Electronic Speedo driver solved

[Irishflyer]

Previous owner of my 96 Cal III had purchased some very nice Speedhut Gauges, but was having a hard time with the drive adapter to send the pulses.  I found an adapter on Amazon,  the DAYTONA Motorcycle Speedometer Conversion Adapter.  It threads right onto the speedo output on the transmission, and has three wires.  The instructions are in Japanese.  I looked up symbols for colors.  12v is Red, Output to speedometer is Yellow, and Black is ground.  $61 on Amazon.


anonymous image hosting


https://www.amazon.com/gp/product/B01A7VLTFQ/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1

Hopefully this helps anyone looking for a cut and dried solution.  It does have a pass through to drive a cable driven speedo as well, I am actually using it differently than what they intended, I turned it around and screwed it right to the output threads.  I will find a cap that is 18mm to seal it. 

[Kiwi_Roy]

Looks pretty fancy, I used a small magnet spinning in the square hole and a reed switch for mine, no bearings required as it spins in the original drive.

[dguzzi]

Do you know pulses per revolution? Or some way to match up accurately?

[Chuck in Indiana]

Thanks for that.  I've saved KR's sketch in my "Roy's Guzzi stuff" file in case I had to make one, but I'd rather just bolt something on and be done with it in my waning years. 

[Irishflyer]

Do you know pulses per revolution? Or some way to match up accurately?

Speedhut has a calibrate mode, as long as you have pulses, it can calibrate basically.  Drive to 25mph, hit save, and it extrapolates from there.  I'm not sure of Daytona's pulses per mile.

[AZRider]

My VDO speedometer has you drive exactly one mile while in programming mode, speed doesn’t matter. It counts the clicks in a mile and does all the math from there. I looked on my state Highway Department website and found a map showing all the posted Measured Miles, went to the nearest one and drove from post to post.

[Old Jock]

I had a spare sensor from MotoGadget lying around so incorporated it onto the rear brake mount where it reads off the disc bolts.



I chose the Speedhut over Marshall, I preferred the looks of the Marshall, but they were thicker and their pulse range more limited so I opted for Speedhut.

Speedhut is great, but I did find all the button press m'larky to calibrate it a bit of a PIA. Trying to sets the modes, get it to the correct speed then hitting the cal while trying to keep a constant speed via a GPS mounted on the tank was tricky and I had eventually to take my gloves off to do it. As I recall the problem was the speedo reverted out of cal mode after a given number of seconds, which was irritating.

All that said it didn't take long to do once I worked it out and it works.

[Zoom Zoom]

I noticed Amazon lists it as currently unavailable although I'm sure they'll get more.

If I remember, there was also a GM hall sensor that worked. I don't recall the application or cost though. Perhaps someone remembers.

I was thinking about posts like this providing helpful info. Some of this stuff ought to be added to the tips and tricks page.

John Henry

[Tom H]

The GM sensor is about $25 or so. The problem is that it does not have the correct size end to fit the trans.

Tom