Breva 1100 windshield questions

[flower_king001]

Hi,

 Recent purchase of a 2007 Breva 1100 w/ 11,000 miles. Recently I did the MPH starter no-fix, new battery, Guzzi Tech crossover and Corbin Gunfighter dual saddle.Bike has the taller OEM windshield on it.

 Question...I have shield in the lowest position and raked all the way forward (away from driver). I have no wind buffering but obvious I have full wind in my face. I'm wondering if anyone has had any luck using a Laminar Lip(or any other mod/suggestions)to divert wind out of their face and over their helmet.

Thanks, Brian
1971 BMW R 75\5
1986 Lemans 1000 IV
1998 EV 1100
2007 Breva 1100

[flip]

Brian, I have a 2007 Breva 1100 with a Corbin seat also. I am about 6'1" with a long trunk and very long arms. I have tried a bunch of windshield combos on that bike.

I started with the factory shield and tried different rakes but I had a lot of turbulence. I then tried an idea from Kev M and used some pieces of metal added to the windshield mounts to rake it back flatter.

Then I tried a Laminar Lip. I still had turbulence.

I also tried cutting down a stock shield. That worked pretty good for me as far as turbulence went since it didn't cover much at that point.

Next up was a much larger Memphis Shades windshield. It's not made for the big Breva, it's a universal fit. I don't recall which model exactly. It should be posted a couple of times here in the forum. I still had turbulence.

I also tried an Eagle shield. Better but still not perfect.

I currently have a tall Parabellum windshield. The very top of my helmet catches a little high speed air. I can back off of the rear prelude, which lowers the rear a little and that gets me out of the air completely.

No matter which shield I had on my bike, I would get a good bit of air that comes up from around the gas tank. It's shape seems to channel some air up towards the rider.

[Dean Rose]

I must be the real weirdo here as I only use the Givi A750 shield on my Breva 1100.

Dean

[flip]

I must be the real weirdo here as I only use the Givi A750 shield on my Breva 1100.

Dean

Or, you were smart enough to make the right choice to begin with. The Givi sure does look good on the Breva!

[circlip]

I have an '06 Breva 1100 with the stock (not low) seat. I'm about 5'-11" on a good day with a 32" to 33" inseam. My take is that the stock windshield looks good, but I cannot avoid the turbulence it creates no matter what position it is in. I also tried the tall Parabellum and ended up with lots of helmet buffeting. Parabellum let me return it. They are very easy to deal with.

I have come to the conclusion that wind noise is very subjective and I also am wondering is the gas tank shape on the Breva also contributes. Good luck.

[ChuckH]

Brian,

I have an '07 R1200R, basically the same bike as your Breva 1100 except the cylinders are lower.  I have the tall Z-Tech, V-Stream windshield with a "special" Laminar Lip.  At 5'10" and 32" inseam, I can ride with my helmet visor up without difficulties.

In addition, I use Aerostitch tank panniers to counteract the air coming around the tank and up my chest, plus they offer additional storage volume and protection for my legs up to the knees.  I also use a tank bag to protect me from the air coming up between the forks and across the tank.  Last, a set of Barkbusters on the handlebars protects my hands from the cold and rain.

In total, this has been a very good combination for my longer distance trips.  Ride safe.

[bedevil]

Brian,

I have a 2006 Breva 1100 with the stock seat. I'm 5'11' with a 32 inseam.  Like most others I could never get rid of the buffeting no matter what mods I made to the stock shield. I then bought the tall Parabellum shield and for me it was a great improvement but not quite perfect.  I no longer have the buffeting but I do get a little airflow that is noisy.  I think my experience is pretty identical to Flip's. 

[tris]

I'm a bit shorter than you guys but I found that if  the screen was tight on the headlight I got buffering but if there is a 1/2 inch gap it doesn't.

[derek533]

Have the stock shield on my 06 Breva.  Honestly, I don't find the wind to be that bad and I'm 6'0 with 34" inseam except at the mid-point of my faceshield on my helmet and I honestly don't see any windshield being able to completely alleviate that. 

[bedevil]

Tris,  are you using the stock shield or one of the aftermarket products? If its the stock shield I'd like to give your mounting method a try. I still have mine even though the Parabellum is now on the bike.

There have been a number of posts on this forum that venting a shield will reduce or eliminate buffeting. I wonder if mounting it a half inch higher provides the same effect as a vent.

[tris]

Stock screen fully raked back

It was tight on the light initially to minimise any water driving into the back of the clocks but I've subsequently waterproofed the clocks to within an inch of their lives so that is less of a concern to me

I've also been toying with the idea of some sort of duct behind the gap to turn the incoming air such that it flows up the inside face of the screen - watch this (likely to be long) space 

[bedevil]

We share the same concern about keeping the dash dry.  What did you do to waterproof while maintaining good visibility?

[tris]

On balance I think that the clock problem is caused by poor ventilation/condensation rather than water ingress so I shied away from the dismantling/conformal coating solution as the risk if I cocked it up dismantling the clocks to do it was too high for me.

However, what I did was

a) silicone very possible crack and gap I could see to remove the water ingress concern
b) fit a piece of fish tank air pipe and an elbow to 3 of the 4 vents so that any water has to go upwards before it can get to the clock
c) I found that one of the lower vents was blocked so opened that up. This was where I saw any condensation after a cold ride
d) I also ran a length of pipe from one of the lower vents to between the cylinders.

My theory behind all this is that the instruments heat up and draw in cold air that then condenses. So, improving the ventilation and providing a source of warmer/dryer air should help.

I may not have fixed things but I can't see that I will have made it any worse

[grahn@talktalk.net]

Yes the Laminar Lip works well on the oem screen. It lifts the wind a couple of inches great for a 6ft guy. Use the supplied plastic nuts and bolts to fix otherwise it will come off.

[flower_king001]

Hi,

 I want to thank everyone who has replied to this thread. I'm going to give the Laminar Lip a try.

Thanks again! Brian

[ChuckH]

Hi,   I want to thank everyone who has replied to this thread. I'm going to give the Laminar Lip a try.
Thanks again! Brian 

Brian,

I would suggest you call Laminar Lip, tell them what equipment you have, what the problems are and what you are looking to do with your bike.  They have a history file available to them of what works and what has not been effective.  They may be able to make a suggestion based on that experience.

For my bike and the equipment I am using (see post above), they did not have an effective Lip available.  So, I shipped my windshield out to them along with various pictures of the bike and riding position.  They created a one-off Lip for my application.  It has been very effective for me and my use.

Ride safe.