Engine Block off plates

Enrgkid · December 9th, 2014, 05:55 PM

Okay guys I have a Carbied 09 Ninja 250r, and have been looking for information regarding block off plates, can anyone tell me what they do, why I would get them, and if they change anything significantly enough for me to realise while I ride?

alex.s · December 9th, 2014, 06:28 PM

the block off a hole. you use them when you take something off and there is a hole left.

EsrTek · December 9th, 2014, 07:45 PM

I have one I never used... PM me addy and I'll send it out.

cbinker · December 10th, 2014, 08:18 AM

Quote:

Originally Posted by alex.s

the block off a hole. you use them when you take something off and there is a hole left.

what hole is blocked? the in hole or out hole?

EsrTek · December 10th, 2014, 08:37 AM

Block off plates are used for when you remove the AirClean system (for emissions).
When you remove that it leaves a open hole into the engine, the plates close that off.

Removal of this system should only be done when chaining full exhaust system, I believe.

alex.s · December 10th, 2014, 09:29 AM

Quote:

Originally Posted by cbinker

what hole is blocked? the in hole or out hole?

depends on your religion

Foxrider64 · December 10th, 2014, 09:56 AM

Quote:

Originally Posted by EsrTek

Removal of this system should only be done when chaining full exhaust system, I believe.

You can remove it anytime you want. It just helps with backfiring and popping when changing to full exhaust and not adjusting the jets

JohnnyBravo · December 10th, 2014, 11:56 AM

Does it do anything besides just help popping an backfiring?

Ghostt · December 10th, 2014, 12:49 PM

Quote:

Originally Posted by alex.s

depends on your religion

It's cool, I only date 3 input girls, just like my prom date

alex.s · December 10th, 2014, 12:56 PM

Quote:

Originally Posted by Ghostt

It's cool, I only date 3 input girls, just like my prom date

never disrespect the screaming eagle, boy.

5 ports. Simultaneous data transfer.

Racer x · December 10th, 2014, 12:57 PM

The holes on the top of the valve cover go directly into the exhaust system. They allow air to enter the exhaust to aid the catalytic converter. Unburned fuel needs oxygen so the cat can burn it.
If you have no cat the air will cause a POP sound when decelerating.

alex.s · December 10th, 2014, 01:02 PM

Quote:

Originally Posted by Racer x

The holes on the top of the valve cover go directly into the exhaust system. They allow air to enter the exhaust to aid the catalytic converter. Unburned fuel needs oxygen so the cat can burn it.
If you have no cat the air will cause a POP sound when decelerating.

so in an engine with no cat and high flow exhaust, with no care of emissions, it would be better to have no extra oxygen into the exhaust, right? so you can keep the headers cooler as they aren't burning unburnt fuel in there? the unburnt fuel would just go out the tail pipe instead of burning... maybe even the unburnt fuel would help cool the exhaust walls? am i close?

Racer x · December 10th, 2014, 01:16 PM

The cat needs oxegen to burn the fuel. Without a catalist the fuel and air would not burn. You want the heat to stay in the exhaust system. That is why we wrap headers.

alex.s · December 10th, 2014, 01:33 PM

Quote:

Originally Posted by Racer x

You want the heat to stay in the exhaust system. That is why we wrap headers.

this is something i've never understood... why should the headers be hot? as in, if you could do something to aide cooling the headers, why not? what is better about a hot header? i mean if you don't have a cat and don't care about emissions

Racer x · December 10th, 2014, 01:48 PM

The point is to have a proper fuel mixture knside the engine. Header heat is not the goal. But hot headers move gases better. I will find out why. I know but can't explane.

alex.s · December 10th, 2014, 05:00 PM

Quote:

Originally Posted by Racer x

But hot headers move gases better

i've heard before that hotter fluids have less coefficient of friction because of the decreased mass per area... maybe it's something like that?

December 9th, 2014, 05:55 PM	#1
Enrgkid Boy Racer Name: James Location: Sydney Join Date: Oct 2013 Motorcycle(s): 08' NINJA 250R, 2013 BMW HP4 Posts: 41	Engine Block off plates Okay guys I have a Carbied 09 Ninja 250r, and have been looking for information regarding block off plates, can anyone tell me what they do, why I would get them, and if they change anything significantly enough for me to realise while I ride? __________________________________________________ Ride List: Current: 09' Ninja 250r Previous: 99' ZZR250

December 9th, 2014, 06:28 PM	#2
alex.s wat Name: wat Location: tustin/long beach Join Date: Sep 2009 Motorcycle(s): wat Posts: Too much. Blog Entries: 5 MOTM - Oct '12, Feb '14	the block off a hole. you use them when you take something off and there is a hole left. __________________________________________________

December 10th, 2014, 08:37 AM	#5
EsrTek ninjette.org certified postwhore Name: Eric Location: Murfreesboro, TN Join Date: Jun 2011 Motorcycle(s): '13 300 Posts: A lot.	Block off plates are used for when you remove the AirClean system (for emissions). When you remove that it leaves a open hole into the engine, the plates close that off. Removal of this system should only be done when chaining full exhaust system, I believe.
	1 out of 1 members found this post helpful.

December 10th, 2014, 11:56 AM	#8
JohnnyBravo Certifiable nontundrum Name: Harper Location: NC Milkshake stand Join Date: Mar 2013 Motorcycle(s): 2013 SE NINJA 300 Posts: Too much. MOTM - Sep '13, Sep '16	Does it do anything besides just help popping an backfiring? __________________________________________________

December 10th, 2014, 12:57 PM	#11
Racer x ninjette.org certified postwhore Name: Eric Location: Iowa City Join Date: May 2009 Motorcycle(s): 2008 Kawmeracchi 350 2010 Project X Posts: A lot. Blog Entries: 54 MOTM - Sep '18, Feb '16	The holes on the top of the valve cover go directly into the exhaust system. They allow air to enter the exhaust to aid the catalytic converter. Unburned fuel needs oxygen so the cat can burn it. If you have no cat the air will cause a POP sound when decelerating. __________________________________________________ Top speed 123.369mph. Ohio mile Worlds fastest 250 ninja

December 9th, 2014, 07:45 PM	#3
EsrTek ninjette.org certified postwhore Name: Eric Location: Murfreesboro, TN Join Date: Jun 2011 Motorcycle(s): '13 300 Posts: A lot.	I have one I never used... PM me addy and I'll send it out.

December 10th, 2014, 01:16 PM	#13
Racer x ninjette.org certified postwhore Name: Eric Location: Iowa City Join Date: May 2009 Motorcycle(s): 2008 Kawmeracchi 350 2010 Project X Posts: A lot. Blog Entries: 54 MOTM - Sep '18, Feb '16	The cat needs oxegen to burn the fuel. Without a catalist the fuel and air would not burn. You want the heat to stay in the exhaust system. That is why we wrap headers. __________________________________________________ Top speed 123.369mph. Ohio mile Worlds fastest 250 ninja

December 10th, 2014, 01:48 PM	#15
Racer x ninjette.org certified postwhore Name: Eric Location: Iowa City Join Date: May 2009 Motorcycle(s): 2008 Kawmeracchi 350 2010 Project X Posts: A lot. Blog Entries: 54 MOTM - Sep '18, Feb '16	The point is to have a proper fuel mixture knside the engine. Header heat is not the goal. But hot headers move gases better. I will find out why. I know but can't explane. __________________________________________________ Top speed 123.369mph. Ohio mile Worlds fastest 250 ninja

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