Topic: 550 lower steering bearing race OD.

[Dimitri13]

Need to know the OD of it so I can get a socket to drive the race in. I don't have access to it right now otherwise I'd measure it myself.

[bwaller]

50mm.

[Black 750K8]

So if you don't have a metric socket that would be a 1-7/8th socket or maybe a 1-15/16th?

[Dimitri13]

50mm doesn't sound right. I was driving it in with a 1-1/2" socket, but it was too big to fit in the headstock. 36mm was too small.

[bwaller]

How about 49.99mm? This is the outer race OD for the lower steering head bearing. 

[Dimitri13]

Are we talking about the same thing?

Tapered bearing if that makes a difference.

[Black 750K8]

Look up your bike here and post back with what you are talking about.
http://www.cmsnl.com/honda-cb-four_model7148/

[jonda500]

50mm.

+1  just went out to the shed, measured(I have a frame with no bearing cone in it), it is definately 50mm!

[Dimitri13]

Nevermind, I'm a tard and forgot how to tool. The socket was 1-1/2", but the OD of that socket is 52mm. I didn't measure the OD of the 36mm socket, but I'll try renting a slightly bigger one, making sure to measure the OD at the store.