Someone PLEASE tell me how and why this is happening - Kawasaki KLR 650 Forum
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post #1 of 9 Old 04-09-2019, 06:40 AM Thread Starter
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Someone PLEASE tell me how and why this is happening

I haven't had tube tires since my 1974 Honda 350Four back in the early 80's. I had no trouble with those tires that I can recall. I have had nothnig BUT trouble with my rear tire (2014 KLR). I had a slow leak over the winter and attributed it to not riding as much and the change in temps. About Feb I start riding again (South Carolina). One day after work I'm going down the road and my rear tire feels funny. I look down and it's almost flat. Luckily I had some CO2. I get home and fill it up nice and tight. Next day I ride someplace short and again tire starts running low. Figure I have a hole in the tube cause I filled it up that night and next day, totally flat.

I take the tire to the dealer since I'm sick of changing tires and this mitas was a complete beach. I get the tire back, take a 6 hour journey with no issues. Again next time I drive to work I come out and it's low. Brand new tube because I had the dealer give me the last one so I could cut it open and see why the green slime did nothing. Well that tube I blew up a taught and stuck in some water and no bubble. It's still holding air. I don't understand.

Why are these tubes losing air! I've decided that I'm going to try the marine adhesive tubeless tire conversion cause I just don't trust tubes any longer.
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post #2 of 9 Old 04-09-2019, 08:30 AM
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Valve stem core loose?
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post #3 of 9 Old 04-09-2019, 08:44 AM
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Tubes only lose air at the level your experiencing if they have a hole in them or if they have a bad valve core. My family used to operate a mobile bicycle repair business and we saw cores that were bad. However, two tubes in a row? I'm betting there's a burr inside the rim or something stuck through the tire that's causing a hole. Since you had a dealer do the last tube install it's on them and I'm sure they'll take care of you.

On your bubble test of the old tube, since you put sealant in there all bets are off on what that tube can tell you about the source of the problem. That the tube lost air before removal and not after removal is case in point. I personally don't like that stuff because it masks a problem and gums the valves eventually to the point that they no longer work...then how does one put air in a low or flat tire?
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post #4 of 9 Old 04-09-2019, 09:32 AM
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I'll have to bet on the problem being with the valve cores also.

If you inflate the old tube to about 1 & 1/2 times normal cross-section it should expand any puncture that the Slime might have sealed and you should be able to find a hole if a hole exists.

If you find a hole, then you can hold the tube next to the tire & wheel with valve stems aligned and check the 2 different possible alignments for location of offending object in tire,

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post #5 of 9 Old 04-09-2019, 09:34 AM Thread Starter
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Quote:
Originally Posted by pdwestman View Post
I'll have to bet on the problem being with the valve cores also.

If you inflate the old tube to about 1 & 1/2 times normal cross-section it should expand any puncture that the Slime might have sealed and you should be able to find a hole if a hole exists.

If you find a hole, then you can hold the tube next to the tire & wheel with valve stems aligned and check the 2 different possible alignments for location of offending object in tire,
I'll try that. But two bad tubes in a row? What are the odds.
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post #6 of 9 Old 04-09-2019, 09:57 AM
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Quote:
Originally Posted by Bill10 View Post
However, two tubes in a row? I'm betting there's a burr inside the rim or something stuck through the tire that's causing a hole.
That's my thought too. check the rim strip and spoke nipples too.


There is no reason why a quality tube (I use only rubber) shouldn't work perfectly and hold air well. Only after sitting for 6-7 months do I usually have to top them up.

IMO, tube-less is a step backwards on a dual sport; it may make simple repairs easier.....as long as the tire hasn't come off the bead; if it has, you're in big trouble as getting it to seat without a high-volume air supply is extremely difficult IMO.

I'm converting my KLR's to Tubliss's system which IMO, is the best of both worlds, but it requires new 18" rear rims and isn't strictly rated for highway use.

Tubes aren't an issue if you use good ones and have a good tire/tube change technique and some decent tire irons......it does take patience and practice though.

2 cents,
Dave
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post #7 of 9 Old 04-09-2019, 10:08 AM Thread Starter
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Rear tires on a KLR have a safety bead so tubeless should be find and unless you bash it on a giant rock it should be fine. I'm not going to do heavy single track stuff, just dirt roads and gravel mostly. I like to travel long distances so flat tires are not fun.
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post #8 of 9 Old 04-09-2019, 12:43 PM
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Quote:
Originally Posted by patroy75 View Post
Rear tires on a KLR have a safety bead so tubeless should be find and unless you bash it on a giant rock it should be fine. I'm not going to do heavy single track stuff, just dirt roads and gravel mostly. I like to travel long distances so flat tires are not fun.
Best of luck


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post #9 of 9 Old 04-09-2019, 08:05 PM
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Sometimes, without rim locks, acceleration or braking results in yanking the valve stem from the tube . . . different degrees of severity may exist for this tire/tube malfunction.

“You better put down that gun. You got two ways to go, put it down or use it. Even if you tie me, you’re gonna be dead.” "John Russell" (Paul Newman), Hombre
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