SOHC.co.uk Forums > CB350/400

Gear shift pivot play fix?

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McCabe-Thiele (Ted):
I'll try them thanks

Bryanj:
Me, i would cut off the pin, drill and tap the bracket then make a new pin to lockite in to the correct diameter afterreaming theedal round.
Would be a one off special but look std and work

McCabe-Thiele (Ted):

--- Quote from: Bryanj on November 20, 2021, 03:30:01 PM ---Me, i would cut off the pin, drill and tap the bracket then make a new pin to lockite in to the correct diameter afterreaming theedal round.
Would be a one off special but look std and work

--- End quote ---

I like your thinking Bryan that would definitely work - on Monday I'm going to try to measure up the pivot lug & the inside of the gear change pedal tube  to identify where most of the wear is.
I know the gear change works okay with the wear as it is but I can't live with it.

Update: I've measure the hole in the gear lever shaft with my calipers so measurements are basic.

Hole measurement nearest frame (roughly horizontal) is 12.28 mm and at 90 degees rotation it's 12.33 mm - that's an ovalation of 0.05 mm. Thats about 19 thousandths of an inch.

Hole measurement at the circlip end (roughly horizontal) is 12.30 and at 90 dgrees rotation it's 12.39 mm - that's an ovalation of 0.09 mm.  That's about 35 thousandths of an inch.

Clearly much more ovalation where one might expect it where the lever is closer to the outer edge of the tube . That explains why it wobbles / moves so much.
Not done the pivot yet as I really need to take it off the frame.

Bryanj:
I would be tempted to drill and ream the pedal boss at 1/2 inch then have a thinwall brass bush made, approx 27/64 bore

McCabe-Thiele (Ted):
Hi Ken, So far it looks as if the lever has taken the brunt of the wear. The two ball joints are in pretty good condition. I suspect looking at the general wear on the lever that it may have been changed for a used one due to previous damage. When I've checked the pivot for wear I might have to bite the bullet and buy the DS lever - only when I'm sure the bulk of the wear is on the lever. As the lever is in poor condition chrome wise I see little benefit in bushing a crap lever

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