People were talking about how the Kleen mod will blow gaskets etc, it turns out its not the case-there is a vacuum of -1 to -5 psi at all times in the modified Kleen bypass hose.
I ran a gauge in a T-fitting and ran the bike hard under every possible cirumstance, watching the guage, when the bike is at idle there is -1psi, at idle wide open throttle its the same.

All through the powerband, decel, or accel, idle to redline it only fluctuates between -1 to -5psi vaccum, so no chance of blowing seals. It never came close to Zero psi.
The bike seems to lug lower, it might be in my head, but the thing has gotta run better because its running on clean air instead of dirty *** PCV gases being pumped into the airbox.

 

Good work buddy.

 

Nice! You took it a step further and actually tested it. Good work!

 

Good ****.. You should re-post this in the sticky.

 

u gotta test the crankcase for pressure.

 

that IS the crankcase pressure its reading. The measurement I took was right off the crankcase breather.

The crankcase never builds positive pressure.

 

i have an 06 636 and i read those other threads on the kleen air mod but i still dont have a good idea what the point of it is. i have never had any trouble with my bike in stock form. so what is the benefit of this mod in plain english.

 

^^ Its to keep oil outta your airbox. I hadn't had any problems w/my 06 either, but I did it anyway.

 

1. It keeps Oil frome over flowing into your airbox and possible hydro lock when your bike is far back like in a coaster or on the bar.

2. It helps your idle be a tad bit torquier or stronger on any bike.

3. It lets your engine breathe clean air only instead of hot oily air from the crankcase. Cooler cleaner air = better all around performance

If your stunting a 6r or 6rr I would deff do it but, Even if you don't stunt your bike it will still be worth doing just for the performance aspect. Every little bit counts to me.

 

well said thorpe

heres the benefits:

about 7 extra hp a guy did a write up on antoher forum, and he did dyno runs, it was well written up and seemed legit.

the general idea is this:

you ever see a PCV hose unhooked? it just spews this nasty hot oily thick vapor-its all the blowby gases that went past the rings and are now floating around in the crankcase.....the more blowby the engine has the faster and thicker and nastier it is. EPA decided in '73 that you can't vent PCV gases into the atmosphere anymore so they routed PCV lines into the airboxes of engines (sometimes just right into the intake manifold) so this nasty **** gets reburned.

So on a stock 636 the airbox is always very full of these blowby gases. what this mod does is bypass the airbox, so the airbox is breathing only clean cool air.

The Kleen valve is a valve inside the cylinder head that dumps PCV gases and fresh air right behind the exhaust valve to help burn unburned gasoline for emissions purposes. (you ever see an air pump on a car? it injects fresh air into the exhaust manifold so partially burned gasoline in the exhaust can keep burning and make for a cleaner vehicle) Through some miracle of physics this Kleen valve generates a useful vacuum and this is what we plug our old PCV lines into, so the PCV gases get sucked out of the crankcase right into the exhaust.

and as an added benefit, no oil can go into the airbox

 

good stuff, ima have to do this when im not feeling so lazy. i never had a problem with oil in my airbox cuz i dont do bar tricks but still sounds like a useful mod.

 

pcpweelo i believe has done this same mod on his 04 gixxer 600. ive never had any oil issues in my own 600, and it doesnt seem to be an issue in general with these bikes. but do you think itd still be a safe mod knowing what you know now about the 636? im sure totally different physics on the engine, but if you had to make an educated guess..?

 

Yesterday I drop down a wheeelie and white smoke comes blowin out of my pipe like crazzzzy, thought It was the head gasket however i checked the airbox first thing. Sure enufffff it was oil in the airbox, extend that airbox drain hose out the bottom of your 636 so this problem never happens!

 

whats PCV stand for

is it Positive Crankcase Ventilation?

were you taking a readying without the valve cover **** hooked to the gauge set, like, only take a reading directly from the crank case? and you seriously gotta test this underload... not just idle and reving... these ports are not very large to the exhaust valves..

 

i almost killed myself riding around with a vacuum guage in my hand, i hit it at wide open throttle through the whole powerband, wide open at 13k rpm made about -5 psi vacuum. btw are you a machinist or something, i was reading your stuff in the sticky thread, it blew my mind.


the only real question is how quickly the kleen can digest a massive dose of oil. I dont see how superheated engine oil would have any ability to clog a port.


good question man, Ive read online about people doing the mod-theres a link of a guy that did it on a gsxr on the sticky 636 thread.
id hook up a T fitting with a pressure guage, ( I used a vacuum guage that ranges from +5 psi to -30psi) it cost like 8 bucks, to confirm that the system is the same.

 

So this is recomended? Iv always herd about 636's having this problem..
But i havent had a problem with mine sence i got it.
Could you post up how to do this in lameman's term's? LOL
Thanks.

 

Yo I did the Kleen mod over a year ago and it works good BUT, on a rare occasion like the other night, I started blowing white smoke everywhere and it would'nt stop. I shut the bike off, let it sit, started it back up, and white smoke everywhere. It was a nuisance-I think I must have bypassed a quart of oil into my exhaust (cuz thats where the Kleen system discharges) or something but i dunno. It had me really worried for a second then it finally went away. WTF?

 

is that sarcasum?

 

ya i still have to do mine

 

i have a 2003 gsxr 600 im having the same problem with the oil getting into my airbox. it only does it when i ride 3rd gear stand up wheelies for about a mile. could anyone help me with this problem?