I have read all the posts speculating on removing the oil ressy box.

I just wondered how many people have removed it and had no probs with engine running.

Removing this thing would make jetting quite a bit easier.

I wanna replace it by simply eliminating the box and using the same diameter tubing. All the connections will be the same, but the box will be removed.

Any one done it?

NormalZ did this a while back. I think the general consensus was, dont do it.

search for "black box removal" by normalz, should be able to find it.

mine is off right now. no probs yet

Did you just plug the wholes or do what I am thinking...eliminate box and connect with lines?

Details???

Mine has been off all last year and it has worked flawlessly. I "T'd" all 3 hoses together right where the black box went using a plastic T. I ran the crank case vent hose to one side of the T. I ran the valve cover vent to one side of the T. And ran the last hose all the way to the front by the steering stem with a Uni breather.

mine is pretty much what pinky did. i have pics but not on this computer, and i can't get to them.
I also used clear tubing so I could see exactly what was happening.

I ran a hose from cylinder, up to a T that goes to the valve cover, then the other side of the T goes up to the steering stem with a breather filter. the T fitting is right below the gas tank, and it is positioned exactly like a T over the valve cover

Why cant you just run the T to the intake like it does in stock form? Is the breather a "must have"?

why ?

You could, my ESR is setup that way...

You could run the T into the intake rather than a breather, BUT, they do that for emissions. It puts the vented gases from your crank case back into the motor rather than the atmosphere. Putting those gases back into the motor is not good for performance but you could do it.

why what?

why change it ? its not going to make you faster ,its not going to make the quad lighter .
its not really even in the way ,its just there doing what it does .

yes for me it was in the way. i couldnt get the box in with my manual tensioner, and i cant even imagine trying to adjust it while its in there.

was in my way too.

really ???............ i had no problem at all

do you have a manual tensioner?

yes

well on mine it is the stock one converted to manual, which sticks out farther than the ape/tt one i think.
I tried putting in the tensioner first, then the box. No go
Tried the tensioner body, then the box, then the bolt. No go
Tried the box, then the tensioner. No go
Tried the box, tensioner body, then bolt. No go

Now I said w00ter it, went to the store and paid $6 for materials to make what I have now.

Now I'm sure maybe someway I could've gotten it to work. But why? If what I have now works and is simpler and makes maintenance easy, then who cares

i have a acct with the spring cut and a 4/5 chain

as long as you dont run all of the hoses together it will work fine. they are just case vent tubes so the case pressure has somewhere to go. u cant plug them but if u buy a crank case breather from autozone or something and run them into that then your good.

It's been said that the results would be different between machines.
I personally think that ring gap has something to do with it.
Since most people having problems were bb'd, I think they were running a large ring gap causing a lot of blow by into the case.
After a recent bout with Wiseco's rings and pistons, I think that would cause a problem since the wiseco rings have a preset gap of almost .040".
That's crazy! I am running a JE with an .018" gap now and it runs way better with much less blow out of the black box.

I'm thinking of ditching the box also, since I also have a problem with the MCCT and the box hitting.
I may use a Y from the big V/C vent with the bottom of the Y toward the oil return line on the cylinder. Then route the other end of the Y toward the headlight with a breather on it.
That way any oil blown out of the V/C would be aimed toward the return line, and less likely to come up toward the breather.

Worth a shot.. It may not be lighter or faster.. but definitely easier to work on.

I got my black box to fit in with my stock converted MCCT. I have to tighten done the tensioner bolt almost all the way and then fish the box in there. One way in, one way out. I fits but just barely. Using a T would make more room on that side of the FCR....don't really need it right now but might do this in the future. I took it off one time just after the engine was warmed up and idling...there was about a tablespoon of oil in it.

I think it is better to have the valve cover and case connected and a vent off of that line then to have independant vents. Having them linked allows any blowoff oil to be reciculated instead of going out a vent breather.

Camero, with the clear tubes....what do you see happening? Which way do you see oil going?

That thing is a pita and it's in the way. I'm not sure why you couldn't get it in with the mcct. I can still get mine in and out.

I am going to get rid of it (at least try it).

It sounds like there is no good reason to leave the hose to the intake boot in there and I've kind of wondered it I did the mod to get rid of the box, what would keep oil from going into the intake..........kind of a downhill run.

So what would you use to plug the hole in the intake boot?

i really don't see any oil running, its more like little oil vapors that collect on the sides of the hoses.

if one of you guys can get some pics of how to do this i bet it would be appreciated!

thanks!

I got mine done.. so far so good. I've got two weeks before my first mx race, so I'm going to do some hard testing to see if it blows.

I ran the v/c vent to one end of the T and the end opposite it to the return line. Then the 3rd leg I ran straight up and away from the others with an inline filter.. so if some oil does work it's way up that far it should collect in the filter before spewing out.

I'll let you guys know how it does on the first hard run.

i like that idea. im going to do some re-arranging of mine

I'm gonna laugh in a few months, when the oil starts spewing all over the place. I played with this for a year and a half (mid '04 to the end of '05), every combination you could possibly think of between large diameter fuel filter (for oil-catch volume), PCVs, large diameter tubing - all of it. I was running an Athena with 0.015" ring gap. Wasn't blow-by from the combustion gases.

Have fun with it, work with it for awhile, but you'll eventually put the black box back on there, once you're wet with burning oil. I tried it for a long time, just because the Edelbrock carb kit came with the tubing, T fitting, and instructions on how to do it. I was determined to make it work. I lost 1 1/2 quarts of oil during one 5-lap MX moto with my most advanced design, spinning anywhere from 5k RPMs to 11k RPMs the whole time. It didn't work with no Black Box.

Edelbrock eventually stopped including that T fitting, tubing, and instructions from their LTZ carb kit, too. Think about that. Removing the Black Box might work for you for awhile, but you're gonna get soaked with some hot oil sometime. That's a guarantee.

i just wana move my box because the lectron s choke is on the inside and its a pain to reach.

fwiw my breather smelledl like oil so i took it off. I was able to mod my tensioner enough so that now I can actually slide the box in. Might try it again later but for now I'm leaving it alone I don't want to mess with the Z much anymore.

if anyone is interested, before I modded the tensioner I could not physically get the box or the tensioner in no matter what order I tried. I couldn't find a local M12 jamnut, so i took a smaller 8 mm nut, and then ground it down to about half the thickness, about 1/4" or so. Then I drilled it out and tapped to the M12, then i kept grinding down the bolt until it was the perfect length that it would bottom out at the same tame that the tensioner was. Now I have plenty of room to take the box off. It is still a pain to adjust it while its there, so if I need to adjust the tension I just take the box out quick

I just did the MCCT mod and fought for an hour to get that damn box back in.

There has to be a way to get rid of that box with no problems.

I don't understand why it's a pain to adjust the cam chain with the box in...I've got 7/8" total sticking out and have about 1/4" till it would hit the black box. I can get a wrench on it no problem. I can't get the box out anymore though. I think if I can tighten the mcct down all the way I could get it out. I did have to take out the bolt on the box so it would move enough for me to loosen up the cam chain to adjust my valve lash last time.

This may have been covered.......but what about moving the box?
Can the hose to the intake be abandoned and the black box still perform it's function properly? (I know that's probably a dumb question but ya never know)

i cant get the feel for how tight to tension the chain when im cramming my hand back there trying to turn the bolt

Well, so far it's been dragged to the rev limiter atleast 20 times, mx'd for 20 laps and about to start TT, 10 lap heats with 20 lap mains, with no problems yet.
I used a large diameter tubing and stepped down to a 3/8 large inline fuel filter.
Nothing in it, and no smell yet. I carry the black box just incase it get's a wild hair.

You mean I'm supposed to be doing that by hand?
I've been using a wrench.....I thought it was going off sound more then feel. I loosen it up till the chain starts rattlin' then tighten back down till it stops.
How should I be doing it?

^^^^ Thats how I started doing it. At first I went by feel, started the bike up and it sounded like I had a shyt load of BBs in the cylinder. Shut it off, tightened it up as far as I could by hand, started it again and backed out until it started to tick, went in until that was gone and tightened the jam nut.

Still nothing guys..
It was said before that the oil blow out was random among Z's.
Some did, some didn't.

So far I've put mine through hell and no blow out..

Hmmmm...lets see...I have been through 2 motors, 3 years, 3 different size big bore kits, two different sets of cams, 3 different exhausts, 3 different carbs, 3 different intakes, @ sets of valves, two different heads, about 4 pistons, 5 sets of rings, Several bottles of Nitrous, several sets of tires, many dozens of tanks of fuel...and WOW!!!!! still no puking of the oil out of my breather. I took it off when i first bought the bike. Anyone want a extra black breather box? Its been in my attic for 3 years and trust me...I dont need it. I'll GIVE it to anyone willing to pay shipping. But seriously...I think I found out why my never has puked oil. My plastics are green.....lol!!! I do think if I can manage to drive the bike upside down for a short distance, I think I can get some oil to come out the breather....

LTZGuy, how is yours routed?

i have a hose coming up from the cylinder toward the front and toward the valve cover. I have a short piece of hose that connects a "T" and If you look at it from the side the T points front to back on top of the valve cover. The hose from the cylinder joins here. Then the other leg pointing forward is hooked to a hose about 2 feet long going into a uni breather with a zip tie loop on it zip tied to the to steering stem bracket on the frame. I also have an outer wears on it to keep sand out. I did have the breather hose much shorter, it was about the height of the airbox. I never had any problems with the line being short as far as oil coming out...but the reason I extended it was Creek and river ride alot, So i end up in deep water alot and If the bike gets submerged higher than the air box, no water will get in the breather....unless higher than the handle bars...Because one time I partially sunk it and filled the engine with water unknowingly and rode all day with water in the oil....prolly not a good thing...and I was drag racing on a sand bar like that...
The only drawback (if you can call it that) is when I first change the oil, there is a oil smell emitting from the breather that doesnt last long. I have never had any oil "puke" out or anything. I dont ride wheelies on purpose often, but when im racing more times than not...i'm on the back tires through the first few gears.

How would this work out with wheelies? I like doing wheelies. Also can you take pics? Kinda confused on it.

i have rode wheelies with it, i just dont do it all the time. you wont have a problem.

try doing some slow wheelies and see what happens..

Yea Imma leave my box on. Just relocate it up to where my snorkel used to be.