K11 Owners Group

Ted · Posted: Sat Apr 24, 2010 11:57 pm Post subject: Warped Tach Face?!?

Hi Folks,

As I was returning from Morton's Saturday on my new to me 1994 K75RT I immediately noticed that the tach seemed stuck. I had parked it in the sun for about 4 or 5 hours. On the way home (with the sun over my shoulder the whole way) it moved a little, seemed to get to about 4,200 RPM and stick there. As I was taking my suit off after getting back to the garage (in the shade) I noticed it was back to zero and when started and revving, it had magically returned to normal.

I am thinking I have the dreaded warped face.

Is there an easy fix for this? Can I replace just the tach face? Temper it back to flat in the oven? Just ignore it?

Thanks folks Smile

Ted
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Ted

KOG#1

Jim · Posted: Sun Apr 25, 2010 2:12 am Post subject: warped tach face

A couple of the guys here have taken the instrument pod apart, v_e_r_y carefully removed the needle, and glued the tach face back down.

I can see the face on mine warp in the sun - but so far not enough to hit the needle.

I suppose you could figure out a sun shade for it...
_________________
Jim
1997 K1100LTSE 94,000 - still has gremlins!
1995 R100RT Classic 16,650 crashed - repaired!
1992 K75RTP 46,000

"We shall not all die, but we shall all be changed."

Flying Duck · Posted: Sun Apr 25, 2010 8:01 am Post subject:

No need to replace anything. Pull the guts out. Glue a small strip of something in the upper left hand corner as a spacer to push it back from the lens.
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93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
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joeangi · Posted: Sun Apr 25, 2010 3:42 pm Post subject:

I have a similar problem with my tach face. I wish I had known when I was installing Drakes LED's last week.....Oh well, the clock that I thought was fixed is Fooked....so it is only a matter of time 'till I pull the cluster again. For now I am attempting a patented JO repair.....black tape.
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1994 K1100RS
1986 K100RS

Phil Marvin · Posted: Sun Apr 25, 2010 8:34 pm Post subject:

Hi, Ted,
I never had the problem with the '95 K75RT nor the '94 K75A/3. Both Paul Glaves and I have the same problem with our '95 K75RTP's (one serial number apart). Our problem is with both the tach and the speedo. I've taken my instrument cluster apart a couple of times and have made and installed a shim to move the "glass" slightly farther away from the needle and face. It didn't help. I then put a drop of sewing machine oil onto the needle shaft and made sure it got to where the shaft passes through the face plate. I couldn't get a drop onto the tach shaft. So far the speedo has not stuck again, BUT it hasn't been hot enough (my opinion) to really give it a test. If it doesn't work, I purchased a new complete instrument cluster (on closeout) from MotoBins for GBP125 or, including shipping, a little over $200. That's my next move if the speedo still sticks.
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Ride Safe,
Phil Marvin in El Paso, TX
'94 K75A/3
'95 K75RTP

Klinker · Posted: Sun Apr 25, 2010 9:38 pm Post subject: Re: Warped Tach Face?!?

Ted · Posted: Mon Apr 26, 2010 12:18 am Post subject:

Haha - good one! That pic was taken on top of Cadillac Mountain by Larry Fears, holy crap that was 12 or 13 years ago!

Has anyone ever taken the tach face off and tried to re-temper it? Maybe stick it between a few paper towels and hit it gingerly with an Iron until it is flat again?
_________________

Ted

KOG#1

Jim · Posted: Mon Apr 26, 2010 12:38 am Post subject:

joeangi · Posted: Mon Apr 26, 2010 9:59 am Post subject:

If Ted's is like mine. The tach face has not delaminated, it has just warped. I was thinking of hitting it with a heat gun and gently forming it back flat. The iron trick might work?
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1994 K1100RS
1986 K100RS

Ted · Posted: Mon Apr 26, 2010 1:41 pm Post subject:

Yep, it shows no delamination at all, matter of fact if the tach weren't sticking I couldn't tell by looking at it anything was wrong. If I had to guess, mine is bowing out in the middle catching the needle not at an edge but where it joins the pin in the middle of the face.

I think the iron trick might work, we'll have to see. I know metal can be tempered back into shape, I have no idea if plastic will do the same? Can't hurt to try though Smile

Does anyone know if the cluster on a K75RT can be removed without having to remove all the tupperware?
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Ted

KOG#1

Flying Duck · Posted: Mon Apr 26, 2010 3:10 pm Post subject:

joeangi · Posted: Sat May 01, 2010 5:51 pm Post subject:

Just wanted to let you know, I had to tear apart my cluster again today. (turn signal bulb was inop)....loose connection I guess. Anyway, I took a black pen, cut it to about 3/8" long and split it lenthgwise. I put a small drop of glue on it, to hold it against supports, so that it could push down on the tach face when I put it all back together, the tach face was nice and flat.

Easy fix....give it a try.

Sorry, I did it at my desk at work today, no pics.

Joe
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1994 K1100RS
1986 K100RS

malcolmt · Posted: Sun May 02, 2010 1:23 am Post subject:

Tim (Midland Section) · Posted: Mon May 03, 2010 1:58 pm Post subject:

If it's not too late, may I suggest a dessicant pack (silica gel) in the clocks before reassembly. Works for me.l
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Regards Tim,

Grey haired riders don't get that way by pure luck
1996 Guzzi Cali3 LAPD
1972 750 Commando
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#485