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Old 04-28-2009, 12:55 PM   #1
Max Kool OP
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[feeler] recalibrated speedo ring for BMW G650X Series

All,

on the BMW G650 series the speedo has an error of over 10%. 120 kmh on my GPS meant something like 135kmh on the speedo. I found this to be very irritating. To solve this I had a friend of mine lasercut an new speedo rotor for the BMW G650X with 44 instead of 48 slots.

Later on I found on the Xchallenge you can set the speedo on a different wheel diameter (of the Xcountry to be precise) and make it spot on accurate. However, on the Xmoto and the Xcountry you can't, as it is already set on 17", and you have no smaller choice.

Just recently I had someone with an ABS equipped Xcountry test this speedo ring, and they proved to be nigh on perfect. Speedo error withing 2%, and the ABS still works flawlessly. Here's what they look like:



Left stock, right custom recalibrated ring.

The rings come in galvanized steel and wont rust. the first series (well "series", there were only 10 or 11 of them) have all been sold. My question to you all, are any owners of a BMW G650X interested in one of these. Price will be between $40,- and $50,- including shipping worldwide, depending on the amount I need to have made.

Interested? Please let me know and I could pull off a new series.

Max Kool screwed with this post 04-29-2009 at 04:34 AM
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Old 04-28-2009, 01:45 PM   #2
tedder
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sounds cool! doesn't that change the odometer/tripmeter/gas computer calculations, though?
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Old 04-28-2009, 01:51 PM   #3
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It does, actually it makes it more accurate.

(the little Beemer might be economic, but it does eggarerate a little)
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Old 04-28-2009, 02:23 PM   #4
rc mad
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if that works on the f650gs bike your on to a winner. I'll take on if it fits

the f650gs bikes have a 17" rear, where the speedo sensor is so it should work, both bikes have a 130/80 R17 rear.

So its just the pcd of the holes and i can't see them being much different.
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Old 04-28-2009, 02:59 PM   #5
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Just checked the bike, front abs sensor is the same as the one in the pic but the rear one's different. Three hole mounting and it's not flat.


guess it won't work then
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Old 04-28-2009, 03:03 PM   #6
slide
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I am 90% sure the speedo calibration can be user set (you set the diameter of the tire in mm) somehow. That's on an x-Country. I would suppose a dealer may have the documentation on how to do this.
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Old 11-10-2010, 12:27 PM   #7
ridin gaijin
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OK, ordinarily I'd feel dumb about this post, but I've owned my X-Co for about 5 days, so I'm a n00b.

What's involved in replacing the stock unit--how much of a PITA in terms of time and sweat? Also, what do we do, lay the bike down on a nice blanket on its left side or something? (With the Tiger there was a threat of oil seeping into the cylinders if left down for too long.)

Thanks guys--rg
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Old 11-10-2010, 01:02 PM   #8
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Quote:
Originally Posted by ridin gaijin
OK, ordinarily I'd feel dumb about this post, but I've owned my X-Co for about 5 days, so I'm a n00b.

What's involved in replacing the stock unit--how much of a PITA in terms of time and sweat? Also, what do we do, lay the bike down on a nice blanket on its left side or something? (With the Tiger there was a threat of oil seeping into the cylinders if left down for too long.)

Thanks guys--rg
Assuming you're talking about the Speedo Ring on the back wheel.....

Just remove the wheel, remove the old unit, bolt up the new unit, replace the rear wheel.
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Old 12-08-2010, 04:07 PM   #9
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As a set of SuperMoto wheels for my XChallenge will most likely be a Christmas present to myself, someone correct me if I'm making a wrong ass-umption here. I'm keeping the dirt wheels, so I'll essentially have two bikes!

By setting the computer to 17" thanks to Max Kool's procedure, I will:
1) have the stock wheel set 21/18 with the stock ABS ring
2) use the speedo ring from this thread on the 17/17 rear wheel

Sounds like both would then be reporting at least close to the correct speed, given that the stock wheel set is being corrected by the computer and the SuMo wheel set is being corrected by the ABS ring?

I'm also thinking I should buy an XTank at the same time... If only to save on shipping...
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Old 02-01-2011, 10:31 PM   #10
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Quote:
Originally Posted by mr7q View Post
As a set of SuperMoto wheels for my XChallenge will most likely be a Christmas present to myself, someone correct me if I'm making a wrong ass-umption here. I'm keeping the dirt wheels, so I'll essentially have two bikes!

By setting the computer to 17" thanks to Max Kool's procedure, I will:
1) have the stock wheel set 21/18 with the stock ABS ring
2) use the speedo ring from this thread on the 17/17 rear wheel

Sounds like both would then be reporting at least close to the correct speed, given that the stock wheel set is being corrected by the computer and the SuMo wheel set is being corrected by the ABS ring?

I'm also thinking I should buy an XTank at the same time... If only to save on shipping...
I converted mine to SuMo wheels also and have wondered about the speedo error. Would the new ABS ring fix the error with my 17's?

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Old 02-02-2011, 01:05 AM   #11
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Yes it will, if you ALSO set the speedo on the smaller rear wheel circumference.
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Old 06-01-2012, 04:58 PM   #12
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Stock take off

To anyone that has replaced their ring,
Can I borrow your stock ring for a proof of concept test?
I'll pay postage both ways, via USPS, if you're willing to loan me yours.

I've replaced the 21" front wheel on my F800GS with a 17" and the original ring sets a wheel speed code.
I'd like to try a rear ring off of your G650 X-Country to see if the bolt pattern matches up
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Old 11-17-2012, 02:51 PM   #13
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Thumb It worked

Big thumbs up to Erik and his recalibrated sensor ring.
After switching wheel diameters from 21" to 17" on my F800GS the abs would fault out at high speeds.
By slowing down the wheel rotation signal with Erik's ring my abs now remains online.
Many thanks.
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Old 11-12-2014, 01:07 PM   #14
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question concerning abs

Looking at getting a xcountry- so having a speedo ring doesn't mean it has abs?
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Old 11-12-2014, 03:31 PM   #15
Max Kool OP
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Speedo ring in both wheels? Defo ABS
Speedo ring only in rear wheel? No ABS
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