Author Topic: speedo trip rewind knob  (Read 569 times)

Offline rosco

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speedo trip rewind knob
« on: June 28, 2022, 01:51:08 PM »
Hi All
 Does anyone have a speedo trip rewind knob for a cb400  that they are willing to part with  It is a push fit on splines Unfortunately had to distroy mine while doing a refurb and they are not listed as a spare Thanks  Ross

Offline Oddjob

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Re: speedo trip rewind knob
« Reply #1 on: June 28, 2022, 02:29:24 PM »
Try Peter Horton Rosco. He's the guru on stuff like that.
Don't play stupid with me, I'm better at it

Offline rosco

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Re: speedo trip rewind knob
« Reply #2 on: June 28, 2022, 02:56:37 PM »
Was talking with him about faces etc and he suggested cb750faces for the parts Just assumed he didn't stock any But worth a message cheers

Offline Oddjob

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Re: speedo trip rewind knob
« Reply #3 on: June 28, 2022, 10:05:56 PM »
He has boxes and boxes of old speedos etc in bits, must have one somewhere in there.
Don't play stupid with me, I'm better at it

Offline rosco

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Re: speedo trip rewind knob
« Reply #4 on: June 28, 2022, 10:36:36 PM »
Peter has just messaged me  He is away till the weekend but may have one

Offline Matt_Harrington

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Re: speedo trip rewind knob
« Reply #5 on: June 29, 2022, 12:35:28 AM »
Hi All
 Does anyone have a speedo trip rewind knob for a cb400  that they are willing to part with  It is a push fit on splines Unfortunately had to distroy mine while doing a refurb and they are not listed as a spare Thanks  Ross

If you don't find one, I'm about to make a couple and could easily make another. They will, however, be made from Stainless and not ally...
Matt
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CB400F 1976 - New project
Moto Guzzi T4 - 1981
Triumph 3T - 1946 - Now finished(ish)
Triumph 3T - 1947 (somewhat dismantled!)

Offline paul G

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Re: speedo trip rewind knob
« Reply #6 on: June 29, 2022, 07:52:35 AM »
Hi All
 Does anyone have a speedo trip rewind knob for a cb400  that they are willing to part with  It is a push fit on splines Unfortunately had to distroy mine while doing a refurb and they are not listed as a spare Thanks  Ross
When you take the speedo apart you leave the knob on the shaft.
The shaft is in two parts put some heat on the shafts where they meet as it has thread lock on it.
Hold the shaft nearest the numbers with some long nose pliers and unscrew it LEFT HAND thread  ;)
Honda CB400 4
Honda CB550 K3 (sold)
Honda CB750 UK K1
Kawasaki Z650 C2
Kawasaki Z650 cafe racer (Sold)
Honda CD175 sloper

Offline rosco

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Re: speedo trip rewind knob
« Reply #7 on: June 29, 2022, 10:00:04 AM »
Cheers for that Matt.  If Peter hasn't got any  then i will take you up on your offer

Well Paul, you learn stuff everyday I never knew they unscrewed   Only read that to remove the knob use a dremel to cut a slot in the knob which can be repaired  This i was trying but totally destroyed the Knob  Every day a school day That is now logged Thanks

Ross

Offline paul G

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Re: speedo trip rewind knob
« Reply #8 on: June 29, 2022, 12:24:27 PM »
PM me email address for full guide.
Honda CB400 4
Honda CB550 K3 (sold)
Honda CB750 UK K1
Kawasaki Z650 C2
Kawasaki Z650 cafe racer (Sold)
Honda CD175 sloper

Offline rosco

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Re: speedo trip rewind knob
« Reply #9 on: June 30, 2022, 10:08:24 AM »
Wish i had known this before  Never mind  Its not a crime to make a mistake !! But its a crime not to learn from it ?? Ross

Offline Oddjob

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Re: speedo trip rewind knob
« Reply #10 on: June 30, 2022, 02:55:33 PM »
God that's deep Rosco
Don't play stupid with me, I'm better at it

Offline rosco

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Re: speedo trip rewind knob
« Reply #11 on: June 30, 2022, 03:06:24 PM »
May be deep, But true.   If you don't learn you keep making the same mistakes over and over ??

Offline McCabe-Thiele (Ted)

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Re: speedo trip rewind knob
« Reply #12 on: June 30, 2022, 03:20:16 PM »
May be deep, But true.   If you don't learn you keep making the same mistakes over and over ??

Commonly known as the learning dip.
Honda CB400 four super sport

Offline Matt_Harrington

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Re: speedo trip rewind knob
« Reply #13 on: June 30, 2022, 06:26:43 PM »
I've managed to remove the black knob from the shaft using a heat gun, should that be necessary.
Matt
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CB400F 1976 - New project
Moto Guzzi T4 - 1981
Triumph 3T - 1946 - Now finished(ish)
Triumph 3T - 1947 (somewhat dismantled!)

Offline kent400

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Re: speedo trip rewind knob
« Reply #14 on: July 01, 2022, 06:40:06 PM »
Interested to see the image taken from the guide I wrote many years ago on the subject of dismantling a 400F speedo. It's not necessary to remove the knob, remove the band and remove the 'C' clip and then the trip drum can remain in the body as mechanism attached to the base is lifted clean. The trip knob will now pass though the hole in the body and can be lifted out.  As previously mentioned the trip shaft needs to separated trip counter shaft in the manner described, a gas lighter is ideal for the purpose although this does require great care. Might unscrew easily but may need repeated heating before it will unscrew. What you won't want to do is to break the thread on the counter shaft.

Originally the speedo was assembled and the trip shaft was screwed in ( with tread lock added ) as the final assembly operation. 

Missing or broken knobs and if not too bothered by having an original some tube caps are very similar or a small radio knob that usually have a grub screw to secure it.

Original is on the right, tube cap and a radio knob on the left 
 

« Last Edit: July 03, 2022, 09:34:07 AM by kent400 »

 

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