Hello everybody A small piece of information for those wanting to install a TPMS. I have just installed mine, which is this one. The rear sensor is well clear of the caliper. Just screw it on and you're done. For the front one, you need to rotate the angled valve inwards so the sensor cap doesn't hit the front caliper. You don't need to get the wheel/tire off to do that. Install the sensor cap and slowly but steadily apply some force with your hand to rotate the valve inwards. Give another 2-3 mm of clearance from the point you think is enough. Rotate the wheel to make sure it moves freely and you're done. You'll see that you will still have more than enough room when you need to fill the tires. I haven't changed anything on the bike, so this info applies to the original calipers on the MTS. No idea if an upgraded caliper requires more rotation for the valve.
I've gone for the ones which speak to my garmin. Yet to install them but welcome a warning system of a deflating tire then potentially getting into trouble at speed.
If you already have a garmin, yes, that would be the preferred choice. TP-90 is very small and discreet though. Looks like a very nice set-up system. Pressures are exactly the same as those reported by my compressor pressure dial. I've yet to do a long trip with this but I'm very curious as to how the pressure/temperature of the tires change. Will report it sometime in the future.
This is a bad idea. The valve is held in place with a locknut tightened inside the tyre, and there is also a seal. Sure you can twist it round by main force despite the locknut, but this is bad practice. There is a risk of damaging the wheel, the valve, and/or the seal, or of damaging or loosening the locknut. I would advise against it.
This is why I said "slowly but steadily". The rotation angle is not big enough to damage the seals. Ideally it should be done when you change the tires. It's as if you tighten the nut for 30 degrees more (1/12 of the turn).
Well OK, that's your choice. Each person who wants to fit a TPMS can decide for themselves whether to twist the tight valve assembly as you suggest, or wait until the next time the tyre is off the wheel.