DIY - Emission block off plate

[MikeBudd]

Hey Everyone, here with one of the easiest and most surprising installs I have ever done on my ninja, almost easier than installing spools

**Read the end if you want the reasons why I suggest doing this**

So, awhile back I was asking some questions about the kleen air system, and the emissions block off.

In the DIY by our long lost beloved kkim here he simply uses his own homemade plug. Lots of others have followed suit: most notable being @VeX who i'm sure did the same thing, or maybe kkim copied him

Anyways, long story short, I did the same thing with a vacuum cap, and then later on a improvised plug. During my questions, @indrish had advised me of something called an emission block off plate that can be installed instead of the plug. We both live in B.C. so we decided to each get one (he will be doing an airbox and kleen air removal eventually), and split the shipping. This is the one we picked up.

If you clicked that link, you would see the plate looks very orange in colour. In reality, it is gold

This is what it looks like:



Onto the install.

Looking at your bike under the gas tank on your engine, if you have already removed the kleen air system (if you haven't see the DIY and do so), you will see something like this:



For perspective:



If you look closely you will see I have already loosened the bolts. Go ahead and remove them. Place them somewhere handy.

Now, look at the piece you have removed:





Lots of extra space inside. <-- IMPORTANT LATER ON

Anyways, put your emission block of plate on and screw it in using the bolts that held the piece you just removed down.

You should now have something like this:



For perspective (sorry for my terrible focus job):



Looking SMEXY!

Now onto the important part of why I created this DIY

At first I had assumed that this emission block off plate would simply remove a failure point that I did not want to have on the bike (oh, and add a little bling), what I didn't realize was this:

I had been experimenting trying to get my jetting right. Found the right main's, replaced my pilots, I believe I have the optimum needle settings, but I was still having bog in the lower range of 1.5-3ish k RPM. I was adjusting idle mixture screws but I could never get it just right. I believe I am at around 2.5 turns or something around there. Maybe less. Anyways, when I revved the RPM's would drop below my idle setting then return. However, this would only happen on rev's up to around 5k rpm. Anything above that and it returned like it would supposed to. Which I thought was very strange because I thought it was supposed to happen no matter what?!

When I got home after picking up the emission plate and meeting up with @indrish, I was like: Hell, I'll work on this jetting nonsense later and do this super easy install!

I tested the bike again after letting it cool down, and I still had the problem. I replaced the vacuum capped emission with the block off plate and wait for it..... ALL MY STRANGE PROBLEMS WENT AWAY! It fixed all of the lower end bogging issues, gave me a much cleaner and better take off, and possibly even a little more umph in the low range :roll eyes:

I am assuming this was caused by the space previously created by the vacuum cap. I removed the emission block off and replaced it with the old one, and plugged it instead of capping. It fixed the problems a bit, but without that tight seal that the emission cap added, it was still a no go. Went back the the emission block off, and it works perfect!

I actually tested it, and my midrange seems to be slightly improved (along with all the other fixes), and a noise that I use to hear while running (a strange crackling when the engine was working hard), is gone (it comes back when I replace the block off with the original capped piece).

Now I could have spent a much longer time working on the idle mixture screws and even playing with the needles a little bit more, but this one easy mod (max 20 bucks), fixed all of my problems, eliminated a failure point, added some bling, and seriously made my life easier.

If anyone is considering removing their kleen air system, personally I would recommend this so you don't have the problems I had. I would recommend it anyways just to eliminate the possibility of anything bad happening :P

PS: Thanks @indrish.

[Alex]

/linked from main DIY thread

[str8t six]

i was debating on whether to get this plate or not when i do this mod.
you have now convinced me! thanks for the writeup!

[MikeBudd]

Originally Posted by Alex

/linked from main DIY thread

Success

Originally Posted by str8t six

i was debating on whether to get this plate or not when i do this mod.
you have now convinced me! thanks for the writeup!

Awesome! Originally I was debating as well, and I hoped this would help some people make up their minds! Good to know it did

[indr]

Looks good.

Source: http://www.slingshotracing.net/catal...ate-p-204.html

[MikeBudd]

Originally Posted by indrish

Looks good.

Source: http://www.slingshotracing.net/catal...ate-p-204.html

It's in the DIY at the very top. :thumb up:

Get yours installed yet?

[leed]

Aside from the performance gains you seemed to have achieved, is there any particular reason why sealing this off is better than using a breather? It was to my understanding that by sealing it you're pressurizing and sealing in the blowby gasses that escape into the crankcase?

[choneofakind]

This is the Kleen system, not the crankcase vent hose. The Kleen system adds air from the airbox to the exhaust, which then allows the hot cats to burn off excess fuel. The crankcase breather allows excess oil pressure to be blown out so the crankcase isn't pressurized.

[leed]

Originally Posted by choneofakind

This is the Kleen system, not the crankcase vent hose. The Kleen system adds air from the airbox to the exhaust, which then allows the hot cats to burn off excess fuel. The crankcase breather allows excess oil pressure to be blown out so the crankcase isn't pressurized.

Gotcha. For some reason, and from whatever literature I read in the past, I came to the conclusion that that was the crankcase vent. Looking at some exploded diagrams.. The breather is actually attached to the crankcase elsewhere haha.

[indr]

You can use a breather on there, too. Works just fine.

[cuz]

Did y'all leave this piece in OR took it out?

[alex.s]

does anyone have a diagram of the internal passage from the kleen air port on top down through the two tubes next to the spark plugs into the exhaust?

[rojoracing53]

You leave it in, it contains the gasket to make the seal.

[Mountain Dew]

So the only purpose of the Kleen system is to lower emissions (from the unburnt fuel), correct?

[rojoracing53]

Originally Posted by Mountain Dew

So the only purpose of the Kleen system is to lower emissions (from the unburnt fuel), correct?

No the only purpose of the Kleen system is to clutter your engine compartment with a bunch of useless hose and crap, and in my opinion it performs this function flawlessly.

[mkulchar]

Originally Posted by Mountain Dew

So the only purpose of the Kleen system is to lower emissions (from the unburnt fuel), correct?

in short, yes

[jhunter]

Any disadvantages to taking it out?

[rojoracing53]

Originally Posted by jhunter

Any disadvantages to taking it out?

Bike wise no, but you will be killing the environment.

[rojoracing53]

I make my own plates for all my bikes

[jhunter]

Originally Posted by rojoracing53

Bike wise no, but you will be killing the environment.

Legitimate disadvantage.lol

[EsrTek]

Originally Posted by rojoracing53

Bike wise no, but you will be killing the environment.

I understood it if you changed to an aftermarket full exhaust system, this Kleen system needs to come out.
If your running stock exhaust, then I bet it will have adverse effects when removed. The cats would overheat and break apart, possibly blocking the exhaust flow completely.

[Asspire]

only advantage to leaving it is fire, fire is good.

Link to original page on YouTube.

[Mountain Dew]

Originally Posted by EsrTek

If your running stock exhaust, then I bet it will have adverse effects when removed. The cats would overheat and break apart, possibly blocking the exhaust flow completely.

I'm not sure if you're being serious or not... In the off chance you are, the kleen air system blows air into the exhaust to ignite the unburnt fuel, not to cool down the cats.

[Mountain Dew]

Originally Posted by Asspire

only advantage to leaving it is fire, fire is good.

Link to original page on YouTube.

Haha I had that happen on my CB550 with a loose intake valve and exhaust leak :P

[EsrTek]

Originally Posted by Mountain Dew

I'm not sure if you're being serious or not... In the off chance you are, the kleen air system blows air into the exhaust to ignite the unburnt fuel, not to cool down the cats.

That's how it was explained to me, and makes more sense then air being able to ignite unburnt fuel..
Guess I can get rid of them useless spark plugs then!!

[Mountain Dew]

Originally Posted by EsrTek

That's how it was explained to me, and makes more sense then air being able to ignite unburnt fuel..
Guess I can get rid of them useless spark plugs then!!

Well with no air (only exhaust gasses), the fuel won't ignite. Add the air, and combined with the exhaust heat (acts kinda like a diesel's glow plug), it's enough to ignite the fuel. That's where the popping and flames come from when, running lean and using the kleen system, respectively.

(That's how I understand it at least)

[EsrTek]

Originally Posted by Mountain Dew

Well with no air (only exhaust gasses), the fuel won't ignite. Add the air, and combined with the exhaust heat (acts kinda like a diesel's glow plug), it's enough to ignite the fuel. That's where the popping and flames come from when, running lean and using the kleen system, respectively.

(That's how I understand it at least)

Makes more sense... last night I was a bit tired and not thinking clearly (damn all this traveling).

[jwaychoff]

good info, thanks for posting. dumb question as always: i just installed my emission blockoff, i assume i simply remove all the bs hoses that used to be connected to the oem system? if i don't do this right away are there any adverse affects, i.e. will it mess up something else on the bike by leaving it for the short term?

[rabies]

will these fit on the pregen? do the pregens have emission junk on them?
i havent looked at the motor and its hoses since purchase :/

[choneofakind]

Originally Posted by rabies

do the pregens have emission junk on them?
i havent looked at the motor and its hoses since purchase :/

California models do. The rest of the pre-gens don't have any sort of emissions crap.