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post #1 of 5 Old Aug 30th, 2008, 10:31 am Thread Starter
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Leaky rear wheel?

The rear tire on my 2007 LT has lost air pretty much since new. It was only a couple of pounds a week at first and increased to about 4 psi per week as the tire neared replacement condition. I figured it was the tire or valve stem so I thought the new tire and stem would cure the problem. No such luck. I just checked the new tire after about a week and it has dropped from 48 to 44. My front tire holds air just fine. It will be down 1 psi in a month.

Has anyone else had this problem? I'm suspecting now a porous wheel, as I know this sometimes happens with cast alloy wheels.

2017 KLR650 "Mule"
2007 K1200LT "Starship Enterprise", VOICE II, Navigator V, Motorrad Communicator
1987 Kawasaki Voyager XII
1976 Kawasaki KH400
1973 Kawasaki 100 G5
1970 Rockford Chibi (the orange one)

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post #2 of 5 Old Aug 30th, 2008, 11:22 am
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Re: Leaky rear wheel?

Mine only loses that much over ~4 weeks so you are correct that something is awry.

Check the valve stem core to make sure it's tight. I've had new stems with the core loose. A good cap is also important since the centrifugal force tries to pull the stem open (hopefully you don't have one of those goofy red/green pressure monitor caps. They're all-around bad news).

If your bike weren't so new I might suggest there could some rubber and tire lube build up in the bead area of the wheel. This should be cleaned with a scotchbrite pad whenever the tire is replaced to ensure a good seal. But unless you've already gone thru several tires on your 07, this is unlikely to be be the culprit.

If you have a big enough tub, maybe remove the wheel and submerge it in water. Look for bubbles. But at such a small leak rate, you may not be able to see any.

Finally, maybe a product like Ride-On would slow the air loss (and balance the tire too!).

Dave
-2000 K1200LT
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post #3 of 5 Old Aug 30th, 2008, 9:14 pm
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Re: Leaky rear wheel?

The two main sources of air leaks are an improperly cleaned bead area during the tire change and the rubber valve stem. I scrub my bead area and have gone to metal valve staems and no leaks on five sets of tires.

John
2009 K1300GT Red Rocket
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2005 K1200LT Ocean Blue Blue Wizard 110 K and counting...
2006 Bushtec Turbo+2 Spell
2004 330 Ci Convertable
K4AN

Have ridden a Motorcycle in all 48
But lack DE, MA, RI and CT with the 2005 LT

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post #4 of 5 Old Aug 31st, 2008, 3:23 pm
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Re: Leaky rear wheel?

I properly cleaned my rims, mounted tires properly and yes, they just lose air.

I put "Ride-on" in the front tire and it slowed... a lot.. But then I had to replace the tire...

Still losing it.,... ca'use I don't have any more Ride-on..

...............
J.M.J...
Dcn Channing

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post #5 of 5 Old Aug 31st, 2008, 7:33 pm Thread Starter
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Re: Leaky rear wheel?

Quote:
Originally Posted by cfell
I properly cleaned my rims, mounted tires properly and yes, they just lose air.

I put "Ride-on" in the front tire and it slowed... a lot.. But then I had to replace the tire...

Still losing it.,... ca'use I don't have any more Ride-on..
At what rate do your tires lose air? My front has negligible loss, but the rear is ~4 psi per week which is annoying.

2017 KLR650 "Mule"
2007 K1200LT "Starship Enterprise", VOICE II, Navigator V, Motorrad Communicator
1987 Kawasaki Voyager XII
1976 Kawasaki KH400
1973 Kawasaki 100 G5
1970 Rockford Chibi (the orange one)

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