HarleyMotorcyclePartsSteering Head Bearing Check and Adjustment
That notch at dead-ahead, or the weave at speed, is usually here.
Steering head bearings carry every bump the front wheel takes, straight up through the frame, and they spend most of their life pointed dead ahead. That is exactly where they wear a notch — and a notched steering head makes a bike feel like it wants to run straight and resist small corrections, which riders adapt to without ever noticing.
Tools
- A way to lift the front wheel clear of the ground with the bike supported by the frame
- Torch
- Torque wrench and the correct spanner for the adjuster
- Service manual
The three checks
Get the front wheel clear of the ground with the bike supported securely by the frame, not balanced on the sidestand.
NOTCH TEST: with nothing touching the bars, turn the steering slowly from lock to lock using one finger on the end of a bar. It should be smooth the whole way. If it stops, catches or wants to settle at dead-ahead, there is a notch worn into the bearing race.
FREE-FALL TEST: centre the steering and give it the lightest nudge. It should fall away to one side under its own weight. If it sits there, the bearings are too tight — or notched.
PLAY TEST: hold the bottom of the fork legs and push and pull fore and aft. Any knock is looseness in the steering head. Do the same while holding the front brake on and rocking the bike — a clunk you can feel through the bars is the classic sign, though be careful not to confuse it with fork or wheel bearing play.
Too tight is as bad as too loose
Loose steering head bearings produce a weave or a wobble, a clunk over bumps, and accelerate their own wear by hammering the races.
Over-tight bearings make the bike feel stable in a straight line and reluctant to turn, mask road feel, and — importantly — brinell the races into a notch far faster. The temptation after finding play is to nip it up hard. Do not.
The adjustment procedure and the torque figures are model-specific and often involve a specific sequence: tighten to a setting figure, move the steering lock to lock to settle the bearings, back off, then set the final figure. Follow your service manual. Guessing at this is how a good set of bearings gets ruined in one afternoon.
Notched means replacement, not adjustment
Once a race is notched, no amount of adjustment fixes it. Tightening hides the symptom briefly and makes the wear worse.
Replacement means the front end comes apart and the old races are driven out of the frame neck and new ones driven squarely in. It is a real job with a real risk of damaging the frame neck if done carelessly.
If the bike is apart anyway — fork oil, a front end change, a rebuild — this is the moment to deal with the steering head. It is nearly all shared labour.
Mistakes that cost money
- Tightening the adjuster hard to cure play, and brinelling the races.
- Adjusting without following the settle-and-reset sequence in the manual.
- Mistaking fork bushing play or wheel bearing play for steering head play.
- Adjusting a notched bearing instead of replacing it.
- Reassembling without greasing new bearings properly.
When to stop
A weave at speed is a handling fault, not a comfort complaint. If the bike wobbles on a trailing throttle or weaves under braking, sort it before the next ride.
Parts for this job
Check fitment for your own model and year before ordering — add your bike and we will flag what fits.
Other Harley how-to guides
This guide covers procedure and judgement. Torque figures, fluid capacities, gaps and tension settings are specific to your model and year and must come from the factory service manual for your motorcycle — we deliberately do not print numbers we cannot stand behind for your bike. Independent aftermarket retailer, not affiliated with Harley-Davidson, Inc.