Quote:
Originally Posted by redyaris
The simple way to reduce duration and valve over lap is to increas valve clearance.
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Wich is only really suitable on engines with rocker arms.
I believed the CBR 600 was a DOHC with the cams on top of the valves.
Anyway, cam phasing sounds like it has more potential (angle wise) and is not detrimential to durability wich valve clearance increase can be.
Of course cam phasing needs the cam sprocket to be trimmed wich is not always possible and always more fiddle than enlarge valve clearance on a rocker arm setup.
Quote:
Originally Posted by redyaris
The stock final drive is 15T/44T, the furthest [available] from that is 17T/34T.
At 70 mph the change in final drive will drop the rpm from 5200rpm > 3500rpm.
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That is a nice range of ratio !
I wish I could have such a potential (15/43 to 16/37 tops)