[210riderzx]

I'm trying to kleen air mod a 99 zx600e. It's a Cali model with EVAP system. I just don't know what you would do with the evap hose. Can you delete it? I've searched but no couldn't find anyone saying they did it with success

 

[92Ninjas]

I'm trying to kleen air mod a 99 zx600e. It's a Cali model with EVAP system. I just don't know what you would do with the evap hose. Can you delete it? I've searched but no couldn't find anyone saying they did it with success View attachment 23583

You can. Block off the reed valves on the valve cover. Route the carb vacuum line to the air box. Route crankcase vent to atmosphere iirc.

 

[Chevy Fan Attic]

Whats going to happen to the oil vapor and pressure that collects under
the vavle cover?

 

[92Ninjas]

Whats going to happen to the oil vapor and pressure that collects under
the vavle cover?

This is an excellent question. One I don't have the answer to. Maybe someone more knowledgeable can chime in?

 

[Pyke13]

Any excess pressure will fond its way out the crankcase breather. If it did any harm there would be loads of posts about saying kleen air mod blew up my engine

 

[Chevy Fan Attic]

Any excess pressure will fond its way out the crankcase breather. If it did any harm there would be loads of posts about saying kleen air mod blew up my engine

Why do you want to do this? I think your going to have all kinds of oil pulsing out of the breather.
Back in the day I took my 98 ZX 11 to Curt Jordon for some dyno tuning after I installed the jet kit and timing advancer. He mentioned that he routed the breather tubs from the air box to the exhaust system side. He showed me the dyno pull after he did that change. It was good for almost 3 horsepower and no oil blowing out of a breather. That was 20 + years ago and cant remember how he did it.

 

[Pyke13]

On the J model engine the rocker cover doesnt have the holes in it for the clean air stuff. So i would assume that kawasaki dont think its an issue not having a vent there.
On the ram air bikes its done to balance pressure on the fuel system with the pressure in the air box

 

[Chevy Fan Attic]

On the J model engine the rocker cover doesnt have the holes in it for the clean air stuff. So i would assume that kawasaki dont think its an issue not having a vent there.
On the ram air bikes its done to balance pressure on the fuel system with the pressure in the air box

Right, I know if you start messing with the intake on those ram air bikes they wont run right. Thats another reason I was thinking why do you want to remove all that stuff.
So, why do you want to remove it?

 

[quisp]

Whats going to happen to the oil vapor and pressure that collects under
the vavle cover?

Its not venting the valve cover ,its supplying air to the exhaust ports.

 

[Chevy Fan Attic]

Its not venting the valve cover ,its supplying air to the exhaust ports.

Are the hoses the OP is pointing out not connected to the valve cover? Am I missing something? Why do people do this mod, HP gains?

 

[ninjanut]

There are no HP gains with this mod. Mainly done to clean up the top of the motor and to make maintenance easier as well.