Ducati.ms - The Ultimate Ducati Forum banner
  • Hey Everyone! Enter your bike HERE to be a part of this months Bike of the Month Challenge!
1 - 10 of 10 Posts

·
Registered
Joined
·
386 Posts
Discussion Starter · #1 ·
800 miles on my 2012 Multistrada with no issue and then noted a slow leak in the rear tire, will lose 10 lbs of pressure overnight or after riding 4 hrs. No signs of a puncture, I do notice it's hard to put air in through the valve stem now. Is it possible the valve stem is defective and leaking, or am I missing a small puncture? Should I put ride-on in it, replace the valve stem, or should I take it in? I don't have the skills or interest in taking the tire off the rim myself.
 

·
Registered
Joined
·
408 Posts
You can remove and replace the valve core with a small tool you can get (or borrow) from Autozone). They can get sticky and allow slow leaks. Simple to do and doesn't require tire removal. If you have a centerstand or Pit Bull, put the bike up on it before letting the air out. If the new core holds air problem solved :)

You can also look for leaks by pouring water on the wheel as you turn it and look for bubbling. Again, a lot easier if you have a centersyand (or Pit Bull stand).

Dave
 

·
Registered
Joined
·
386 Posts
Discussion Starter · #3 ·
Thanks for the tip, I just did a soapy water test on the valve and it appears to have a slow leak :rolleyes: Hopefully that's it, a lot cheaper than a new tire. I'm off to autozone :think:
 

·
Registered
Joined
·
3,261 Posts
Ducatis use alum valve stems, the cores will strip if you look at them wrong. Having dealt with this a few times (I've tried replacing just the core which has never been successful). Too much torque when tightening they'll strip and leak, too little and they'll leak.

I know you don't want to hear it but my advice is to get a new valve stem dismount the tire and put new complete stem in. For me it's easy as I change my own tires.

Chris

800 miles on my 2012 Multistrada with no issue and then noted a slow leak in the rear tire, will lose 10 lbs of pressure overnight or after riding 4 hrs. No signs of a puncture, I do notice it's hard to put air in through the valve stem now. Is it possible the valve stem is defective and leaking, or am I missing a small puncture? Should I put ride-on in it, replace the valve stem, or should I take it in? I don't have the skills or interest in taking the tire off the rim myself.
 

·
Registered
Joined
·
545 Posts
Bad valve core (or loose). I've had them on two of the four Ducati's I've owned. Try tightening it first. If still leaking, replace it. You can buy them and the tool at any auto parts store. 5 minute fix, worked both times for me.
 

·
Registered
Joined
·
386 Posts
Discussion Starter · #6 ·
Update...well the valve core was leaky so I replaced it. Then guess what I found. A nail in my 800 mile rear tire :mad: So I plugged it with a stop & go and we'll see how stable that is :p
 

·
Registered
Joined
·
5,287 Posts
Update...well the valve core was leaky so I replaced it. Then guess what I found. A nail in my 800 mile rear tire :mad: So I plugged it with a stop & go and we'll see how stable that is :p

shoulda kept your mouth shut. the plug nazis will arrive soon. I've used that system for almost 15 years now on bikes and cars w/o issue. that's all I'll say.
 

·
Registered
Joined
·
3,261 Posts
nothing wrong with plugged tires. I've used a number of times. I even had a friend use a plugged tire for a track day (I'm not sure I'd do that)

shoulda kept your mouth shut. the plug nazis will arrive soon. I've used that system for almost 15 years now on bikes and cars w/o issue. that's all I'll say.
 

·
Registered
Joined
·
1,469 Posts
Valve cores are often cheap and nasty and can fail or get crap in the seal. I always carry a few extra and a removal tool. I bought some better than average auto stores ones.

Another point is that you should pick up a properly sealed valve cap. There are many blinged ones available for cosmetic purposes that have no seal in them at all. Look for some with a proper flexible gasket or o-ring inside the cap. These will seal the air in even if the valve is faulty or has a bit of grit in it.

Just an extra level of safety.
 

·
Registered
Joined
·
131 Posts
A patch plug maybe, but I don't think I'd be able to do a track day with that little Stop and Go mushroom plug between me and a blow out. There's enough going thru one's head already without worring about tires IMHO.
 
1 - 10 of 10 Posts
Top