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1Back to top Go down   Tachometer stops early Empty Tachometer stops early on Thu Oct 17, 2013 9:35 pm

alanretired '85 K100

alanretired '85 K100
active member
active member
Engine keeps going tach gets up to about 6700 rpm then falls backwards. If I keep reving it will suddenly jump back up to 8000+ rpm.
Any ideas  on what is happening?
Thanks
Alan

    

2Back to top Go down   Tachometer stops early Empty Re: Tachometer stops early on Thu Oct 17, 2013 9:42 pm

Two Wheels Better

Two Wheels Better
Moderator
Moderator
It could be as simple as the multi-pin connector at the back of the gauges needing a thorough cleaning. They're fairly fine gauge pins and corrosion gets in and doesn't let go, causing all manner of strangeness. Are there any other difficult-to-explain electrical issues? We use two-part DeOxiT (who really knows how to spell that bloody name?) and the product should be used on all of the connectors on the bike.

http://www.caig.com/

(it's actually DeoxIT)


__________________________________________________

1977 R75/7-R100 grey, '87 K100RS red, '93 K11-K12 aka 'Big Block' black, '96 K1100RS black, '98 K1200RS red, '09 K1300GT red, & 2013 R1200RT-Polizia black & white.

    

3Back to top Go down   Tachometer stops early Empty Re: Tachometer stops early on Thu Oct 17, 2013 9:45 pm

charlie99

charlie99
VIP
VIP
intermittent connection on the power in the instruments specifically the tacho ?

some of the really early models have a slightly different issue of lagging revs indication ...or overshoot

whilst in there you could probably change some of the dried out electrolytic capacitors ...now nearly 25 + years old

 
just a thought


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OTachometer stops early Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

4Back to top Go down   Tachometer stops early Empty DEoxIT on Thu Oct 17, 2013 10:58 pm

alanretired '85 K100

alanretired '85 K100
active member
active member
I see there are four different series of DEoxIT. Which is appropriate? Thanks,
Alan

    

5Back to top Go down   Tachometer stops early Empty Re: Tachometer stops early on Fri Oct 18, 2013 5:14 am

Ghost who rides

Ghost who rides
Life time member
Life time member
I use the red and gold liquid in little nailpolish bottles with a brush.

Others use the spray cans also 2 parts, cleaner and treatment.

I don't know of the other 2 types, maybe different size containers?

The liquid one goes a long way, should see me and the K out! especially since I have two

sets, don't ask!


__________________________________________________
1986  K 75 C   2nd owner 187,000kms showing .
1987  K100RT  Police repainted, rough and unloved.
    

6Back to top Go down   Tachometer stops early Empty Re: Tachometer stops early on Fri Oct 18, 2013 7:06 am

smithy

smithy
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There is a few different brands of Deoxit, but just beware  it is a phosphoric acid based product . So don't get it on painted surfaces, and after about 10 minutes neutralize with metho.

smithy


__________________________________________________
87 K100rs : Vin 9462 
86 K100rt : Vin 9901
Naked
98 K1100lt: Vin 8044
    

7Back to top Go down   Tachometer stops early Empty Re: Tachometer stops early on Sat Oct 19, 2013 7:51 pm

K-BIKE

avatar
Life time member
Life time member
Hi All,
Just to clear up a misconception in the previous post by Smithy there is only one brand of DeoxIT, it is made by Caig in the US and it available in several formulations, it is not phosphoric acid based and it does not need to be washed off nor neutralised. It is put on with either the small bottle with the little nail polish brush or an aerosol spray and after that it is coated with the DeoxIT Shield to improve the long term resistance to moisture. It is great stuff and works like a charm, it is much used by Hi Fi fanatics and electronic organ restorers plus it is very effective on PC's with contact problems like on the memory connections.
Regards,
K-BIKE

    

8Back to top Go down   Tachometer stops early Empty Re: Tachometer stops early on Sat Oct 19, 2013 10:20 pm

smithy

smithy
Life time member
Life time member
@K-BIKE wrote:Hi All,
Just to clear up a misconception in the previous post by Smithy there is only one brand of DeoxIT, it is made by Caig in the US and it available in several formulations, it is not phosphoric acid based and it does not need to be washed off nor neutralised. It is put on with either the small bottle with the little nail polish brush or an aerosol spray and after that it is coated with the DeoxIT Shield to improve the long term resistance to moisture. It is great stuff and works like a charm, it is much used by Hi Fi fanatics and electronic organ restorers plus it is very effective on PC's with contact problems like on the memory connections.
Regards,
K-BIKE
Sorry if I have misled anyone , but I have used many brands of Deoxit . It is a metal conditioner and will remove corrosion or oxidation  , and will need to be neutralized with metho. I haven't used the Deoxit your talking about , but it does sound good. There are many forms of Deoxit branded phosphoric acid based products on the market from 500ml to 20ltr containers.

 Smithy  


                                         Tachometer stops early Deoxit11


__________________________________________________
87 K100rs : Vin 9462 
86 K100rt : Vin 9901
Naked
98 K1100lt: Vin 8044
    

9Back to top Go down   Tachometer stops early Empty Re: Tachometer stops early on Sun Oct 20, 2013 4:26 am

K-BIKE

avatar
Life time member
Life time member
Hi Smithy,
Thanks for showing us the can it is DE.OX.IT rather than DeoxIT all one word with no dots. The DeoxIT site is http://www.caig.com/ it really is great stuff for electrical contacts DeoxIT D5 and DeoxIT S5 are the two most commonly used. 
Regards,
K-BIKE

    

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