rotate so i just removed it. I took the exhaust off to paint the engine and tidy up the bike as i've done 30,000 miles now. With the bolt removed and a helicoil fitted at a local engineering shop i could refit the valve.
The result - OMFG [size=78%]- [/size]i could not believe the effect, it was like a new engine was fitted. I thought there would be a minor improvement and had forgotten what the bike was like with the exup working.
I'd always keep a *working* valve - also i've been Ivanised (by the Mike incidentally)
[ although i will be posting a question about valve operation as it doesn't seem to be resetting to the fully closed position - but the performance is night and day ]
You certainly know what you're talking about with that last comment.
Are you showing it off at the Bike Shed meeting this Sunday then?