1989 R100GS upgrade step by step - part 3 – screen

[SJRoome]

When thinking about what to upgrade this year I looked into screens again.

The options seemed to come down to:

a) bolt on an early K100 screen as shown here (http://www.ukgser.com/forums/showthread.php/179764-Recommended-screen-for-1989-R100GS).

b) A Secdem screen as shown here (http://www.ukgser.com/forums/showthread.php/429768-Have-you-guys-seen-this-one-for-sale)

c) The MRA Vario screen as shown here (https://motorworks.co.uk/vlive/Shop/Parts.php?T=5&NU=15&M=20&Ct=UA&SbCt=BA_15_20_UA_60)

d) A Wunderlich VarioERGO screen deflector as shown here (http://www.wunderlich.de/shop/en/wunderlich-varioergo-screen-deflector.html)

I went for the Wunderlich option and bought a new one for £75 including delivery on eBay. I went for smoked grey/titanium.

Here are the contents of the box. Strangely the instructions are double sided with the words on one side and the pictures on the other so the first step was to photocopy the words so I could see them side by side with the pictures.

First you cut an adhesive rubber strip and attach it to the screen (in this case wind deflector).

Then you remove the protective film and push on the holder.

Then you insert a shim and rubber pad behind and tighten two grub screws. Finally you attach the screen with two more grub screws. Here is the result.

Wunderlich say you should use a threadlock compound on the grub screws and they are not kidding. I lost 2 grub screws on my first test ride which was only a couple of miles.

 

[Florence]

Mmmm I'm not feeling the love for that

 

[ChasF]

Does it actually do anything?

 

[Rob Farmer]

Does it crtually do anything?

Makes you £75 lighter.

 

[Captain Black]

If it folds flat you could put your cuppa on it

It does look a bit like a wart on pretty thing I'm afraid.

 

[Wreford Miles]

On my 1200 GSA screen it makes an amazing diffrence, I use mine in the forward and low position - they look neater like that as well.

I'd say experiment with diffrent positions, and if you find it works keep it if not put it on here and it will be snapped up for v close to what you paid for it...

 

[solidstate100]

Personally I dont dig it, it looks like what it was made for - a more modern bike such as the hexhead onward GS/GSA.

I have the same oem deflector and when I got the bike it had a flyscreen on it, which moved the turbulent air up to the helmet area and actually made it worse to ride behind. Took the screen off, and the air is now deflected off the chest (which is its main prupose I would say) with none of the turbulent helmet battering.

But its your bike, and what makes you happy and what works for you is what counts. Paint it pink and wear a tutu if you want, but of course posting anything on here will get you (oftern subjective) opinions.......

 

[SJRoome]

Improving the VarioERGO design

The Wunderlich VarioERGO deflector is attached using two M10 x 10mm stainless grub screws. These are Torx rather than Allen key, which means you need to carry another tool with you. Wunderlich state that you should use threadlock on them and regularly check them for tightness and they are not kidding. I lost both screws on the first test ride, which was only a few miles.

I don't like relying on threadlock so I amended the design by using two M10 x 12mm Allan grub screws. I drilled a 1.3mm hole through both using my multi-tool and locked them together with a 1mm stainless split-pin.

 

[SJRoome]

Well does it work?

I added the deflector to reduce the strain on my arms at high speeds. I am 5' 10”. When first fitted with the screen at its highest setting as shown in the photos above I tried a short test ride and found that it was possible to ride hands off at an indicated 75 mph, so the pressure on the arms was gone. I also found myself going too fast into bends as the reduced pressure and noise meant I underestimated my speed.

There was turbulence/buffeting around the helmet between 37 and 50 mph. It was not that severe but moving my head up and down revealed that there was a area where the air rushes smoothly past the helmet above my normal head position and a area of total calm below it, so adjustment was in order.

I next tried the screen in the front fully down position. This was better in the middle speed range but there was quite a lot of buffeting and turbulence above 75 mph.

Finally I tried the middle front position. This gave a smooth ride with little or no turbulence and no pressure on the arms at all speeds from 0 to 80 mph (indicated). Whether you like the appearance of the deflector is a matter of personal opinion, but I am highly pleased with its performance.

 

[Florence]

but I am highly pleased with its performance.

Well that's all that matters