UK Monster Owners Club Forum .: General :. Random Chat » Woss this flappy fing?

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Old 29-06-2022, 08:13 PM   #1
Mr Gazza
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Woss this flappy fing?

I recently managed to find a pair of yokes from a M900ie (apparently) from year 2002.
It has the vaguely semi-circular bit of blued steel screwed to the bottom yoke that I've noticed on several other Monsters of that era. It seems to have come in about 2002 when the offset changed from 25 to 30mm and they had a little re-design at the same time, adding a peg hole stem top nut for instance.

Question is what on earth does the flap of steel do?



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Old 29-06-2022, 08:50 PM   #2
Albie
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It directs air. Nothing else. Removable. Multistrada have them too.
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Old 29-06-2022, 09:47 PM   #3
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It's an abdeckung.

Seriously, it is:
https://www.stein-dinse.biz/product_...ducts_id=50847
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Old 29-06-2022, 09:58 PM   #4
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It's just an early (and more subtle) version of the external wings you see on the MotoGP bikes

Given the huge downforce it must generate for the front end I'd be afraid to take it off
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Old 29-06-2022, 10:25 PM   #5
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Directs cool air over the horizontal, through to the vertical cylinder. Maybe it works.

Much cooler if it was an early down force wing. Maybe it is....
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Old 30-06-2022, 04:17 AM   #6
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keeps water splash from front tyre off the lower bearing?
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Old 30-06-2022, 08:27 AM   #7
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Thanks to all for trying, but I'm sorry to say I don't believe any of you! (That sounds very horrid of me!)

Abdeckung translates as Cover, but it doesn't cover anything?

As for air ducting; I don't think so, it's not big enough to do anything of any use.
Possibly it might direct air onto the rectifier, if indeed it is on the front of the frame on models fitted with the "Abdeflap". The rec would be right in the direct airflow anyway.
Maybe it could smooth out the air before it swirled under the tank into the air box?

Splash guard? Good if there wasn't a gap all round under the bottom bearing!

I've got a theory that it might be something to do with guarding a pinch zone in the event of a frontal impact, but that's a bit off the wall, although I suspect it's something legislative rather than practical.

It seems a bit too robust for an air duct in steel when plastic would do that cheaper and lighter.

As for blued steel, that's just nasty. It's new function is to take up room in my scrap bin.

Happy to hear more theories..
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Old 30-06-2022, 08:49 AM   #8
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Well according to Ducati it is know by two names Parapioggia Rain Cover or Paraspruzzi - Splash Guard
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Old 30-06-2022, 09:12 AM   #9
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told you so
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Old 30-06-2022, 10:34 AM   #10
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My old Guzzi had a similar looking flappy thing except it was made of rubber so was proper 'flappy' - now removed for a cleaner look and if that means I need to change the bearings more often then so be it.

That said, I've never changed them and have no idea if they've ever been changed? (in 43 years) plus it rarely sees rain so I'm probably OK...
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Old 30-06-2022, 11:01 AM   #11
Mr Gazza
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Thank you Kato, and Rob for telling me so..

What an absurd part to dream up, design an actually fit to a production motorcycle??

I'm going to see how long it takes me to find a way to re-cycle it into the new build..

I like the sound of a proper flappy rubber one DD..
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Old 30-06-2022, 11:13 AM   #12
Albie
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They make them now in plastic. It's cheaper in metal to create tooling in plastic.
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Old 30-06-2022, 05:37 PM   #13
Mr Gazza
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Quote:
Originally Posted by Albie View Post
They make them now in plastic.
I can't help thinking that the same amount of plastic added to the back of the mudguard would do more good?
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Old 30-06-2022, 06:29 PM   #14
Albie
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Quote:
Originally Posted by Mr Gazza View Post
I can't help thinking that the same amount of plastic added to the back of the mudguard would do more good?
I still believe its airflow not water. That's what mudguards do. Now working on newer bikes with these strange short top tyre cover ( not a mudguard ) the front cylinders have so much corrosion on them. Rusted out valve cover bolts seized because water doesnt escape. Air boxes covered in grime and sandy grit. Anyhow it's a plate you can throw or keep or throw like a ninja and kill someone.
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