Ducati Monster Forum

Moto Board => Tech => Topic started by: Gimpy on June 19, 2011, 04:51:50 PM

Title: Do I need to replace my vlave stems with everynew tire?
Post by: Gimpy on June 19, 2011, 04:51:50 PM
So I finally bit the bullet and went in with a few friends on a tire changer.  I have a new tire on the way, so while I wait, I figured I would learn how to use the thing.  Getting the tire on and off seems to be pretty straight forward.  At least the videos seem to make it look easy enough.  But I have run across a few posts (not on here) that say you should change your valve stems.  Changing the valve stems isn't in any of the videos......

Is this something I need to do?  Does this apply to tubeless motorcycle tires? If it is needed, any advice? 
Title: Re: Do I need to replace my vlave stems with everynew tire?
Post by: Howie on June 19, 2011, 05:09:46 PM
Common wisdom is you should, probably based on cars that get 40K plus on a set of tires and have rubber valve stems.  I don't change mine.
Title: Re: Do I need to replace my vlave stems with everynew tire?
Post by: ducpainter on June 19, 2011, 05:10:53 PM
^^^^^

+1

metal stems are rarely replaced.
Title: Re: Do I need to replace my vlave stems with everynew tire?
Post by: DarkStaR on June 19, 2011, 05:13:33 PM
I like 90* valve stems. 
Title: Re: Do I need to replace my vlave stems with everynew tire?
Post by: Speeddog on June 19, 2011, 05:59:52 PM
I've not seen one on a Duc that legitimately needed replacing due to leakage.

Quote from: DarkStaR on June 19, 2011, 05:13:33 PM
I like 90* valve stems. 

+1.
Title: Re: Do I need to replace my vlave stems with everynew tire?
Post by: ducatiz on June 19, 2011, 06:01:34 PM
the only time i change mine is the first time i do the tires and put on 90deg stems for older ones that didn't come with it.  other than that, no need.  the metal stem seals far better than the rubber ones ever will.
Title: Re: Do I need to replace my vlave stems with everynew tire?
Post by: Cloner on June 20, 2011, 10:32:12 AM
Agreed.  The 90° stems are the business!  I often replace valve cores, but never metal stems.
Title: Re: Do I need to replace my vlave stems with everynew tire?
Post by: bikepilot on June 20, 2011, 12:03:31 PM
I usually put in new rubber ones every change, but don't change metal ones unless they are crusty, leaking or otherwise disconcerting.

So far I've always used straight valve stems, they work fine for me.