Tachometer For Motorcycle Resource
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Tachometer For Motorcycle Resource in Q&A
how do you take apart a motorcycle tachometer? i need to put the guts from another one in it but i cant get the case off please help.

maddog replied: "you cant,they are sealed units,the trim ring around the glass holds it all together,the only way to get it apart is to destroy the trim ring,then it cant be sealed again"

phantomfill replied: "with a hammer but putting it back together is hard"

bikinkawboy replied: "On the older ones you can, but you have to be very careful. The metal trim ring is what holds things together and is rolled at the back. You'll need to take a very small flat bladed screwdriver, put the tip under the lip of the ring on the back side and pry it up just a bit. Proceed around and around the ring a number of times, prying the lip up a bit more each time. Do it all an once and you'll stretch the metal and never get it to fit again. Pry it up only as much as is needed to get it off. When it comes to working on such instruments, patience is a virtue."

Does anyone know how to restore/reburbish Honda Motorcycle speedometer tachometer gauges? I have a 1973 Honda CB350, and the face of the gauges are starting to fade. Does anyone know how hard it would be to take them apart and rebuild them? Or, better yet, know of a business I could send them to to replace the faces and the glass?

michaelsmaniacal replied: "For instructions on how to dissassemble your guages, check out http:kzrider.com/content/view39/11/ I know they show Kaw guages, but the operation is exactly the same. The other idea is to replace the guages altogether. I just installed a speedo and tach I got from JC Whitney's online catalogue. They're a bit smaller than the stock guages, but hook right up, are illuminated, and work great! Oh yea, they're only like 39.95 US$ each. E-mail me @yahoo.com if you need a pic of them installed."

blastabuelliac replied: "I know that it is hard to take them apart because they are made to not be taken apart. Everything is in there permanently so that the numbers can't be changed. But that doesn't mean that someone hasn't figured out a way to restore them. I tried to find someone on the Internet to answer your question but I've failed."

Dogbettor replied: "In 1973 Honda sold more cb/cl 350 motorcycles than ALL the other motorcycle manufacturers sold motorcycles COMBINED. The CB, CL, and the SL all had the same guages. I don't know about a refinish but replacements are available all over. Call 610-521-6700. Ask for a nice set. Also can fit 72, 74, 75."

does anyone know how to install a tachometer rpm gauge on a motorcycle? i bought a 2005 kawasaki eliminator 125 recently. it does not have a tachometer rpm gauge and i'm wondering if i can install one on it.

永遠にL2R R2L replied: "Yes you can install one, But you need to find out what kind it can use, Mechanical or electrical Tachometer Mechanical uses a cable like a speedometer & electrical is obvious."

Blitzpup replied: "There are a couple of 'non-traditional' Tachs on the market now... the only one I can recall at the moment is called the 'Tiny Tach' , I am sure a search would turn it up for you. Probably other ones similar to it as well. These are reportedly very easy to 'install'."

MotoMan replied: "Here are some sites that have tachs that could be used on an eliminator. But I don't think you really need a tach. Ridden normally there would never any time when the engine would anywhere close to over-reving. How else would ride a mini cruiser? "

What's the rpm redline on a Vulcan 500 motorcycle? Would an aftermarket tachometer be a viable option? Honestly, I think cruisers should come with tachometers just like sportsbikes. I know my 2005 Vulcan 500 has the same engine as the Ninja 500 and sometimes I would like to push it to its limits. I am afraid I might blow the engine if I overrev it. So I am planning on installing a tachometer but I need to know the redline. Please help.

bigboy_dada replied: "You can't over rev they have a rev limiter"

Ellwood replied: "You won't over rev your engine. It has a rev-limiter so you don't blow it up. You should actually run up to it once in a while just to clean carbon deposits from the engine. You will find the rev-limit when in gear and run the throttle wide open...preferably not in first gear. When you do this you will come to a flat spot where the bike won't go any faster or your throttle is open all the way."

Using the tachometer to change gears for a motorcycle.? I'm buying a Kawasaki Ninja 250r, and just wanted to know at about what point on the tachometer should I begin to switch gears? Basically, when the meter hits so many RPM's, when would you recommend switching into a higher/ lower gear?

braun replied: "it depends but normally if you want fuel efficiency then go shift around 3000 and if you want top speed and acceleration go for around 6000"

Jay P replied: "Considering the smaller displacement of the lil' Ninja, I'd use somewhere between 3-4K as a general guideline for upshifting. For downshifting, bring the the engine speed down further and blip-the-throttle to match the rev's of the lower gear. This takes a bit of practice to get it right."

Dan W replied: "Anywhere from 2K-redline, but it;s done more by feel and sound."

Motorcycle TACHOMETER needle clith? i have a motorcycle that starts up fine and runs great besides the fact that at idle the motorcycles TACHOMETER goes the needle bouces around to about 4000rpm but dosnt rev the bike up when the needle bouces around its drops all the way down and kills the engine when the needle tweaks like it does the bike dosnt rev of on its own unless i give it gas my only problem is why is the needle tweaking out and killin the bike?????????????

Jancie replied: "You don't mention if your tach is mechanical or electronic. Since you say the engine does not rev but the needle bounces around like crazy, I am guessing electronic. When ever asking a question we need the year, make and model of the bike in question, as well as the specifics on the problem. Since I do not know if I am dealing with a moped or a "Boss Hoss" I can't formulate a guess based on the supplied info."

Firecracker . replied: "First, the needle doesn't kill the bike. It's just a meter that's supposed to show what the engine is doing, it doesn't control anything. It should drop down when the engine dies. You don't say what bike, that's real important. If it's an electronic tach, you probably have an electrical problem of some sort. If it's mechanical, it's a bad cable or a stripped drive gear."

motorcycle tachometer (rpm's) bouncing everywhere? when i take a ride for a little, it starts to bounce around like crazy. also the engine gets strong and weak, strong and weak... head lights gets weak and comes back to normal. whats the problem? do i have to change spark plugs? or is it a weak battery problem? or etc.. its a Kawasaki NInja 250r 2005

Mad Jack replied: "Sounds like a bad battery connection or a bad ground. Spark plugs would have nothing to do with the headlight getting dim then bright. A weak battery would be worse when you first start the bike, not after it has been running a while. I ride a different make of bike, but it is notorious for a similar problem. I frequent a forum for my bike. The recommended repair is cheap and simple. They recommend using star washers on both sides of the battery connections. Use 2 washers on each connection, one on each side of the cable. About a 50 cent fix and a little time."

TXm42 replied: "Sounds like a voltage fluctuation to me. Prime suspect for such a condition would a Faulty Voltage Regulator. There's other things also,,,but they all rank pretty far down the "Top 10 List of possibilities" Good chance the battery is Weak or damaged. Normally a battery can absorb a substantial voltage swing,,,and sort of Buffer it due to the battery being steady output. A bad Regulator can damage a battery,,,so that adds a bit of suspicion. So,battery to be tested also. Things like Bad Connections,,,corroded or loose wires can also cause symptoms like your bike's having. But the place to Start Checking is the Regulator and Battery. Then go from there. Good Luck,,,"

how would you hook up a tachometer on a 50cc motorcycle? can anyone help??? its a RCM moped/motorcycle... its only considered a motorcycle because u have to shift.... please help!!!!

guardrailjim replied: "There shouldn't be a problem, but call first to make sure."

Connect honda Tachometer to a Kawasaki motorcycle engine? I have a tachometer from a 1983 honda 750 shadow motorcycle. I have tried connecting it to a 2006 Kawasaki Vulcan 900 motorcycle engine. The problem is that although both engines are 4 cycle/stroke the honda uses a dual fire ignition system ( spark plug fires on both compression/power stroke and exhaust stroke. The Kawasaki is designed to fire on the power stroke only. No surprise that when connected to the negative side of the kawasaki coil the Honda tach. registered only 1/2 the actual RPM's. I went online and found a electrical diagram designed to correct this, it didn't work. The diagram showed a wire coming from the negative side of each Kawasaki coil. Each wire passing through a 1N4007 diode (Radio Shack) and, also, a 100K Ohm resistor then connecting together and continuing to the tachometer. Tachometer will not work at all with the described wiring adaptor connected to both coils, disconnect from one of the coils and again I get a reading but only 1/2 of actual rpm, Any suggestions as how to fix my peoblem? Thanks.

bikinkawboy replied: "I'm no electronics genius, but I wonder what the resistor is for? Unless Honda uses a resistor in conjunction with their tach. I know Kaws but can't say for sure on "newer" Hondas. I can see the diodes to keep both coils from firing at the same time and before I read your complete post I was thinking along the same lines as what you described. Right now I'm stumped, maybe there's a Honda expert out there that knows Honda tachs."

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