There are many ways to gain access to the valve stems on the XII. The important take-away in this thread is that
it is incredibly easy to safely monitor your tire pressures using a TPMS System. They're very inexpensive (all things considered), available on e-Bay.
Link to a MC TPMS search,
$22.68, delivered to your doorstep!
A set of 90-degree valve stems help with air access. Another worthy investment in the tires for convenience in maintaining their pressure, keeping riders safe.
To be honest, I hate the OEM valve stems and wheel setups:
freakin' PITA! The TPMS System is a real labor saver. Its warning alarms have saved us, more than once. Got my original for <$60, and the replacement for <$40. Sensor batteries died after two years, I damaged one sensor trying to open it to replace the lithium watch battery. Easier to order a replacement system than to order a new sensor, so I just got the complete (updated) package. Each replacement battery cost me >$5, so two new batteries is >$10, and that is 1/4 the cost of an entire, new system! I ended up buying a C-spring clip pliers to unscrew the sensor cap to get at the batteries, which was a $20 tool! Hardly worth replacing the sensor batteries, to be honest...
I now have a back-up Receiver/Monitor, which can be paired with the new sensors, if needed. Both monitors charge via USB; both are very similar in settings; both connect using similar mounting hardware. Now that I have the special pliers needed, and I have two sets of Receivers/Monitors, I will just replace the batteries, unless I break another sensor in the process of replacing the battery.
![Ten :perfect10:](./images/smilies/perfect10.gif)
A TPMS System is one of the greatest safety, and convenience, investments you can make, on any motorcycle.
Cheers!