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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: broberg on January 10, 2016, 06:55:00 AM

Title: Koso DB-03 or other aftermarket gauges that have gear indicator
Post by: broberg on January 10, 2016, 06:55:00 AM

Hi!

Is there any one on the web (here or other forums) that has tried getting full functionality on an aftermarket dial? (Ie almost as the stock cluster but in a smaller format)

I found the DB-03 have lights and indicators for almost everything as the stock cluster has (I think, just made a quick check).
I'm guessing there will be quite a bit of tinkering getting it to work with the stock sensors, so that's why I'm wondering if someone have tried it?

http://www.koso.com.tw/products-detail.php?lang=en&id=982

(http://www.koso.com.tw/uploads/images/d7ea73eacf92a4a408497308240c2b61.jpg)

Title: Re: Koso DB-03 or other aftermarket gauges that have gear indicator
Post by: rbm on January 10, 2016, 09:42:14 AM

I've built circuits that convert the gear position switch on the K-bike transmission into a signal compatible with aftermarket gauges that have gear inputs.  My circuit has been tested with an aftermarket gauge sold on Ebay which includes a gear display.  Video below; watch the gear indicator.

https://www.youtube.com/watch?v=JtOjezntjKM (https://www.youtube.com/watch?v=JtOjezntjKM)

However, the Koso line of gauges don't have gear inputs; they calculate the gear number based on engine RPM, road speed and user programming (see Section 4-12 of the Koso installation/operation manual (http://kosonorthamerica.com/instructions/BA038000.pdf)).  As for detecting neutral gear (which you will need in any case), you have to do one of several things:

• use the circuit card I build (http://www.motobrick.com/index.php/topic,3421.0.html)
• use the TGPI board from inside your OEM instrument
• use a BEB v2 (http://maru-labs.com)
• build a simple relay circuit (http://www.k100-forum.com/t2856-wiring-an-acewell-speedometer) to create neutral from the TGPI switch

The Koso DB-03R fuel gauge is compatible with the K-bike fuel gauge if you perform the published modification to the sender (http://www.k100-forum.com/t9265-messing-with-the-in-tank-fuel-sender).  Most of the other signals from the K-bike should work with the Koso gauge.

Title: Re: Koso DB-03 or other aftermarket gauges that have gear indicator
Post by: broberg on January 17, 2016, 04:09:42 AM

Aahh I love it when people share their knowledge!
Thank you very much!

But I don't really get why you would have a "guessed" gear indicator as the Koso has, it sounds unreliable

Title: Re: Koso DB-03 or other aftermarket gauges that have gear indicator
Post by: pablooo on April 11, 2016, 10:37:36 PM

Quote from: rbm on January 10, 2016, 09:42:14 AM

I've built circuits that convert the gear position switch on the K-bike transmission into a signal compatible with aftermarket gauges that have gear inputs.  My circuit has been tested with an aftermarket gauge sold on Ebay which includes a gear display.  Video below; watch the gear indicator.

https://www.youtube.com/watch?v=JtOjezntjKM (https://www.youtube.com/watch?v=JtOjezntjKM)

RBM, Are you still making circuit boards? I have just purchased a speedo just like you linked and I have seen the link for this (http://maru-labs.com) but I never got a reply for the e-mail and such.

Many Thanks,
Pablo

Title: Re: Koso DB-03 or other aftermarket gauges that have gear indicator
Post by: Bluebrick on June 16, 2016, 09:33:02 PM

Hey broberg did you end up installing the koso db-03