I have a koso tachometer (rev indicator) for 12 volts. and there is no users manual inside the box,, where to download an instruction manual? the wire on the tacho is red black and green.. i have put the green wire on the ignition coil the red on the positive of the battery the black was on ground when i turn on my yamaha crypton z, the needle doesnt move.. i put the green wire on the headlight. the needle move but the RPM is so high... please help me to find users manual or teach me how the wirings are.. tnx

Ask the maker direct. It is nowhere to be found online. Sears is full of doom and gloom. No battery cover with a small screw hold it on?

https://www.searspartsdirect.com/model/32gq2a0k8i-003107/starrett-d34-16-home-parts

It should be here

https://www.google.com/search?q=starett+digitape+replace+battery

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The Mishto 165 litre 12 volt fridge may not have a fuse box. However, there may be a fuse located on the power cord or near the power source for the fridge. If you cannot locate the fuse, it is recommended to refer to the user manual or contact the manufacturer for assistance.

koso , have great online instructions , do a google search , .... if you need to know your bikes wirring , then another search for wiring diagram will help

I really cannot tell you how to do that. You need to follow the instructions that came with the tachometer.

Please note: I would be very cautious about connecting aftermarket equipment into your computer input or output circuits. These things have been known to cause all kinds of drivability problems as well as make it impossible to pass an emissions test (if it is required where you live).

I have personally seen aftermarket add-on equipment cause everything from engine cylinder misfires to transmission shifting problems to engine stalling and no-starts. I do not recommend using any at all. However, there are usually no problems created by "stand alone" accessories that are powered directly from the battery and do not require splicing into any of the computer circuits.

My professional recommendation on this is that if you think you need a tachometer to operate your vehicle, or you just like the looks of a tachometer bouncing up and down, then you would be money and headaches ahead to buy a vehicle that is equipped with a tachometer from the manufacturer - you may be opening a can of worms that you do not want.

This is just my opinion based on 37 years of experience diagnosing and repairing automobiles (and having to clean-up aftermarket add-on messes) - do with it as you wish.

Hi, check the fuse for the headlight after shutting off your motorcycle.
There is usually a fuse box under or just near the seat area. Sometimes it is located adjacent to the motorcycle battery. Check your user manual for the fuses location.
If that fuse is OK, remove the headlight element and remove the headlight halogen lamp by gently removing the wiring plug and rotating the halogen lamp that is inside, so you can inspect it for damage. A blown halogen lamp is usually indicated by a white or dark spot inside the glass lamp.

If you have a multimeter set it to Ohms and see if you can get a circuit thru the pins on the rear of halogen lamp before re-installing the lamp. There will be 3 pins - one is a common, one is the low beam, and the other is high beam. You should get continuity using ohms thru each separate pin to the common pin.

Make sure you remove any greasy spots on the halogen lamp before you put it back, as this causes hot spots on the glass and is a common cause of early failures of halogen lamps.

If you are comfortable measuring 12 volts DC with a meter, check that you have 12 volts DC at each pin on the harness which connects to the halogen lamp. Your ignition key will need to be turned on so that indicators and horn etc are all powered up. You normally shouldn't have to have your engine running to check power to your headlight, but it is possible that you may need to do so.
There will be 12 volts on 1 pin only and when you change to high beam that pin will then go dead and the other pin will then have 12 volts DC.
There is also a small chance your headlight relay is bad or has a loose connection. If you know what you are doing it should be easy to locate the headlight relay, otherwise take it to a reputable auto electrician or motorcycle repair shop.
Cheers,Steve PS Please vote for my answer or give me a testimonial if I have helped.

the engine has a rev limiter inbuilt,so after 6250 revs it will cough and sputter.the rev counter is for people who drive to strict rev limits to conserve fuel,and the obvious drivers who drive to the max power/engine revs for "fun"most men drive to the "sound" of the engine,so a rev counter is excess to requirements....save your money.(once he gets his "no claims discount" down he will buy a bmw anyway.........)
regards
geoff
England

it sounds like there is toooo much current going through your system, check how much voltage comes to the indicator when you rev it up with the multimeter if more than 13.5v check regulator

the dash voltage egulator probably went bad. First,check the battery & make sure you have 12 volts,not running. Check it again running & you should see about 14.5 volts. If that's good,I'd replace the guage assembly.