Windshield cracked after install. What did I do wrong? - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 23 Old 11-18-2017, 01:30 PM Thread Starter
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Windshield cracked after install. What did I do wrong?

Way back in January, I accidentally broke a perfectly good Givi windshield.

A helpful Stromtrooper practically gave me a replacement, a Pat Walsh Designs of roughly the same size, so that's what I've been using since.

I tried to be careful installing it, and indeed managed to get it on my Madstad bracket without a scratch.

However, within a few weeks there were cracks around the right side mounting holes, seen here:



What did I do wrong?

I didn't think I used excessive torque on the mounting screws. I only turned them until the well nuts were compressed a bit. Snug, rather than until I couldn't turn them any more. I used a little blue Loctite to ensure the screws wouldn't loosen over time.

What's weird is that the left side mounting holes are pristine. You'd think that if I had tightened the screws too much, those holes would have cracks too.

FWIW, the windshield only has 4 holes. The Madstad bracket provides places for up to 8 well nuts, and the previous Givi windshield used 6 of them.

I have a California Scientific windshield and 6 new well nuts on the way. I really don't want it to start cracking after install like the PWD did.

Last edited by DesertBike; 11-18-2017 at 01:34 PM.
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post #2 of 23 Old 11-18-2017, 02:14 PM
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Only over tightening will do that.

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post #3 of 23 Old 11-18-2017, 02:25 PM
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Vibration will too, especially if the fastener is too loose and the windshield is able to vibrate against the fastener. Tough to imagine that sort of vibration though on a V-Strom.

I saw some hits on Google regarding others who had cracking Givi windshields; maybe they can shed some light on it for you.
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post #4 of 23 Old 11-18-2017, 02:31 PM
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Have patched,cut to fit,and cut out large parts of new and old shields over the years to run on work bikes in the cold times. If mine would take the smallest drill I can find and dril it end of each crack so it will not go any more. Then clear tape inside and sticker of your choice over the out side. If just mating two parts I use plastic with the self lock nuts like lic. plate ones.
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post #5 of 23 Old 11-18-2017, 02:36 PM
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Two of my six Harley's were sportster's. Both cracked the mid size shield at places around the head light even if not in touch with it. I drilled each crack and never got any worse. Body parts ,faring's made of plastic I do the same.Drill the end as soon as you see the crack.Then body work or sticker over it.
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post #6 of 23 Old 11-18-2017, 04:49 PM
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Was there supposed to be a rubber/plastic washer under the screw head? I just went out the garage to be sure and bothe the BMW G650GS and the Wee Strom have rubber/plastic washer guides under the retaining screws.
Yes, the captured nut is usually in rubber but the screws have those cushions too.
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post #7 of 23 Old 11-18-2017, 05:13 PM
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Quote:
Originally Posted by DesertBike View Post

What did I do wrong?
You used an acrylic windshield.

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post #8 of 23 Old 11-18-2017, 05:13 PM
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The well nuts already have a rubber disc the screen mounts against. There should be a plastic washer between the screw head and screen and one between the screen and bracket. If the hole has some breakage at the edge rather than being really clean, it can begin crack development.

Edit. I forgot about the rubber washer between screen and bracket.

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Last edited by greywolf; 11-18-2017 at 09:19 PM.
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post #9 of 23 Old 11-18-2017, 08:40 PM
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I wasn't going to chime in on this, but if what appears to be a rubber bumper on the madstad bracket right above the cracked mounting hole it puts a strain on the screen. You need a nylon washer the same height to keep the strain away.

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post #10 of 23 Old 11-18-2017, 09:25 PM
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I used to change screens often and had extra mounting hardware. I'd have the screw, a washer with a slip hole, the screen and a washer with an interference fit that would prevent the screw form coming off the screen so each screen would have four screws and eight washers mounted.
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Pat- 2007 DL650A was ridden to all 48 contiguous states. I didn't quite make it to 17,000 miles on the 2012 DL650A.
Nicknames I use to lessen typing, Vee = 2002-2012 DL1000s. Vee2=2014-2016 DL1000s. Wee = 2004-2011 DL650s. Glee = 2012-2016 DL650s
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Please vote in the poll on what Strom(s) you have at https://www.stromtrooper.com/informat...-you-have.html
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