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Discussion Starter · #1 ·
I won an eBay auction for a tach to replace the non functioning one on my '71 450. Can someone tell me if the black housing is removable with out damaging the tach? The housing on my eBay tach is damaged but my old tach has a good housing. I can see the two phillips screws that hold the innards to the bottom plate but it's not obvious (at least to me) how to remove the housing although I would think it has to come off.

Additionally, the rubber cushion between the chrome ring and the tach body crumbled apart when I took the tach off. Does anyone have an idea on how to replace/repair the rubber stuff. I suppose some rubber weatherstrip could be made to work but any other ideas would be appreciated.
 

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The tach and speedo housing are basically two clamshells held together with a metal "ring" or band. The shiny metal ring that sticks out a little about a 1/4 from the bottom. To seperate the top black part from the metal bottom part, you slowly pry the ring away from the metal bottom part. Do it from the bottom so you don't see the marks when you put it back together. I don't have any pics to show you. maybe someone else does. They are designed to be hard to take apart so nobody messes with the Odo.

The shiny metal band on the one on the left is what I am talking about.


As for the rubber cushions, I bought two new ones from my honda dealer. I think it was $26 for a pair. I was surprised they were still available. I've seen them on ebay for more. Mine were melted or glued on or something. They are supposed to hold the gauge out away from the cup a little. My old ones were not and the gauges rattled around a lot. The new ones work great. Part # 37242-319-000 (meter rubber). If you think you can fashion something with weather stripping it might work. The idea is to suspend the gauge on a cushion of rubber.
 

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Discussion Starter · #3 ·
Flugtechnik said:
The tach and speedo housing are basically two clamshells held together with a metal "ring" or band. The shiny metal ring that sticks out a little about a 1/4 from the bottom. To seperate the top black part from the metal bottom part, you slowly pry the ring away from the metal bottom part. Do it from the bottom so you don't see the marks when you put it back together. I don't have any pics to show you. maybe someone else does. They are designed to be hard to take apart so nobody messes with the Odo.

The shiny metal band on the one on the left is what I am talking about.

As for the rubber cushions, I bought two new ones from my honda dealer. I think it was $26 for a pair. I was surprised they were still available. I've seen them on ebay for more. Mine were melted or glued on or something. They are supposed to hold the gauge out away from the cup a little. My old ones were not and the gauges rattled around a lot. The new ones work great. Part # 37242-319-000 (meter rubber). If you think you can fashion something with weather stripping it might work. The idea is to suspend the gauge on a cushion of rubber.
Thanks for the detailed explanation. I just saw on the parts fiche that the rubber cushions are still available from the deal so I'll order them. Mine are in the same condition that you mentioned....melted and crumbling. It looks like the rubber grommets for the supports nuts are still available as well, and they're reasonably priced, that's good news.

I'll take a look at prying the tach apart tomorrow. The resettable ODO on the speedometer is not working either so maybe I can fix that too.
 

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Be very careful and take your time taking the metal band off. You do not want to break it. I haven't actually done this but that is what someone told me to do. If I am mistaken, hopefully someone will speak up.
 

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Discussion Starter · #5 ·
Flugtechnik said:
Be very careful and take your time taking the metal band off. You do not want to break it. I haven't actually done this but that is what someone told me to do. If I am mistaken, hopefully someone will speak up.
I started messing with it last night and it's going to be a little time consuming. I started from the bottom of the ring and started working my way around using a little screwdriver. It's kind of like opening a tuna can with one of those old military field can openers.....one cut at a time. :D
 

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Yeah, I started to open mine and then decided it wasn't worth the hassle. I was just going to clean out the inside and maybe lube it. Maybe replace the gauge faces. They were working so I decided not to.
 

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ya gotta love auctions like that.....

VARIOUS CONDITION. SOME MAY ONLY BE GOOD FOR PARTS

translation: I've got a bunch of junk here please buy it
 
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