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Odometer knob removal

  • Gr8uncleal
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Odometer knob removal was created by Gr8uncleal

How does one remove the odometer (trip meter) knob on the Yamaha speedos from late 60s to mid 70s - eg AT, CT, DT, RT etc? If it is a small screw through the centre, is it straightforward to drill this out if the JIS screw head has corroded?

Thanks.
13 Apr 2021 08:05 #1

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Replied by DEET on topic Odometer knob removal

I have had success in drilling them out.
 
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Where the Yamaha Enduro is still a current model...
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13 Apr 2021 09:49 #2

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Replied by Gr8uncleal on topic Odometer knob removal

Thanks DEET.

What size drill bit did you use?

I'll be contacting you in due course for some silver/grey sheathing - just need to suss out how much I want/need first! 

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13 Apr 2021 10:27 #3

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Replied by Pedalcrazy on topic Odometer knob removal

Just last night I removed the screw from a 73 speedo. It's a Speedo I bought as a spare and I just needed the knob for a 71. The hole where the screw is was plugged full of mud. I cleaned it out and sprayed carb cleaner and then compressed air several cycles of that. I looked in the hole and litterley could not see the head of a screw. I used a small optometrist Phillips head driver with pressure and worked it in to where the screw should be. Thought I felt a little bite! More cleaner and air and another try with pressure. It moved! Then sprayed some PB Blaster in and worked the screw back and forth. It loosened right up and came out! Long story but I would have only given myself a 10 percent chance of getting it out based on what I started with. My opinion is you'd have less than that drilling. Try my method with the best little driver you can get. The screw isn't much bigger than what's in your glasses.
1978 DT400E
1976 DT400C
1973 RT3
1971 RT1B
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14 Apr 2021 18:04 #4

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Replied by Gr8uncleal on topic Odometer knob removal

Thanks.

Funnily enough, the knob on the DT3 that I've just bought is snapped off right by the screw, so I can see exactly what size it is.

Left hand thread, correct?

If I were to attempt drilling, do I just need to drill off the screw head in order to release the knob? I guess I need to go careful so as to not generate too much heat and distort the plastic.
14 Apr 2021 23:41 #5

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Replied by Gr8uncleal on topic Odometer knob removal

Photo of the broken one on my DT3, showing the size of the screw, for those that might be interested.

 

 
15 Apr 2021 03:00 #6

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Replied by Pete-RT1 on topic Odometer knob removal

You'll get that out Alan, I have every confidence in you

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Yamaha RT-1
Yamaha CT1-B
Yamaha CT1-C
Honda XR250
15 Apr 2021 03:11 #7

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Replied by Gr8uncleal on topic Odometer knob removal

That one's not the problem Pete, it's the screw in the knob that I want to replace it with!
15 Apr 2021 03:30 #8

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Replied by Pedalcrazy on topic Odometer knob removal

Hey Al...The screw is right hand NOT left hand. In other words it is like most other screws you come across.  Righty tighty lefty lucy.
1978 DT400E
1976 DT400C
1973 RT3
1971 RT1B
15 Apr 2021 16:16 #9

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Replied by Gr8uncleal on topic Odometer knob removal

Thanks.

Someone on another forum said that they are left hand thread - I wonder if the later styles changed (RD250/350/400 etc)? 

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16 Apr 2021 00:00 #10

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