I did look this up on Youtube and found a couple informative, quick vids on removing and installing a standard rubber air valve stem from/into a rim.

Is it really as easy as slicing through the stem to remove it?? I was thinking of just slicing it here with a sharp chisel.

Here is the plug portion of the stem inside the rim. Cut the stem and both inside and outside should pull right out, no?

Is it accurate that all that need be done is to pull the new stem through the rim and it seals under its own snugness?

I have a set of these that I am going to try. Easy to install. Hope they don't leak. Would be a PITA to have to tear a tire off a second time to replace a bad valve stem.

* Last updated by: Rook on 12/28/2012 @ 3:37 PM *

Very easy to do just snip the valve stem with a pair of wire cutters, then take a philips screwdriver and poke it through the whole to push the bottom out. Install your 90* valve stems with red loctite surely don't want them coming loose. I installed mine facing the right side of the bike so I can check the air easier when it's on the side stand.

I'm running angled valve stems on the 14 and the 600. I will put them on every bike I ever own!

I'm interested to know if they require a little more weight on the opposite side of the rim to balance.

That's still going to depend on your tire. One of my wheels required no weights with them on.

Thanks guys. Good pointers!

I balance the bare rim before spooning on the tire. Trick I learned from Lytnin'.

I balance the bare rim before spooning on the tire. Trick I learned from Lytnin'.

http://www.clarity.net/adam/tire-changing.html

I was hoping Lytnin would post. He is the resident tire change expert. I get feedback from him every time I post a tire question.

I have the same angled valve stems you show above...no problems with them so far. Much easier to access with my air chuck.

thanks, kb. I'm really glad to hear they do not leak. The o-ring seal on them does not look like it is exposed much from the chamfer it sits in.

I have decided to use blue locktight just in case I need to tighten the nut a bit later on (if they should leak). They are made of aluminum so I don't want to go crazy torquing on them. If one should come loose, I imagine it would leak slow at first. Another thought: I have never had a valve stem cap come off. I have lost them when I removed them but never had one work itself loose and I don't screw them on very tight either. I doubt the nut that retains the stem is gonna come loose if it is tight and has some locktight on it. I'm saving the red for when I know I want to keep them and have them set up exactly the way I want. I guess heat can be used to soften red locktight if necessary.

Have the Bridgeport stem installed on the rear wheel. Boy, thought I had stems for the wrong bike cuz they did not seem to fit. The threads on the stem were no long enough to allow the nut to thread on far enough to contact the surface it seats on. I turned the nut over so the lip faces inward of the tire. That worked. I was able to tighten it down. If you look at the pic above of the Bridgeports in my hand. The nut is threaded on the wrong way with the lip facing in toward the surface it seats on. That lip takes up the last few threads which are needed to tighten the nut/rim/stem together and seal the o-ring.

I will show a pic of what I am talking about in case anyone reads this and needs clarification.

Side note:
with the Bridgeport on the rim and no wheel weights, the rim is perfectly balanced. No particular heavy spot on my balancer.

* Last updated by: Rook on 9/27/2012 @ 6:49 PM *

Here is the Bridgeport installed.

This is the valve fastened at the internal surface of the rim. As you can see, there is a ridge above the threads of the nut that looks like some sort of spacer. The valve stems came with the nut threaded on with the ridge facing the bottom of the valve stem. It would not tighten up on the rim in that way but works fine with the ridge facing away from the bottom of the valve stem.

* Last updated by: Rook on 12/28/2012 @ 3:38 PM *

Damn, trying to decide between red or black on my murdered-out bike...lever switches and brake line ends are red, everything else black...red valve stems will definitely pop out on my black wheels, think I'm leaning towards those. Any suggestions?

And what size fit the 14?

* Last updated by: runr2940 on 10/1/2012 @ 1:19 PM *

Ho RED!! If you order Bridgeports, they will be sold according to the bike. You buy for the ZX-14, it will fit. Got my Bridgeports from Kurveygirl. Motomummy also has them.

Noticed they are called 90 degree on Kurveygirl and 85 degree on Motomummy. ThinkI would go with the 85 degree for just a slightly more convenient reach. ...or so it would seem. My 90 degree work fabulous however.

* Last updated by: Rook on 10/2/2012 @ 12:26 AM *

An update on my experience with these valve stems...

I started having leaking problems on the rear about a month after installing them. Changing the core seemed to help some (it still leaks infrequently). The front leaked out totally overnight last night while sitting in the garage...it had never leaked up to this point. Changed out the core, and it's still leaking. Dropped my front wheel off by the shop a few minutes ago to change back to the old, trusty rubber valve stem.

* Last updated by: kb377 on 12/28/2012 @ 12:02 PM *

What a freahgin DRAG, kb377! Far as I know, Mine are just fine.

Tell me something, did your 90 degreers have the raised ring molded to one side like the one I have in pics above?

Reason I ask is because maybe the Bridgeport you installed was not for a OEM ZX-14 rim.

I ordered a new set of gold Bridgeports for my Carros recently. They have a different nut than the Bridgeport I installed on my OEM rim.

CZ rim Brigeports

In any case, thanks for the heads up, kb. Seeems to me a conventional stem would seal better than one of these. If the gasket ever gets fatigued or the nut starts to come loose a bit air would escape. The conventional stems fit too tight to leak.

* Last updated by: Rook on 12/28/2012 @ 3:42 PM *

* Last updated by: Grn14 on 12/28/2012 @ 5:14 PM *

Rook,

From what I remember, they looked like the gold set pic'ed above. I didn't have any problem with them sealing on the rim, it was just the valve cores that are bad. Not sure if maybe I got a bad set (internal threads not machined correctly?).

Rook,
From what I remember, they looked like the gold set pic'ed above.

HUmmmm? The gold set above will not fit my Carrazerias from for which I purchased them. The threaded portion that goes through the rim is way to big for the hole. I guessI could file out the hole but not on my expensive rims...no way! Just so happens I have one Bridgeport in silver like the ones pictured way at the top. That seemed to fit the rim hole just fine. Looks like it could use an extra Oring on the bottom to seal the valve stem.

I sent Motomummy an email asking for an exchange. the golds will not fit but that other style I have just might (only prob, they are silver).

Funny thing, the other silver is the stem I have on my OEM ZX-14 rim. Works fine.

it is amazing how little these things compress the O-ring and still they seal against the rim.

I want to get a set for the zx-14, and put them in on my next tire change.

You are aware that they come in 2 sizes? 11.3mm for (most) Japanese wheels... and 8.3mm for (most) European/Italian wheels and Carrozzeria, Galespeed, OZ, Marchesini, Marvic and BST wheels...

There is a shallow well that the nut sits in on the inside of the rim. The OD of the socket I used just fits in there. If a bigger nut were meant to be in there, the socket required would not fit in the well...so I'm sure the B11 is the correct size.

I measured the threads with a calipers and the pic below shows what I came up with. The Carrozzeria threads are the same pitch and size as the B11 (that is the same thread as a valve cap, BTW).

* Last updated by: Rook on 1/1/2013 @ 7:21 AM *

This might get pretty confusing right about now. The Silver BP marked 7.6mm in the picture above is actually an 8.3mm (according to a Carrozzeria tech service guy (maybe my calipers is off?). That is the one that is in my OEM ZX-14 rim. It has B11 molded into the top of the valve as if that is the model# of that piece.

I do not have a tire off at this time otherwise I'd check how the B12 fits. I doubt very much the B12 would fit if the B11 does. The B12 is a lot bigger. ....all I can say for sure is that the B11 fit in my OEM rim and sealed just fine. Must be the right one.

incidentally, the B11 (8.3mm) is the right one for the CZ as well...just verified by a CZ tech. you need to use the CZ internal gasket off the CZ valve stem to make it seal on a CZ rim. No special installation fot the 14's OEM rim. Ii stalled just fine and sealed as long as the flat side of the nut tightens against the rim.

* Last updated by: Rook on 1/3/2013 @ 12:41 AM *

The Silver BP marked 7.6mm in the picture above is actually an 8.3mm (according to a Carrozzeria tech service guy (maybe my calipers is off?).

I started having leaking problems on the rear about a month after installing them. Changing the core seemed to help some (it still leaks infrequently). The front leaked out totally overnight last night while sitting in the garage...it had never leaked up to this point. Changed out the core, and it's still leaking. Dropped my front wheel off by the shop a few minutes ago to change back to the old, trusty rubber valve stem

I didn't have any problem with them sealing on the rim, it was just the valve cores that are bad. Not sure if maybe I got a bad set (internal threads not machined correctly?).

just checked my rear tire with Bridgeport valve stem. has lost about 20 psi over the 6 weeks of storage its been in. Doubt if that is all from cold weather.

hope it is the cores. If not, I will still install the others I have. If they leak, slowly, not a big problem. I will replace when i get tired of them. Hope they can be installed so as to not leak though. No reason a rubber washer gasket could not be installed on the stem inside the Kaw rim so it sealed internally like a CZ rim does.

* Last updated by: Rook on 1/9/2013 @ 2:41 PM *

Hopefully replacing the cores will fix 'em.

I had these same valve stems on the Marchesini's on my Ducati, never had any problems with leaking at all.

yes, well I am not ruling out the the tire yet. It was the second time it was put on the rim and it did not seem to go on easy. Maybe the tire bead. I will do some soapy water tests but with a leak this slow, I might not be able to detect it that easily.