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Discussion Starter #1
Hello everyone.
I'm new to riding in general and have a 2015 C50T. I've noticed that my speedometer tends to read out about 5MPH over the speed that I am actually traveling at. Is there a way to adjust this? Not sure if its just the angle I am viewing it from or what, but I'd like it to be an accurate reading instead of guesswork.
 

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Yes, the speedometer is in fact inaccurate. There is a product on the market called a speedo healer but it's very expensive and has limited functionality. The other option is to pull your speedometer apart, pull the needle off of the gauge cluster and advance it to 5 miles an hour and that way it will at least indicate your true speed. Otherwise you just have to live with the fact that it's an inaccurate speedometer.
 
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Discussion Starter #3
Yes, the speedometer is in fact inaccurate. There is a product on the market called a speedo healer but it's very expensive and has limited functionality. The other option is to pollear speedometer apart pull the needle off of the gauge cluster and advance it to 5 miles an hour and that way it will at least indicate your true speed. Otherwise you just have to live with the fact that it's an inaccurate spit all met her.
Thank you for the response. I will take a look at the assembly PDF's to see how difficult it may be to take this apart. If its a PITA I might just leave it be.
 

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I've owned four bikes and they've all been of about the same amount. I just don't look at the speedometer. Out of sight, out of mind. Right?
 

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Discussion Starter #5
I've owned four bikes and they've all been of about the same amount. I just don't look at the speedometer. Out of sight, out of mind. Right?
Makes sense. Typically I am riding with my club anyway so it doesn't really matter, more of an OCD thing when I drive past one of those digital MPH signs and see that I'm doing 5MPH less than I thought I was. I guess its better to be moving a bit slower than I thought rather than too fast? (depending on who you ask I guess :wink2:)
 

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The speedo being 5-10% "optimistic" is pretty common on most motorcycles and has been for decades. Yamaha sportbikes are notorious for this, people call them dream-o-meters since they tell people their R6 does 185mph. My Valkyrie and TW200 are the same way. It's not an inherent inaccuracy, it's set that way deliberately. However, the odometers are very accurate, and calibrated differently than the speedometer even though they have the same signal. Essentially, the speedometer readout deliberately exaggerates a bit, while the odometer counts true. (it would be illegal for the mileage to run up faster than actual). I used a speedo-healer on my old Z1000 and found the factory error was about 7%, but I'd also lowered the gearing which made the error more like 13%. With a -13% input, the dash speed was bang on when compared to a GPS- but the odometer routinely read 10-12% less than everyone else's on group rides, and less than actual when compared to the same GPS.


I wouldn't mess around with trying to disassemble the speedo cluster. There is no adjustment or anything like that. If it really bothers you I'd get a Speedo Healer, although IMO they're pretty pricey for what they are. The other option (sometimes) is to get a slightly oversize front tire- go to the next profile up, if available. This slightly increases the circ. of the wheel, and can help pull the speedo a little closer to reality.
 

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On the highways, the speedometer on my C50 reads a reliable 6 mph faster than my actual speed as checked against my GPS.

So I just ride 6 mph faster than the speedometer indicates. If I wanna go 65mph, I just put the needle at 71. Done.
?

I'm used to it by now.
 
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In all of the vehicles I own -- two bikes, two automobiles and a pickup truck -- the speedos run slightly faster than the GPS-checked speeds. An uncle of mine, now deceased, was a design engineer for GM. He once told me that speedometers were considered defective only if they indicated slower than actual speed, and that indications up to 10% faster than actual speed were considered accurate.
 

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A lot of these things are purposely jacked with.
Not too long ago I replaced the fuel pumps/filters/float in a Ford pickup's tank.
Looking at the mechanics of the gauge sender, there's about 15 increments on the board.
The first 5 are connected to the first trace on the board, which will cause it to read full.

So if you ever wondered why your vehicle reads full longer after a fillup.....
 

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You can use a GPS App to track your speed. There are designated speedometers and some that provide directions and speed. I like to use the GPS to know how off the speedometer is and I just keep that in mind. More time riding, less time fiddling with fixing the speedometer.
 

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That would work, and as a bonus you get a sweet looking guage. :wayhappy:
 

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My solution: https://www.volusiariders.com/47-custom-mods/414522-speedometer-recalibration.html

I don't know about your bike but my M50 speedometer was easy to disassemble and reassemble. The needle came off easily using a table fork.
That's pretty neat. I hadn't heard of custom faces just with all the numbers shifted ~10% down. I'd seen entirely custom replacement gauges, but these are always $$$$ and are generally for Harley's, since they've used the same gauges for decades. That way you still get an accurate tripmeter/odometer as well.

Might ask if they can do one for my Valkyrie. I've heard of people disassembling the gauge and fiddling around with the internals and getting some success with adjusting how it reads, but I'd also read of several people doing this and ending up with FUBAR'ed speedo's that are either dead or wildly inaccurate now, so been hesitant to try and mess with it (talking a mechanical cable drive speedo in this case).
 

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Discussion Starter #15

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You mean, you actually look at your speedo? I try to look at mine as little as possible, only if I see a law enforcement officer, then I usually give the brakes a little tap and give them a wave. 5 MPH off isn't much of a surprise, most speedo's, not just on motorcycles, are inaccurate and they tend to get worse the faster you go.
 
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