Do it yourself Valve stem replacment - BMW Luxury Touring Community
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post #1 of 4 Old May 12th, 2008, 12:04 pm Thread Starter
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Location: Twinsburg, Ohio, USA
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Do it yourself Valve stem replacment

I had that feeling again (Mushy front end) this weekend. Checked pressure and tire for damage in a parking lot and when I went to hit the valve stem (Rubber new last November less the 3K) it went SHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH then I finished the sound with "IT". I managed to pump it back up to 42 very gently with on board Air compressor to limp home and had 20 LBS left in the tire when I hit the barn after a 5 mile crawl.

Got the tire off Saturday, but to late to get it to a shop and no one open on Sunday.

Neighbor stoped by saw me with front tire in hand and asked what happened told him and said I will take to shop on Monday.

He said lets fix it now. I told him I had no tire mounting gear and he said you do not need it. He showed me a trick (Which I did not think would work) that he used to do about 30 years ago when he was a kid on his bikes.

He had me take a small block of wood (3/4 " thick) and a 12 inch C clamp (Wood on solid side of clamp and crank against tire side wall just under valve stem on red dots on the side wall) and break the bead on the tire and continue to crank it in until I could see the stem bottom on the inside of the wheel.

Popped out the old stem and in with the new (Metal) and refilled with air to 55 LBS. then placed tire in water in wash tub and bingo no bubbles. Brought her back down to 42 and put her back on. (Should have taken pics but did not think of it at the time)

I proceeded to do the back with it on the bike in less the 45 Minutes.

I put Metal valve stems on front and back on Sunday picked them up from NAPA size .453 on the 02 LT.

Took her out for a spin between the rain on Sunday and she felt stable again..

I am just wondering how the new stem affected tire balance or if clamping the sidewall down that far could have damaged the tire sidewall.

Anyone replaced a valve stem this way and had any adverse affects?


Rich Kirker
2002 LTC Pacific Blue
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post #2 of 4 Old May 12th, 2008, 12:59 pm
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Re: Do it yourself Valve stem replacment

Adverse effects:
-loss of dealer revenue.

Dcn Channing

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post #3 of 4 Old May 12th, 2008, 7:18 pm
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Re: Do it yourself Valve stem replacment

Hi Rich , A friend of mine call a few weeks ago . He had a rear tire on his '99 K1200LT go flat . He had checked the pressure in his tires before going for a ride . Then around a hour into his ride , it didn't feel right . So he stopped ,& checked his tires . He thought he picked up a nail or something . The rear was low ,so He put a little air in to it . Then the metal part with the valve in it , the part in the middle of the rubber part blew out (:-0).

I have a spare rear wheel & tire for our 2002 K1200LT/Hannigan 2+2 , so I ran it out to him & fixed him up ... We go to Florida for 4 mounths ever winter , so I always go with a new rear . With all them K1200LT trikes out there , there are a lot of rear wheels laying around (;-Ľ).

If you are thinking of getting your owen tire equipment . I use a Harbor Freight Portable Tire Changer & Motorcycle Tire Changer Attachment With a set of Mojoblocks on it . A Mojolever , & a static wheel balancer by Marc Parnes . Works for me .

Patric Blackman
2002 K1200LT/Hannigan2+2
2010 R1200GSA ...1987 Helix...
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post #4 of 4 Old May 12th, 2008, 8:04 pm
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Re: Do it yourself Valve stem replacment

Been there...

Scared the crap out of the wife, I rode the flat home.

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