I fitted a PCV to my XT660 Tenere today and thought I'd share some tips with you.

The instructions say that you have to remove the tank to connect all of the cables. I didn't want to go through with the faff of draining the tank, removing the hoses/connectors, etc. I managed to do all of the job without getting the tank off which was a result. A small bit of wood wedged under the rear of the tank allows it to be jacked up by a couple of inches and gives just enough space to get the job done.

All of the connectors are locking so have a look at the connectors on the PCV loop to work out how to unlock them. You'll need a small screwdriver and a bit of perseverance.

The instructions also recommend that you fit the PCV unit to the rear of the bike under the seat. The loop on mine wasn't anything like as long as that so it wasn't an option. I nearly placed it on the flat area in front of the airbox but then spotted that it wedges perfectly with an interference fit into the space where the toolkit should fit. It's a clean fit and doesn't contact the seat at all.

Another note is that if you feed the PCV connectors through the thin, top end of the rubber boot that covers the original connectors you can side the boot back down and cover them again. I found that unbolting the rear brake reservoir gave much better access to that area too.

I hope those tips might save you some time.