Ever tightening headset!

zenbiker

Maximum Pace
Mar 4, 2008
802
228
63
Chofu
#1
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?
 

GSAstuto

Maximum Pace
Oct 11, 2009
945
242
103
tokyo
www.roadfixie.com
#4
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!