Vented number plates - Hidden Purpose?

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3/16/2018 7:03 AM

Seeing some of the old moto pics, I noticed that vented numberplates were pretty popular, and there are actually people still using those. Made me wonder, what purpose did/do the vents serve? Was it to cool down oil in the forks? If so, what made them pretty much fade as a thing of the past? Can't see another reason for them.
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3/16/2018 7:05 AM

More airflow to radiators and motor, at least that was the theory.

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3/16/2018 7:15 AM

Because the Rinaldi Yamaha's had them in the late 90's and they looked cool!

They were a pain though, your numbers got torn to bits with the pressure washer spraying through those holes :-)

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3/16/2018 7:28 AM
Edited Date/Time: 3/16/2018 7:28 AM

I just made one for my Yz250f. It seems like it would serve a better purpose on this bike because the intake is right behind the number plate. Photo

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Instagram: vanillaice782
Amateur helmet painter

3/16/2018 7:30 AM

The vented plates on outdoor factory Suzuki’s were the trickest. They put a background on a stock plate then cut out the bottom part of the plate around the number and riveted in some screen behind it. Look up Ricky’s 07 outdoor bike to see what I’m talking about. It wouldn’t be too hard to duplicate.

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3/16/2018 8:49 AM

Copter that thing is sick. Makes me wanna try it with my KX front plate.

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3/16/2018 9:11 AM

I quit like the vented plate that Mickael Pichon used to have on his RM250. It was just a load of holes drilled into the plate.

http://www.mickael-pichon.com/photos/2003/gp09/pichon_03_gp09_05.jpg

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3/16/2018 9:37 AM

I would imagine that the Yamaha would benefit a vented plate?

TM comes with a "vented" plate.

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3/16/2018 10:23 AM
Edited Date/Time: 7/29/2020 6:44 PM

Nice

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3/16/2018 10:28 AM

Love mine. So retro.Photo

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3/16/2018 10:29 AM

FCMX wrote:

Love mine. So retro.Photo

So mint

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3/16/2018 10:31 AM

Motofinne wrote:

I would imagine that the Yamaha would benefit a vented plate?

TM comes with a "vented" plate.

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3/16/2018 11:23 AM
Edited Date/Time: 3/16/2018 1:32 PM

I just made yet another vented numberplate on my '89 Vintage racebike. Mine's not only for added cooling but actually also providing added airflow into the airbox as my '89 CR 125 has a italian VRP aluminium gas tank with two air tunnels that guide air directly into the airbox.

Kind of a "RAM-Air" intake found on Superbikes wink

Cutting the hole:
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Fitting the aluminium mesh:
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Cutting the numbers out of plastic sheet:
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Ready to go:
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Right behind the numberplate the air gets funneled down into the airbox:

Photo

...through channels that go through the gas tank...:

Photo

....from the front back down into the airbox:

Photo



AND speaking of TM:
The 2018 Factory TM shares the same basic idea: funneling air from behind the numberplate directly into the airbox!
I showed pictures of my '89 VRP Bike to the Factory TM mechanics they were a little surprised to see basically the exact same thing already done like 30 years ago ;O

2018 Factory TM 250 of Samuele Bernardini

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Nino's 1989 (!) , aluminium framed VRP Mugen Honda CR 125...already with similar airchannels wink

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3/16/2018 11:50 AM

Nino coming up with the goods again! Nice job, thank you!!

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3/16/2018 2:21 PM

luckynino wrote:

I just made yet another vented numberplate on my '89 Vintage racebike. Mine's not only for added cooling but actually also providing added airflow into the airbox as my '89 CR 125 has a italian VRP aluminium gas tank with two air tunnels that guide air directly into the airbox.

Kind of a "RAM-Air" intake found on Superbikes wink

Cutting the hole:
Photo

Fitting the aluminium mesh:
Photo

Cutting the numbers out of plastic sheet:
Photo

Ready to go:
Photo

Right behind the numberplate the air gets funneled down into the airbox:

Photo

...through channels that go through the gas tank...:

Photo

....from the front back down into the airbox:

Photo



AND speaking of TM:
The 2018 Factory TM shares the same basic idea: funneling air from behind the numberplate directly into the airbox!
I showed pictures of my '89 VRP Bike to the Factory TM mechanics they were a little surprised to see basically the exact same thing already done like 30 years ago ;O

2018 Factory TM 250 of Samuele Bernardini

Photo

Photo

Photo


Nino's 1989 (!) , aluminium framed VRP Mugen Honda CR 125...already with similar airchannels wink

Photo

Holy smokes.... that is amazing!!!

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3/16/2018 2:56 PM

I always wondered how much the vented plates actually helped airflow to the radiators. Regardless of their performance, they looked bitchin!

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3/16/2018 3:27 PM

Always loved the vented plates. Everyone's looks sick on here too, nice work

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3/16/2018 3:39 PM

Was it ktm that had an open upper frame tube to funnel air to the air box?

Im think with the air intake systems it might be the cooler air combined with 'ram" affect that makes it worth while??

Old kdx enduro bike headlight surround.Photo

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3/16/2018 3:44 PM

All of the posted flo plates look sick! I always liked the vented front fender too!

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3/16/2018 3:46 PM

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3/16/2018 5:48 PM

We ran a vented front plate on Goerke's '17 YZ450 in canada last summer... Our bikes ran unreal hot and I was doing anything and everything I could think of to help lower temps...

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3/16/2018 5:59 PM

luckynino wrote:

I just made yet another vented numberplate on my '89 Vintage racebike. Mine's not only for added cooling but actually also providing added airflow into the airbox as my '89 CR 125 has a italian VRP aluminium gas tank with two air tunnels that guide air directly into the airbox.

Kind of a "RAM-Air" intake found on Superbikes wink

Cutting the hole:
Photo

Fitting the aluminium mesh:
Photo

Cutting the numbers out of plastic sheet:
Photo

Ready to go:
Photo

Right behind the numberplate the air gets funneled down into the airbox:

Photo

...through channels that go through the gas tank...:

Photo

....from the front back down into the airbox:

Photo



AND speaking of TM:
The 2018 Factory TM shares the same basic idea: funneling air from behind the numberplate directly into the airbox!
I showed pictures of my '89 VRP Bike to the Factory TM mechanics they were a little surprised to see basically the exact same thing already done like 30 years ago ;O

2018 Factory TM 250 of Samuele Bernardini

Photo

Photo

Photo


Nino's 1989 (!) , aluminium framed VRP Mugen Honda CR 125...already with similar airchannels wink

Photo

That's a amazing idea I wouldnt be surprised if top manufactures start doing that.

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3/16/2018 7:05 PM

I made this number plate for my YZ125. It gets the job done. Photo

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3/16/2018 7:08 PM

Nino wins the internet again, LOL!

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3/16/2018 7:18 PM

Donk122 wrote:

We ran a vented front plate on Goerke's '17 YZ450 in canada last summer... Our bikes ran unreal hot and I was doing anything and everything I could think of to help lower temps...

Remember Simon homans Yamaha vented fenders? I remember the year he was #4. He had these trick looking side scoops on his front fender.

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3/16/2018 7:28 PM

go full vented number plate if you have to or none at all for ball sack ventilation

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3/16/2018 8:19 PM

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3/16/2018 9:38 PM

The weirdest and/or ugliest thing Honda ever did was make a plate that only the people in the nose bleeds could read.

They just tilted the plate up. That was the year I think Preston Petty made those large plastic plates that had holes pre-drilled.
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3/16/2018 10:44 PM

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3/17/2018 1:22 AM

.kyle wrote:

I quit like the vented plate that Mickael Pichon used to have on his RM250. It was just a load of holes drilled into the plate.

http://www.mickael-pichon.com/photos/2003/gp09/pichon_03_gp09_05.jpg

Photo

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2020.5 KTM Cairoli Factory Edition 5.7hrs
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imoto34 wrote:
Look at all that torque. The kid on the lawnmower may have laughed so hard he shat his pants.