Tach Drive

  • MAR
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Tach Drive

18 Jan 2016 10:38
#707157
I have a new tach and it is grossly inaccurate. At low RPM it looks fine. When revving, it goes WILD.
Is there some sort of tach drive in the head that can be replaced? I am assuming, where the tach cables goes into the head there is a something worn out.

Thanks so much.
1975 KZ 900
1975 Laverda 750 SF 2
1978 Harley XLCR
1982 Laverda 1200 Mirage TS
1995 Ducati 916 Superbike
2001 Aprilia Falco SL
2004 Triumph Thruxton
2012 MV Agusta F4R

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  • rrsmsw9999
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Re: Tach Drive

18 Jan 2016 10:48
#707158
Verify that the cable and wheel mech is lubed properly. If this is not the problem you may need another meter. The tach units have sealed oil in them and are not serviceable to my knowledge. R
1980 KZ 1000E2
Crashed 6/2016

1980 KZ550A
Sold 3/2016

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  • MAR
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Re: Tach Drive

18 Jan 2016 14:15
#707174
Yes gauge and cable new. It works fine until the revs go up. Both cable ends greased well.
Is it possible the new tack is bad?
1975 KZ 900
1975 Laverda 750 SF 2
1978 Harley XLCR
1982 Laverda 1200 Mirage TS
1995 Ducati 916 Superbike
2001 Aprilia Falco SL
2004 Triumph Thruxton
2012 MV Agusta F4R

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  • z1kzonly
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Re: Tach Drive

18 Jan 2016 14:32
#707177
Looks like the new one is crap! It's not the cable or the worm gear on the exhaust cam. That stuff can't change.
There are some other forum topics about this same thing happening.
Was the tach New manufactured? Or just a new one to you? As bought used or whatever?
Livin in "CheektaVegas, NY
Went thru 25 of these in 40 yrs.
I SOLD OUT! THE KAW BARN IS EMPTY.
More room for The Old Girl, Harley 75 FLH Electra Glide,
Old faithful! Points ign. Bendix Orig. carb.
Starts everytime!

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  • MAR
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Re: Tach Drive

18 Jan 2016 14:56
#707181
New from Z1.
They said to send it back.
Just can t imagine it s the new tach
1975 KZ 900
1975 Laverda 750 SF 2
1978 Harley XLCR
1982 Laverda 1200 Mirage TS
1995 Ducati 916 Superbike
2001 Aprilia Falco SL
2004 Triumph Thruxton
2012 MV Agusta F4R

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  • spdygon
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Re: Tach Drive

19 Jan 2016 14:02
#707285
All of those are junk...evening if you get one that's works it'll be temporary.
Best if you can find one used in good condition.
1982 GS1000sz Katana ( #15...17K Miles)
1982 GS1000sz Katana ( # 297....7100k Miles)
1978 Kz1000 Z1R. 10K Miles1
1978 kz1000 z1r 27k miles
1977 KZ 1000 A ( Project ) 54K Miles
1976 Kz900A4 (Red)21K miles
1976 Kz900A4 ( Red)7500 miles
1974 Z1 900 project

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  • SWest
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Re: Tach Drive

19 Jan 2016 14:10
#707287
Well, we'll see how long mine last. 2000 miles on the speedo and still steady.
Steve

Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229

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  • floivanus
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Re: Tach Drive

19 Jan 2016 14:25
#707291
If I were to do a new tach, I would gut my broken one and put the guts from an electronic tach in the case.

Actually I am doing that, just have to find a broken kz tach to do it with
my bikes; 80kz1000(project), 77 gl1000, 74 h2 (project)
Past; 78 kz1000, 83 kz550
Andrew

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  • MAR
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Re: Tach Drive

19 Jan 2016 14:57
#707297
Nothing on e bay. I'll try sending it back.
I like the OEM look.
1975 KZ 900
1975 Laverda 750 SF 2
1978 Harley XLCR
1982 Laverda 1200 Mirage TS
1995 Ducati 916 Superbike
2001 Aprilia Falco SL
2004 Triumph Thruxton
2012 MV Agusta F4R

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  • missionkz
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Re: Tach Drive

19 Jan 2016 16:20
#707308
swest wrote: Well, we'll see how long mine last. 2000 miles on the speedo and still steady.
Steve

Can you tell who made yours Steve.... ?
Bruce
1977 KZ1000A1
2016 Triumph T120 Bonneville
Far North East Metro Denver Colorado

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  • SWest
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Re: Tach Drive

19 Jan 2016 16:41
#707315
That's a good question. I don't know.
Steve
Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229

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