Ever tightening headset!

zenbiker

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Mar 4, 2008
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Chofu
I`ve changed the forks on my MTB to non sus ones. However, after setting the head bearings and riding for 10 kms, the headset seems to tighten itself.
Headset is a star washer that ha be banged into the fork tube type.
Any idea what I`ve done wrong?
 

zenbiker

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Mar 4, 2008
807
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Chofu
Thanks for the link. I`ll take it apart and start again to see what I`ve done wrong on the weekend.:eek:
 

GSAstuto

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Oct 11, 2009
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tokyo
www.roadfixie.com
My guess is that you've preloaded the top bolt (tightened it) AFTER you've improperly torqued the stem lock bolts. And if you've lubed the stem a bit - then general virbation of riding will now cause your headset loading to increase.

You should NEVER tighten the top bolt after you've set the bearing preload. In fact - it just needs enough snugging to just keep the cap on, that's all - its basically only used to set the bearing pre-load until you've tightened the stem lock bolts.

The other thing is make sure you sequentially tighten the stem locking bolts - a little at a time - until you've reached an equal torque. Should be roughly 40-60 in-lbs. If you don't have a torque wrench - this is only about 5lb-7lb pressure on your allen key!