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zx6rfool's Avatar
Posts: 7,826
Join Date: June 9, 2003
Location: Winchester
August 15, 2003, 10:24 AM

just got my "new" motor for my bike. And noticed that the crank case venting system is jimmy riged to its slef. On my old motor the valve cover vents in to the intake and air box (after passing through some black cyclinder) the vent holes on the newer motor are bridged and the vent hose going to the intakes is plugged. I have no clue as to how this affects performance, but have heard of people plugging vacume lines on f4i to get considerable gains (for its simplicity) should i return the system to stock or leave it as it is?

Attack Life! It's going to kill you anyway.

08 Z1000

Go Hokies!
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Triple X's Avatar
Posts: 8,501
Join Date: September 29, 2002
Location: Stephens City, VA
August 15, 2003, 11:56 AM

Can't quite tell from your description how the new motor is set up but you DO want it to vent. How you do it doesn't matter that much. Some use a small K&N filter on the hose to keep the incoming air clean (good idea). Stock it goes to the airbox so the oil fumes get pulled back into the engine. On racebikes you need to rig up a catch-can in case the bike is on it's side to catch the oil.
If you need a hand let me know...

2015 Yamaha R1
2011 Harley Electra Glide Limited
2009 Yamaha Zuma 125
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2003 Honda CRF 150F Mini-monster
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