10-12-15, 09:26 PM
I have a set of them on my tuono v4. To be honest they are pretty crap. The parts that tighten with the allen bolts for adjusting need serated washers fitted, so when you tighten them they actually stay in the correct position. The problem with these mirrors is that they have a smooth surface and once fully tightened they still move and the other thing is the allen bolts are made of cheese, so you can't overtighten them. I fitted serated washers and used stainless allen bolts and they work fine now. 
If it's broken, it's not fixed.