So something like this? Says its a TR15 to TR13 adapter.





Thanks for the info. I like the progressive method you mentioned. This is not a cheap upgrade, but a worthy one, I feel.

 

I'm having the same issue on my 15 CVO, hit the ignition switch and the warning pops up on my GTS, low pressure 33 front 34 rear, I have added air to 36/40 it holds a few days but then reappears, going to try what was suggested with letting some air out and re filling.

 

What is your actual pressure when you turn it on first time of the day (by a Tire Gauge, not the TPMS)? Reason I ask, I was getting ready for a week long trip, and was going over the bike out. Turned the ignition on and tire pressures were showing 37/39, so I wanted to bump them up a hair, to 40/42 ("cold" at 86 degrees). Checked them with my gauge that has been spot on with the sensors, and they were showing 39/41 so I just bumped them both up a pound. Turned the ignition back on, still showing 37/39.... went around the block and they updated to 40/42. Soooooo, I'd guess somewhere over night they "updated" and that was where the 37/39 came from and they hadn't updated again until the bike moved some, and woke up the sensors.

I watched a video on YouTube a while back, Doc Harley and he explains some things about the TPMS system, I don't know how spot on his information is, but certainly worth considering.
at about the 1:40 he talks about the different "modes".

According to him, when moving the sensor is in "Drive Mode" and the system is updating every 64 seconds, but after 7 minutes of being parked/still the sensors go into "Park Mode" and only updates every 4 hours... to prolong battery life. To "wake" it up or get back into "Drive Mode" so it updates, you have to drive the bike 25mph or faster for 20 seconds or more... then it "wakes up" and updates.

I do not know if it has anything to do with what you guys are experiencing, just thought I'd throw that out there incase it has some bearing on it.

 

Could be, if the ID is 8mm to fit snugly on the HD valve stem and the OD is 11mm so when its slid into in the 11.4mm hole in the rim, and you slide the stem thru it everything is snug.
Its all in that other thread.

 

I have been reading the other thread, but haven't seen s link or the info you've given. Thanks

 

Starting at post 159, on Page 16 of that thread

 

was at Sturgis also, was a great time. the TPMS do not seem to read accurate, at proper psi cold they both read about 6psi higher than the gauge but I know that and so can tell if the pressures are correct by doing the subtraction.

 

I did check the TPMS to a known good gauge - dead-nuts accurate on pressure.

Let five pounds out, pumped up to cold psi, no more issues. Thanks for that!

 

Actually heading to the Black Hills lol 10 hours on the road today at 70-80 and a bit warm… so I learned mine goes to “Hi” at 51psi, and then while fueling up the tire cools some and once it comes back down to 50psi or below everything is good again. I caused this because I knew I’d be overnighting in places where starting out it’ll be in the low 60s-F, so I bumped my tires up a couple pounds. I would imagine if I’d just took 3psi out it would knock out the high warning, and once the fires cool all the way down at night, they’d still be good… so far I haven’t had it get “hung up” so to speak.

what you don’t want to do is freak out when you get a “hi” message and let air out until you’re close to 40psi… cause when that cools it’s really gonna be low. I’ve ran internal sensors for awhile now (previously an aftermarket system) and these psi after heating up a tire are not unusual… although I got a little too aggressive…

 

did you “wake” them by going at least 25mph for at least 20 seconds before checking them. They go into Park mode after sitting for at least 7 minutes. So when 6ou first turn the ignition on, that reading could be 4 hours old.