constantly ripping valve stems off.

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:

There are 2 rimlocks on the rear wheel stock.

Make sure your rimlock is compatable with the rim and engages the inner bead properly.

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

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

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:

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.

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.

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.

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.

I think we heard you already.

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

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:

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.

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

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.

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

:devil:

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

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