Wildgoose Chase Moto Guzzi

General Category => General Discussion => Topic started by: Bazil on May 01, 2021, 11:48:38 PM

Title: Reducing buffeting
Post by: Bazil on May 01, 2021, 11:48:38 PM
Hi All;

The preamble : about 15 months ago I treated myself to a nice modern helmet - carbon fibre, internal visor , nice graphics etc to replace my $ 60 special. I was disappointed to find it was so loud, and there was a thrumming kind of buffeting above legal speeds  that 100 kph here). I have heard that the thinner carbon fibre is more prone to this.

It did annoy me and I bought an MRA Xtream add on to the standard Mark IV screen. It helped a bit but still wasn't the best - doesn't look great either.  I just persevered.

Then, I had the misfortune to break my screen. Had it replaced by Eagle Screens in Perth ( same profile, greyish rather than brownish tint). To my pleasant surprise, the buffeting has largely gone, even at high speed. If I tuck in lower, the buffeting increased, but in a normal position, it's right in a sweet spot.  Didn't even bother trying to re-fit the MRA extension. 

The original LeMans screen has a plastic edging on it ( I think this was to make it comply with Euro regulations?). The new screen does not, so obviously this was creating turbulence right where I didn't need it.  I am a very happy camper !

So, if you have a screen with that plastic beading on the edge and experience buffeting, maybe try removing it to see if it improves.

Cheers

Bazil
Title: Re: Reducing buffeting
Post by: oldbike54 on May 01, 2021, 11:51:06 PM
  :thumb: Good information .

 Dusty
Title: Re: Reducing buffeting
Post by: lazlokovacs on May 02, 2021, 12:09:41 PM
OP is absolutely right

I had exactly the same experience with my Lemans about 10 years ago

Title: Re: Reducing buffeting
Post by: Two Checks on May 03, 2021, 12:07:31 PM
Also if the screen has a little "flip" at the top that creates turbulence.