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Post by scooterbumb on Jul 4, 2022 15:49:01 GMT -5
just bought a 2014 yamaha zuma 50cc with only 527 miles on it the speedometer is off by 5mph slow how do you fix it
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claydoh
Scoot Enthusiast
Posts: 172
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Post by claydoh on Jul 4, 2022 15:55:53 GMT -5
 Basically, you don't. Or replace it with something electronic with a wheel sensor. Or use a phone/GPS. As far as I can tell, it seems that many to most scooter speedos are inaccurate. There are a few posts about the topic in the forums here. I found them when I had this exact question about my scooter 
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Post by aeroxbud on Jul 4, 2022 16:05:18 GMT -5
It's designed to be like this.
I have never owned a vehicle where the speed reading is correct.
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pili
Scoot Enthusiast
Posts: 278
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Post by pili on Jul 4, 2022 19:44:06 GMT -5
Only option to fix the OEM speedo that I've seen is speedometer ratio adapters, but they're kinda bulky and not cheap.
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Post by aeroxbud on Jul 5, 2022 3:27:48 GMT -5
Only option to fix the OEM speedo that I've seen is speedometer ratio adapters, but they're kinda bulky and not cheap. Yeah we used to use those Speedo healers in the 90's. Converts Japanese import bikes from kilometres to miles. Also had the advantage of removing the speed limiter.  |
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Petro
Scoot Enthusiast
Posts: 149
Location: Gothenburg, Sweden.
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Post by Petro on Jul 7, 2022 14:54:50 GMT -5
just bought a 2014 yamaha zuma 50cc with only 527 miles on it the speedometer is off by 5mph slow how do you fix it Larger tire is the cheapest fix, I one´s had Pirellis P26 100/110/12 and my speedo was dead on. |
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Petro
Scoot Enthusiast
Posts: 149
Location: Gothenburg, Sweden.
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Post by Petro on Oct 17, 2022 15:23:53 GMT -5
just bought a 2014 yamaha zuma 50cc with only 527 miles on it the speedometer is off by 5mph slow how do you fix it Larger tire is the cheapest fix, I one´s had Pirellis P26 100/110/12 and my speedo was dead on. Correcting myself, cheapest fix is to push and move the speedo needle 5 miles under the zero... |
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Post by captincvmn on Oct 18, 2022 5:34:27 GMT -5
 i bought this one and morphed it to look like it belonged on my China Scoot dash board. It works well except for the damn clock, time won’t change. I have 3500 miles on it now. |
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Petro
Scoot Enthusiast
Posts: 149
Location: Gothenburg, Sweden.
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Post by Petro on Oct 18, 2022 16:33:01 GMT -5
i bought this one and morphed it to look like it belonged on my China Scoot dash board. It works well except for the damn clock, time won’t change. I have 3500 miles on it now. I bought two of them, one didn't the clock stay in memory and the other one didn't work at all... I wouldn't recommend them at all, not even mention them... Which I already did... 8/ |
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Post by repherence2 on Oct 20, 2022 16:28:08 GMT -5
just bought a 2014 yamaha zuma 50cc with only 527 miles on it the speedometer is off by 5mph slow how do you fix it
i "recalibrated" my speedometer on my chinese 2 stroke moped. i did it by removing the clear cover. lifting the indicator needle over the "0" pin and letting the indicator come to a rest, you get to see the offset from "0" (Zero), where the indicator needle will naturally sit. i marked that position with a sharpie by making a black dot on the indicator face. then i did to my best to gently pop the indicator hub off of the speedometer pin, to make sure it was free and capable of making adjustments.
as i cross over into an adjacent district from where i live, there is a radar speed limit sign that gives real-time speed. i use that sign to calibrate my speedo. in the beginning, from you starting sharpie dot/mark, you extrapolate 5 mph on the scale/arc and you advance the indicator by that amount/degrees and then press the indicator hub back onto the speedometer pin. make a few runs and see how it correlates between your speedo needle that the readout from the radar sign and make corrections accordingly.
...it can be done. **I "calibrated" mine to 45 MPH on the radar sign, beyond that i have no clue of tracking accuracy.**
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