World of motorcycleS
S1 Publishing(Oxford)© 1999-07
High Lift Camshafts
|What is a high lift cam
|| A high lift cam has a higher cam lobe, which pushes the valve
open a little earlier, and close later, and/or pushes the valve a little
Profile of a standard cam lobe
(lobe in red)
A fatter lobe gives you a valve that opens faster,
and closes later
A fatter and ligher lobe gives you a little more
boost, but these need race spring kits.
|What do high lift cams do?
|| As they open earlier, and close later, they allow a little more
air/fuel mixture into the combustion chamber. This gives you a blittle
more (or a lot) acceleration. It also helps a little with exhaust
|Is there anything I need do to
if I buy one?
||You might have to replace the springs with some
high lift cam, race valve kits are available for same machines
|Anything I should know
||Yes, running your engine faster can make your engine wear out faster,
so don't expect it to run for as many miles/Km's.
I know that there are some different high lift camshafts, some
will give you faster mid to high range power
You might need to re jet the carb(s) sorry, I can't help you
much on that, a dyno jet will let you know for sure.
This is just a general
If you are about to do your
own maintenance, using these pages, I take no responsibility if you get
things wrong, fall off or blow up your engine!
& yes I can find you
hi lift cams for some models but not as many as I'd like. some cams
be re profiled to spec. too
If you need info, let me
know E mail me
Modified for 2009