Valve Stem Cap

sikatri

Well-Known Member
Local time
Yesterday, 23:39
Joined
May 25, 2019
Messages
1,082
Points
122
Age
61
Location
Houston
My Ride
2005 Triumph Thruxton 900
I was doing my pre-ride check and after putting a few lbs of air in the rear tire I screwed on the valve stem cap. As I was getting it tight I heard a “psssst” sound on the last turn before it bottomed out. Tried it again several times and the same result. The front doesn’t do it. I looked at the stem cap and it looks a bit different inside like there was something in there.6DC6D721-467F-4367-8C2A-DEF997DFFA20.jpeg
I backed it out a bit, but I’m afraid it might come off sometime. Is it time for a new cap or see if a small o-ring would work?
 

RockyDS

Active Member
Riding for 51 Years
Local time
Yesterday, 22:39
Joined
Oct 26, 2019
Messages
180
Points
42
Age
66
Location
Rocky Mountains, Canada
My Ride
dualsport/adventure
I think there was likely a seal or o-ring in there that's been lost.
 

Rocky

Still Rocking
Riding for 29 Years
Administrator
Staff
Local time
Today, 01:39
Joined
Jan 28, 2006
Messages
19,666
Points
893
Age
83
Location
Halifax
First Name
Rocky
My Ride
2006 T100 Bonneville
Unless it's some sort of "special" cap I would toss it and get some new ones. They're pretty cheap so why bother with a defective one.
They probably come is a small blister pack and it's always good to have spares.
 

sikatri

Well-Known Member
Local time
Yesterday, 23:39
Joined
May 25, 2019
Messages
1,082
Points
122
Age
61
Location
Houston
My Ride
2005 Triumph Thruxton 900
It appears to be a custom Union Jack one. Not original, but cute. I may look for an o-ring.
 

RockyDS

Active Member
Riding for 51 Years
Local time
Yesterday, 22:39
Joined
Oct 26, 2019
Messages
180
Points
42
Age
66
Location
Rocky Mountains, Canada
My Ride
dualsport/adventure
Failing that, you could just squeeze some silicone sealant down the end and smooth it down to make your own seal. That would allow the cap to tighten down. It's only a dust cap, not an air seal after all. Make sure the sealant dries before screwing it on though - you wouldn't want it to get stuck on.
 

sikatri

Well-Known Member
Local time
Yesterday, 23:39
Joined
May 25, 2019
Messages
1,082
Points
122
Age
61
Location
Houston
My Ride
2005 Triumph Thruxton 900
O-rings worked. No sound of valve being pressed and air leaking. Snug too.
C90DB146-824F-4EC6-92A6-C28601A37E1B.jpeg45D9C8A5-134A-459E-BEAC-A65CE284FD41.jpeg
 

Rocky

Still Rocking
Riding for 29 Years
Administrator
Staff
Local time
Today, 01:39
Joined
Jan 28, 2006
Messages
19,666
Points
893
Age
83
Location
Halifax
First Name
Rocky
My Ride
2006 T100 Bonneville
Great that it worked TUP
 
Premium

Support TriumphTalk by becoming a Premium Member.

 What You Get

Donate

 

 

Search

Top Bottom