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What size valve stem. Tube or no tube.

  • Thread starter Thread starter Quick Cal
  • Start date Start date
Q

Quick Cal

Guest
I went to have my new tire's mounted at a friend's house, but he didn't have the right size valve stem's. What size do I need for my 650's 17/19 wheel's.

The PO said when he had tire's put on they wouldn't hold air. So he had tube's put in. But I'm thinking I probably shouldn't run tube's in my new tubeless Avons. Unless they won't hold air either. I didn't see any issue's with the rim once I had the tire off.

Is good old rubber stems fine, or should I get some steel one's. Thanks.
 
I searched all over the web for this answer.
Closest I found to anything resembling information was "the guys at the tire shop will put new ones in"
I just cut the threaded in valve out of my front tube and installed with some sealant it as a stand alone tubeless type valve.
For the rear I reused the threaded in valve that was already in the rim.
The front tire had a tube, the rear did not.

I went tubeless front and back with the new tires and haven't had any issues at all.

Tank
 
If the rims state there tubeless rims go for it with steel valve stems. Other wise run tubes if the rims dont say there tubeless. Dont care what others say, enough sh#t out there trying to kill you without you trying aswell. And IF tubeless rims make sure you wire brush the valve/tire seating area clean. Any crap left there will make it leak.
 
I should specify that my rims both say 'tubeless' on them.
 
My 550 rims had 413 marked upon them so in wnet new 413s bought at a local autoshop.
A hard thing to get in oddly wnough
 
I have tubeless rims. I'll call around this morning and see what I can find.
 
All right. I came up with some steel stems. They are made by WPS. Part #85-0438. That part # may be for a big package of them I think. I was just able to buy 2 out of the pack, $5.29 each.

Now for a question. The skinniest part of the inner rubber seal is 3mm larger than the hole in my rim. The guy at the shop said to just drill out my rim. I DON'T THINK SO. :eek: I was thinking maybe it's supposed to be a little bigger so it will get pulled in tight into the hole when you tighten the nut up from the outside. Should I maybe try to put a little bevel on it to help guide it in. Or maybe even better, I could use a countersink bit on the hole in the rim. Or am I over thinking stuff again. :-\\\ Should I just not worry about it. What do you guy's think. Will it pull in, or do I have the wrong stem. Thanks.


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Get ure stanley knife out and cut the first section off. Simply. Then install the stem and not sure what ure running but any other seal goes on outside before the cupped washer and TWO 12mm nuts. If no 2nd rubber dont worry. But u need the washer and 2 nuts using the 2nd one as a lock nut. If no cupped washer or spare nuts steal from a old tube. In the supplied pic thats the standard setup on any jap bike from that period motorcycle. (execpt for Honda Comstar wheels) Varies with none genuine valve stems. Just good firm tightness is required to seal. Spray with soapy water at the seam and tyre/rim area for any bubbles when inflated. When done go back to the shop and remind ureself never talk to that idiot again.

On another note install stem and take any balance weight from the wheels and try and balance the wheel to see where the heavy spot is. Mount the dot on the tyre on that spot as a lot of times the valve stem area isnt the heaviest part. You will end up using less weight. And try and use a steel vavle cap with rubber inside it as in theory at 60mph there is enough centertrifical force to unseat the valve stem and let air escape. (IN THEORY)
 
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Jesus people this is a major safety issue
either buy the OEM or go to a reputable source

I looked on a few other sites and 11.3 mm is apparently the Japan inc. standard for tubeless applications.
The 413 should be a direct fit.

You can order the OEM parts they are like 5 bucks or so apiece

Drill you rims?? Man that was a class A moron there I tell you what.
 
no affiliation to this guy, just something I found, wish I ordered before I got my new tires mounted...

in case someone wants to get in touch with the guy see this link

http://www.ninjette.org/forums/showthread.php?t=108277&highlight=valve+stem



ALL_113.jpg

From your favorite local vendor; 90 Degree Drop Forged Aluminum Angled Tire Valve Stems in various colors...

Available in:

-Black
-Red
-Silver
-Gold
-Blue


Available in both 11.3mm and 8.3mm


For our bikes and most Japanese bikes you will need the 11.3mm but if you have Carrozzeria, Galespeed, OZ, Marchesini, Marvic and BST wheels you will need the 8.3mm ones.

These are the same valve stems which come from the factory on the fancy italian bikes (Ducati, Aprillia, etc) and many MotoGP, WSBK, Moto2 teams use these valve stems.

Generally race teams like to run a different color valve stem than the wheel so that they can easily spot the valve stem.

They are made in Italy and are the same valves which are sold under the Ariete brand for much more.


What they do?

-Easier to check pressure and fill tires (specially on the front)
-Lighter than rubber stems - they weigh in at 11 grams each
-They are reusable, no need to replace them like rubber valves with each tire change
-Fixed to the wheel with a locking nut, can't bend, or be expelled from the wheel
-The angled quill reduces the effect of centrifugal force, which tends to fling the valve core outwards in a conventional valve, leading to loss of pressure in tires.


Installation

Torque the locking nut to 7-10 Nm


How much?

$22.05 shipped for the pair! (USA & Canada)

add $3 for international shipping outside of USA & Canada


How to purchase?

Use the specific buy now button that corresponds to the size/color of the stem you would like.


Typical delivery times are around 4 to 10 business days.


Simple payment, just use the BUY NOW button below to purchase your set!



11.3mm Black - Pair

BLACK_113.jpg






---------------------------------------------------

11.3mm Silver - Pair

SILVER_112.jpg






---------------------------------------------------

11.3mm Gold - Pair

GOLD_113.jpg






---------------------------------------------------

11.3mm Red - Pair

RED_113.jpg






---------------------------------------------------

11.3mm Blue - Pair

BLUE_112.jpg
Click to expand...
 
Here's a pic of what I'm working with. No double nut, but I will steel one from the inner tube. Also, I have the smaller diameter hole in my rim's. I went the the dealer and got 2 stem's. Got home and they are too big.

So I called the company that makes the stem. They said as far as the inner rubber goes,, just spit on it, and it'll go in,,,,lol. :-\\\ I've heard that somewhere before. :D

So tell me if this makes sense to you guy's. The PO all ready said the rim's wouldn't hold air on their own when he had new tire's put on, so he tubed them. Now who really knows why. So maybe the factory set up was a little less than perfect on these rim's. Who knows.

I went ahead and installed the stem as is. It went in fine. About half of the smaller part did in fact get drawn into the hole. You can see it in the pic. Wouldn't it make sense that this would be another sealing point as well as the bigger flat surface. Just thinkin. I'm going to run it buy my tire guy and see what he says also.

I'm thinking I'm going for it as is,,,,unless of course you guy's say,,"Hey fool, you will die". :rolleyes:

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Lots of, um, strange information here... :eek:

With that type of metal valve stem and an 8.3mm hole as found on most GS models (and most motorcycles with OEM metal valve stems on tubeless wheels), you discard the stepped seal and use the flat one on the inside.

Rubber valve stems as found on newer bikes are usually 412, although 413 will work fine -- the only difference is that the 413 is much more common (you can buy 'em in Walmart, ferpetessake) and 1/4" longer. Rubber valve stems and the larger diameter metal valve stems found on most cars use a larger hole -- about 11mm, IIRC.

There is NO reason to drill a larger hole in a motorcycle rim, even if you're converting a tubed rim to tubeless.
 
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Go to NAPA Auto Parts and get their "Motorcycle Valve Stem" for about $4.

Works like a champ.
 
bwringer said:
Lots of, um, strange information here... :eek:

With that type of metal valve stem and an 8.3mm hole as found on most GS models (and most motorcycles with OEM metal valve stems on tubeless wheels), you discard the stepped seal and use the flat one on the inside.

Rubber valve stems as found on newer bikes are usually 412, although 413 will work fine -- the only difference is that the 413 is much more common (you can buy 'em in Walmart, ferpetessake) and 1/4" longer. Rubber valve stems and the larger diameter metal valve stems found on most cars use a larger hole -- about 11mm, IIRC.

There is NO reason to drill a larger hole in a motorcycle rim, even if you're converting a tubed rim to tubeless.
Click to expand...


I am gonna go out on a limb and say you are wrong.
Most stems are 11.3 or .45 something inches.
 
Odd the most oft quoted size of an post 83 tubeless is 11,3

Its perverse. Of the purveyors of aftermarket anodized stuff the agreement is 11.3 with only rare wheels being the smaller size.

I do know the zedder cross ref has an inordinate number of bikes with the 413 stems
 
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