I was looking for a removeable windscreen for highway trips and cold weather riding on my 2009 ER6n. This Givi A660 seems to fill the bill. It mounts quickly with two handlebar clamps and removes just as easily, and it's tall enough to provide very good wind protection with little buffeting, at least at this height. I'm 6'2", and I can see over the screen when it is mounted as pictured. I tried it mounted lower at various angles, but get a head-level noisy wind blast unless it's this high.

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Great find!

Nice, I wondered if there wasn't a cruiser or standard windshield that would work on the ER. Have you had a chance to freeway test it yet?

I would love to compare that set up with mine! It looks so tall!
Any buffeting on your helmet when you're riding in a normal, upright position?

I've used it on the highway, and it works well. I mounted it tall because I am 6'2", and in this position, I can still easily see over the top of the screen, and I feel no buffeting and little additional noise, up to 80 mph (I haven't taken it faster than that). I think the curved top lip of the screen helps in this regard. I've used Givi screens on other bikes, and it is surprising that the two-point handlebar mount is so secure.