Slimline steering head bearings

Flatspot · Apr 17, 2024

When I stripped down my frame the head races were taper roller. They appear to be the same size as some ball races 6205 2RS that I have in stock - I’m pretty sure they’re what I used on my Commando

Can I replace the greasy roller bearings with the sealed ball races? The only minor consideration I have is the roller race is a press fit to the lower stem, then I’d fit the bearing to the stem, then ease the outer up into the frame. I have a pair of each in my stock.

Yes or no?

t ingermanson · Apr 17, 2024

You'd need a spacer between sealed ball bearings or they bind.

Flatspot · Apr 17, 2024

The ball races would butt up to the inside of the frame where there’s a lip surely?

Triton Thrasher · Apr 17, 2024

I use the sealed ballraces with the spacer. It’s fine.

Triton Thrasher · Apr 17, 2024

I expect you can make it yourself.

SPACER TO CONVERT DOMINATOR TO COMMANDO TYPE STEERING HEAD BEARING (067604)

OUTSIDE DIAMETER: 1 1/8" (29MM)INSIDE DIAMETER: 1" (25.4MM)OVERALL LENGTH: 5 1/4" (134.5MM)

www.rgmnorton.co.uk

Flatspot · Apr 17, 2024

I still don’t see why they need a spacer as once they’re inside the top and bottom of the headstock they can’t go anywhere

Fast Eddie · Apr 17, 2024

Flatspot said:
I still don’t see why they need a spacer as once they’re inside the top and bottom of the headstock they can’t go anywhere

Cos when you torque the stem nut you’ll be loading the bearings.

Flatspot · Apr 17, 2024

Got it!

I’ll fit the rollers I’ve got.