|
Post by rosiemoto on Oct 21, 2015 21:50:36 GMT -6
I've had a problem for months with my rear tire where sometimes every morning it's flat, or sometimes it'll hold air perfectly fine all week and stay exactly where I put it. The common thing is I check my air every day, and sometimes after pumping the air I'll have to let some out from overfilling... well, once while I was letting air out quickly, the valve stem core got stuck and it kept hissing and letting air out when I wasn't even touching it anymore. (I'm assuming that's called the core.) I had to push the core in again with the little air-letter-outter on my air gauge and it popped itself back into place I guess. I'm guessing it would do it again if I let air out that quick again, but I usually let it out slowly. This makes me wonder about the valve stem core being the cause of my mysterious random flat tire. I'm thinking since I check my air almost every day, maybe sometimes the core is sticking slightly from me simply checking it, and other times not... maybe depending how I push it or something? I've tried parking with the stem at the top of the wheel, and again at the bottom, and again on the center stand so there's no pressure on the wheel... it doesn't seem to make any difference; each way it has gotten a flat tire. History with the tire is: new valve stem was put in when I got the rear tire replaced. Slime was put in shortly after to fix a leak. It held air fine for a while, then this "random" flat tire started happening. I think I might be on the right track here. If it's the valve core, could taking that out with a valve core tool and putting it back in fix it? Possibly the shop didn't tighten it enough or something when doing the slime? (You wouldn't believe they've left me with unscrewed bolts, broken faring tabs, unhooked wires, etc, after working on stuff, many times) Thank you!
|
|
|
Post by cyborg on Oct 21, 2015 22:06:09 GMT -6
The core could be bad,,,any tire shop will change it for you,,,most will not even charge you for such a small request,,,,,throw whoever helps you a five spot and he will love you long time now
|
|
|
Post by Alleyoop on Oct 22, 2015 10:17:15 GMT -6
CYBORG AHHHH, little bit of FULL METAL JACKET I see You can go to any auto store and buy the cores for the valve stems, they screw in so yours maybe even just needs to be screwed in all way. So first see if the core is not screwed in all the way so that the o-ring is not seated and it leaks. Alleyoop
|
|
|
Post by mike932 on Oct 22, 2015 20:11:47 GMT -6
Windex works great to find a leak. Inflate the tire, then spray the whole valve with windex. If there is a leak, the windex will keep making small bubbles. Sometime air will leak from valve core. Sometime air will leak at the base of the stem which means you should tighten the stem nut with a wrench. Show us a photo of your stem.
If there is no leak, spray the entire tire to check for leaks.
|
|
|
Post by rosiemoto on Oct 23, 2015 15:23:48 GMT -6
Hi, here's a picture of the stem my tires use. I'll check by a tire shop and ask if they could re-screw mine in and see if it fixes it. Thank you for the tips! As I look at my tires, and it shows a little in the picture, they've both collected tons of oil on the rims and front brake disc over the years... I'm sure it's probably enough to affect my brake power so I wanna clean it. Can I just spray some brake cleaner all over the rims and inside the brakes without taking anything off?
|
|
|
Post by mike932 on Oct 23, 2015 16:03:50 GMT -6
That type of valve does not use a lock nut. It is just pushed into the rim. I predict there is leakage where the valve comes out of the rim. Spray the whole stem with windex and see if it causes a series of small bubbles. And stop using slime in your tire. It just makes a mess and acts as a temporary band aid. Please show us a photo of the tire that is leaking air. If it is time for a new tire, it is the perfect time to get a new valve. Order one of these to keep in your toolbox...... scooter valve on ebay
|
|
Scooter Doc
Currently Offline
Vstar 650 Classic
Posts: 675
Likes: 3
Joined: Apr 24, 2010 19:43:21 GMT -6
|
Post by damin69 on Oct 23, 2015 18:13:47 GMT -6
|
|
|
Post by mike932 on Oct 23, 2015 18:17:57 GMT -6
The problem with those is that you cannot tighten them without taking the tire off.
|
|
|
Post by Alleyoop on Oct 23, 2015 18:25:24 GMT -6
You can tighten them without taking the tire off. Alleyoop
|
|
|
Post by mike932 on Oct 23, 2015 18:28:55 GMT -6
I tried that, Alleyoop. I ended up warping the tire and ruining it. But then, you are a much better mechanic than am I.
|
|