Speedometer discrepancy
 

I thought I'd start a post about the Speedometer discrepancy on our US CSC Cyclone RX-3

It seems to be off quite a bit...

As for methods to make it closer to correct....

A larger front wheel (Probably a 21" to make up about a 15% error)

Or some kind of digital converter to vary the signal from the sending unit on the front hub.

Anyone have other ideals?


(I hate to think it's adding miles to my odometer that I'm not doing...when it reads 1,000 miles, we will have only gone 870...)

If it uses a magnetic pickup there may be a way to program it to read correctly.

It does use a magnetic pickup.....

Thanks for starting the new thread on an important topic, Huck. :)

I am going to check my odometer against a measured mile to determine its accuracy. If both speedometer and odometer are 'optimistic,' we might be able to find a find a box which adjusts the digital input for both. If only the speedometer is 'optimistic,' we will need to find a way to calibrate the Siemens microprocessor. ;)

My Trail Tech Vapor computer can be programmed for the circumference of the wheel. This input allows you to very accurately calibrate the speedometer on that computer. :) If we can figure out how to access the microprocessor in the Siemens speedometer, we might be able to calibrate it, also. ;)

Spud, did you buy a connector for the Siemens ALDL port?

No, I didn't buy that connector. ;)

The company 12 O'clock Labs sells a unit called the SpeedoDRD.

http://shop.12oclocklabs.com/index.p...&product_id=59

https://www.youtube.com/watch?v=iScrjr7FxDM

Here is a link to a review of the SpeedoDRD.

http://www.wrrdualsport.com/reviews-...s/97-speedodrd

I rode from Lawas to Papar via Keningau (in Sabah, Malaysia), and a quick check on Google Maps showed the distance to be 220km.

I checked my odometer upon refilling at Papar, and it clocked at 240km.

However, this is by no means a detailed test, merely an afterthought, after stumbling upon this thread.

But I believe the odometer is accurate, at least roughly, because on another route, the distance is about the same on my Zong as it is on my Keeway TX200G.

YMMV.

Thanks for posting your input, Jezzrite. :)

Your information indicates the speedometer is about 9 percent 'optimistic.' That is consistent with the information we are getting in the United States. :)

new zong
 

great news that device will prob fix our speedo problem. I still could use some help figuring where the 6 pin electrical box that came with the uprade dash goes. The usb an cig lighter plug right in to the 2 plugs that are between the stock dash and windshield.Also am still hoping csc shows where you mount the upper end of the spring for the centerstand ,,it appears you have to drill the frame ,,,but i'd like confirmation ,before doing so. Btw the box does say ''DC12v-DC5v /1A
/

I suggest you start new threads on both those topics, Fish. Better yet, I'm confident you can get quick answers if you call Ryan at CSC. :)

zong rx3
 

will do spud,,, i emailed them the same question.Tire question for you .did you use the xact size tires when you replaced the stockers ,,,while looking at 17'' shinko s our exact size wasnt listed in the one i wanted.

Please ask that question in the megathread, and I'll answer it over there. :) I bet other people might have the same question, and more people will find the answer there, than here. ;) The megathread is a nice gathering place for quick questions and general information. The tire information will get lost here, in a thread about speedometer discrepancy. ;)

http://www.chinariders.net/showthrea...13440&page=219