constantly ripping valve stems off.


16 replies to this topic
  • tool

Posted September 09, 2004 - 06:39 PM

#1

i am using a michelin m 12 rear, and i think a motion pro(?) rim lock. the lock is all rubber on the outside and its always tight, but i have torn the valve stem off of 2 ultra heavy duty tubes.
and the tire is spinning on the rim again! both the valve stem and the rim lock are angled like they are twisting from acceleration. :thumbsup: this is from one day at the track.
is it the tire or the rimlock? or do i need to drill another hole and use 2 rimlocks? :devil:

  • SFO

Posted September 09, 2004 - 06:59 PM

#2

There are 2 rimlocks on the rear wheel stock.
Make sure your rimlock is compatable with the rim and engages the inner bead properly.

  • B86_Racer

Posted September 09, 2004 - 07:05 PM

#3

There is only one rim lock on the YZ's; 2 on the WR's.

  • motocrosschump

Posted September 10, 2004 - 05:20 AM

#4

don't tighten your valve stem nut and try that.

  • YAMAKAZE

Posted September 10, 2004 - 07:22 AM

#5

I have (2) rim locks on my 02 YZ426F....... Matter of fact I just replaced one of them last weekend because the stem had moved a bit.

I also bought some way cool rimlock adapters from FASSTCO that are supposed to keep that from hapening again.

Bonzai :thumbsup:

  • sparks426

Posted September 10, 2004 - 07:46 AM

#6

SFO is pointing you in the right direction - the rim lock is likely for a smaller rim. My stock YZ rim has provisions for two rim locks, but came with one from the factory. If you can, get a factory rim lock. The tip on not tightening the valve stem nut is very important too. I usually finger tighten the nut against the valve stem cap, as I find if it's loose it can vibrate back down against the rim. If it's loose, you can have some slippage and not rip the stem.

  • YZDAD1

Posted September 10, 2004 - 09:02 AM

#7

Make sure the rim lock is the correct match for your rim. I.E.: 2.15 rim lock for 2.15 rim (it's on the lock) a 1.85 on a 2.15 or a 2.15 on a 2.5 will do exactly what you are experiencing. Also, Hondas have a neat sleeve that slides over the valve stem instead of using the lock nut.

  • YZDAD1

Posted September 10, 2004 - 09:02 AM

#8

Make sure the rim lock is the correct match for your rim. I.E.: 2.15 rim lock for 2.15 rim (it's on the lock) a 1.85 on a 2.15 or a 2.15 on a 2.5 will do exactly what you are experiencing. Also, Hondas have a neat sleeve that slides over the valve stem instead of using the lock nut.

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  • YZDAD1

Posted September 10, 2004 - 09:02 AM

#9

Make sure the rim lock is the correct match for your rim. I.E.: 2.15 rim lock for 2.15 rim (it's on the lock) a 1.85 on a 2.15 or a 2.15 on a 2.5 will do exactly what you are experiencing. Also, Hondas have a neat sleeve that slides over the valve stem instead of using the lock nut.

  • TimFurryBalls

Posted September 10, 2004 - 11:44 AM

#10

I think we heard you already.

  • motocrosschump

Posted September 10, 2004 - 12:40 PM

#11

you may want to "Make sure the rim lock is the correct match for your rim. I.E.: 2.15 rim lock for 2.15 rim (it's on the lock) a 1.85 on a 2.15 or a 2.15 on a 2.5 will do exactly what you are experiencing. Also, Hondas have a neat sleeve that slides over the valve stem instead of using the lock nut. "

Just Kidding YZDAD

  • Smegol

Posted September 10, 2004 - 01:52 PM

#12

It happens all the time on mine. When I notice it getting bad I just put the bike up on the stand, deflate the rear tube, loosen the rimlock and put it in 1st gear. Then I grab the tyre and spin it anticlockwise. One good pull is enough to straighten the valve stem up. :devil: :thumbsup:

  • tool

Posted September 10, 2004 - 02:22 PM

#13

ive heard of that trick and im gonna try it. i was sure to get a 2.15 rimlock, and i tighten that SOB down. im running 16 psi in the back too.
ill be sure to get a factory rimlock, maybe 2. at least now i know what that rubber plug is on the rim. :thumbsup:
i thought it was the inferior michelin causing it, because its been giving me nothing but problems since i mounted it... ive gone through 5 tubes on this one tire.

  • YZDAD1

Posted September 10, 2004 - 05:34 PM

#14

Hey! I really don't know what happend...........happend..........happend.........happend, oh now i do.......... :thumbsup:

  • sirthumpalot

Posted September 11, 2004 - 05:17 AM

#15

How much pressure are you running out of curiosity? I vote rim locks too. My 01' is in the boat that came with a rim with 2 holes for rim locks but only one installed.

A second trick for straitening the tire, that also works on the front, is put it on the stand to freewheel (neutral) and give it a good spin. Then slam on the brakes. The tire should rotate back into place (assuming you spun it the correct direction). Also make sure the tire is deflated.

  • tool

Posted September 11, 2004 - 12:04 PM

#16

Hey! I really don't know what happend...........happend..........happend.........happend, oh now i do.......... :thumbsup:


:devil:

  • rbm33

Posted September 13, 2004 - 04:34 AM

#17

you need to go with 2 rimlocks and dont tighten the valve stem nut!!





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