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Makes And Models => Zero Motorcycles Forum | 2013+ => Topic started by: quixotic on April 13, 2016, 08:51:24 AM

Title: RPM on the speedo?
Post by: quixotic on April 13, 2016, 08:51:24 AM
I didn't have my glasses handy at the time, but is the main analog indicator on the 2013 S a tach?  (I just did a demo ride, following the tech on his bike, so I didn't pay attention to what the dial was doing). 
Title: Re: RPM on the speedo?
Post by: BrianTRice@gmail.com on April 13, 2016, 09:28:27 AM
Yes, it's a tachometer.
Title: Re: RPM on the speedo?
Post by: protomech on April 14, 2016, 01:03:19 AM
On the 2012s this was a speedometer. They just swapped the backing label, since on a direct wheel RPM and motor RPM are directly linked :)
Title: Re: RPM on the speedo?
Post by: acacia1731 on April 14, 2016, 01:48:36 AM
On the 2012s this was a speedometer. They just swapped the backing label, since on a direct wheel RPM and motor RPM are directly linked :)

I was wondering about that - whether the speedometer was based on motor speed, or an actual wheel measurement.  If it's based on motor RPM, then any gearing, wheel, or tire change will decrease speedometer accuracy.
Title: Re: RPM on the speedo?
Post by: quixotic on April 14, 2016, 08:20:21 AM
So If I was digitally challenged, I guess I could put some numbered stickers on the face of the tach in order to get an analog speedo.
Title: Re: RPM on the speedo?
Post by: grmarks on April 14, 2016, 03:35:39 PM
On the 2012s this was a speedometer. They just swapped the backing label, since on a direct wheel RPM and motor RPM are directly linked :)

I was wondering about that - whether the speedometer was based on motor speed, or an actual wheel measurement.  If it's based on motor RPM, then any gearing, wheel, or tire change will decrease speedometer accuracy.

Most car speedos work off the gearbox output shaft, so any change of diff ratios or wheels size makes the speedo inaccurate.
Running off the motor RPM means you don't need a speedo cable/wires to the front (or back) wheel.
Title: Re: RPM on the speedo?
Post by: MrDude_1 on April 14, 2016, 04:25:20 PM
I assume you can correct the wheel size somehow?
Title: Re: RPM on the speedo?
Post by: morimaxx on April 14, 2016, 04:48:42 PM
For 2013 S:

To recalibrate the speedo.
-Start up the bike and wait for the speedo to complete its self test.
-Hold down both the adjust and select buttons for 5 seconds until the display shows a 4 digit number followed by a 2 digit number.
-Scroll through the digits using the select button and change them using the adjust button.

As an example, to calibrate the speed if you are going from a 28 tooth pulley to a 25 tooth pulley, you will multiply the 4 digit number by 25/28 and enter that as the new value.

found here: http://electricmotorcycleforum.com/boards/index.php?topic=2259.msg8351#msg8351 (http://electricmotorcycleforum.com/boards/index.php?topic=2259.msg8351#msg8351)