I purchased a set of Hepco-Becker crash bars for my V7-850 Centenario. Despite an expected delay until December, they arrived quick smart in early November. I checked that all the parts were there and read the installation instructions. I was a bit worried about having to remove the bottom engine support bar in case the frame/engine moved. But, in for a penny, in for a pound…
I followed the directions mostly. They said to remove the frame bolts on either side AND remove the engine support bar at the same time. I didn’t like that idea, so removed the frame bolts and attached the centre part of the crash bars first. Loosely tightened up the four bolts for the time being.
It became evident that the horn was in the way, so I removed it.
Now for the engine support bar. Undid the nut and tapped the bar out using the provided longer bar as a drift. It came our smoothly. Took the new bar out, placed the crash bar on and tapped the new bar through to the other side. No drama. Placed the other crash bar on and the nut. Easey-peasy.
Swung the crash bars up and attached them to the centre piece. At this stage, nothing was tightened.
Sat back and admired my skilfulness. Then tightened all the nuts and bolts. I relocated the horn to the crash bar; there was just enough free play in the two wire connectors.
My only complaint with the kit is the quality of the bolts. It requires the original nuts and washers to be reused. I found that the nuts would start OK but then bind up on the threads further along. Even with a dab of grease, brute force was required to tighten them.
Otherwise, I like the look of the bars. They are subtle and not garish.
Motoguzzimackers' Moto Guzzi Diaries 
Just needed a bigger hammer mate.