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XT250 Serow Speedo to MPH #148749 08/23/20 12:01 PM
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ian640 Offline OP
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Hi All,

We have just acquired a 2010 model XT250 Serow, Japan market model. The speedo is in kmh. Anyone any idea how to change it to mph?

Thanks,

Ian.

Re: XT250 Serow Speedo to MPH [Re: ian640] #148753 08/23/20 02:59 PM
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peejman Offline
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Divide by 1.6? Remember the easy ones a estimate in between.

30mph = 50kph
40mph = 65kph
50mph = 80kph


This shall pass, be still and know.
2006 XT225, UNI filter, ProTaper bars, MSR handguards, SS front brake line, Shinko 241's.
Re: XT250 Serow Speedo to MPH [Re: ian640] #148762 08/24/20 06:06 AM
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Ben Online Content
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When I bought mine in 2007 from Bill Smiths in Chester, they sent the speedo away to a specialist, who opened it up and converted it. A friend who bought one shortly after couldn’t get it converted as the specialist had been raided by the police for clocking BMW speedos!
Heal tech list your bike.
https://www.healtech-electronics.com/products/sh/


2007 serow 250 from new, now gone to a new home. 2015 V-Strom 1000. 2016 KTM350 EXC-F
I want it , and I want it now.
Re: XT250 Serow Speedo to MPH [Re: ian640] #148763 08/24/20 07:29 AM
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ian640 Offline OP
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Thanks all.

We'll investigate the HealTech.

Cheers.

Re: XT250 Serow Speedo to MPH [Re: ian640] #148789 08/26/20 03:56 PM
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Az4x4 Online Content
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If I remember correctly some years ago Reggie bought a MPH speedo from the States and installed it on one of his bikes replacing the KPH speedo he had. You might check with him on what that conversion amounted to and how much it cost..


The voyage of discovery that truly matters is not in seeking new lands but in seeing with new eyes.
Re: XT250 Serow Speedo to MPH [Re: ian640] #149104 10/02/20 12:57 AM
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BillV Offline
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See this for some ideas. It won't correct the odometer but does allow you to get the speedometer dead on and/or with a dual MPH/KPH reading dial face.

I haven't dug into this but have always believed that my '95 was 100% mechanical. As best I know HealTech makes things for electronic speedos. I have one on my GSX-R1000. Or was the XT electronic by 2010? That 1.6 factor sounds like a gear in either the speedo or the front hub. Yamaha may not sell it but there might be hope if you dug around. The issue with HealTech and the GSX-R is that there's just one sensor for distance and speed. Suzuki supplies them with the odometer essentially dead on and the speedo reading high by around 7.2%. If you use a SpeedoHealer to correct the speedo, the odometer will then read low. I've been looking for a way to hack the cluster's internals to make both correct. But that's not a trivial matter.


1995 XT225 Cobra exhaust - Town & trail
2006 GSX-R1000 - Highway
Re: XT250 Serow Speedo to MPH [Re: BillV] #149105 10/02/20 07:23 PM
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Originally Posted by BillV
See this for some ideas. It won't correct the odometer but does allow you to get the speedometer dead on and/or with a dual MPH/KPH reading dial face.

I haven't dug into this but have always believed that my '95 was 100% mechanical. As best I know HealTech makes things for electronic speedos. I have one on my GSX-R1000. Or was the XT electronic by 2010? That 1.6 factor sounds like a gear in either the speedo or the front hub. Yamaha may not sell it but there might be hope if you dug around. The issue with HealTech and the GSX-R is that there's just one sensor for distance and speed. Suzuki supplies them with the odometer essentially dead on and the speedo reading high by around 7.2%. If you use a SpeedoHealer to correct the speedo, the odometer will then read low. I've been looking for a way to hack the cluster's internals to make both correct. But that's not a trivial matter.


The 225 is mechanical with a gear at the front hub. The 250 is electronic with a pickup in the transmission.


This shall pass, be still and know.
2006 XT225, UNI filter, ProTaper bars, MSR handguards, SS front brake line, Shinko 241's.
Re: XT250 Serow Speedo to MPH [Re: ian640] #149113 10/03/20 06:54 PM
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BillV Offline
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As may be of interest, the SpeedoDRD may be better suited to XTs with an electronic speedo. But beware of the pickup's waveform as it relates to compatibility issues, i.e. you're taking chances if it isn't specifically listed for the bike. Having said that, in the few interactions I've had with 12oclocklabs, he's been very helpful.

If you search for "speedometer pulses per mile", it seems that 8000 was once a standard of sorts. No idea if it applies to the XT.

The "best" way to correct it is to reprogram the eeprom. You can see this done on youtube for the odometer reading of cars. That's probably what the specialist in Ben's post was doing and the police are fairly sensitive to it (in the US it can run afoul of state and Federal law). But in addition to the odometer reading, there also are memory locations for the mileage rate, i.e. the pulses per mile. Such information is available (not widely) for the major sportbikes but probably not so for bikes like the XT.

Last edited by BillV; 10/03/20 08:24 PM.

1995 XT225 Cobra exhaust - Town & trail
2006 GSX-R1000 - Highway

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