macspeedy
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| posted on 2/11/07 at 05:49 PM |
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zx12r breather covers
i was wondering what the pros and cons of covering the breather system on the top of the engine
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Hellfire
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| posted on 2/11/07 at 06:26 PM |
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The kleen air system to which you refer on the ZX12R, is there to add more air (oxygen in particular) to keep the exhaust gases burning longer as they
travel through the system thereby depleating more of the hydrocarbons for emissions purposes.
The exhaust flow has a negative pressure at certain points in the cyclical flow which "suck open" the reed valve allowing the outside air
into the port. When the pressure in the port goes positive the reed valve closes preventing exhaust from flowing back into the inlet system.
Removing the kleen air system should have no effect whatsoever on the power, although some people who have carried out this modification may tell you
otherwise.  It is simply done to rid the engine of clutter and save some weight in the process.
Phil
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wheezy
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| posted on 2/11/07 at 06:27 PM |
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It is quite a common mod that the bike owners do to blank of the reed valves. Its all part of the clean air system which allows air to mix with the
exhaust gases to reduce the hole in the ozone layer.
I left mine fitted initially but have now removed it and blanked up the covers. It makes the engine a bit quieter at idle as it is not sucking in
air.
It may even release an extra 0.2567 Hp
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wheezy
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| posted on 2/11/07 at 06:29 PM |
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Hellfire has beaten me to it
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Hellfire
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| posted on 2/11/07 at 06:32 PM |
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You need a pair of these.
Phil
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athoirs
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| posted on 2/11/07 at 07:03 PM |
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Yip, removed and covered with no problems (but not as bling as Hellfires!)
Andy
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macspeedy
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| posted on 2/11/07 at 07:05 PM |
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Thanks for the lowdown guys much appreciated
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athoirs
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| posted on 2/11/07 at 07:13 PM |
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Just a couple of other things while I remember. - put in updated clutch springs (Barnett) and check the 3 pin alternator output connector for signs
of overheating. There has been a history of oil creep up the cables into the socket where it ends up shorting the phases causing the stator to burn
out. I replaced mine with soldered connectors. If yours is a B1-on it should be ok but worth checking . Did you get all the sensors?
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macspeedy
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| posted on 2/11/07 at 07:40 PM |
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Thanks Andy, got all the bits, well fuel pump is on its way, will check that yeah its a B1
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Hellfire
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| posted on 2/11/07 at 10:30 PM |
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If its a 2004 engine it's a B3. 
Phil
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