cbr digi dash

[Jockney Rebel]

i m considering buying a cbr f4i dash is it hard to splice into my ageing wiring loom

[ozkat]

You will need a sensor for the speedo pickup, im pretty sure it goes on the end of the crank. Not an easy thing to do. I may be wrong tho. I thought i was wrong once but i was mistaken :D

[Jockney Rebel]

cheers oz
i thot it was cheep! just fancied havin some bling digi instruments,its also from a U.S. model so speedo reads in MPH[I like MPH ! I understand mph ]

Isn't the sensor located near the rear wheel, on the swing arm or something, on the f4i?

All you should need Frankie is a Hall effect sensor (coupla $ from Jaycar etc), attached to the swingarm or front fork, and a magnet, attached to the wheel. Every time it passes the sensor it will send a pulse to the speedo. The speedo will have a small processor in it which calculates the speed based on the circumference of the wheel and how many times the wheel has turned. Calibration may be an issue, the speedo will be set up for the f4i wheel/tyre combo.

Have a look at current bicycle speedo's, that's how they work.

PS a lot of digital speedos have the ability to convert from mph to kph, you just have to figure out if that one does, and how to set it.

[Jockney Rebel]

ta chalkie the guys only lookin for 100for it so i might give it a go worst way itll make an interestin ashtray

Anyone know of any sites specialising in these bikes?

If I can get the spec sheets/descriptions/diagrams for the dash I might be able to sort out instructions for making the necessary adjustments/sensor equipment. If I used a PIC chip to record the speed in K's, from the sensor, then send a modified signal to the dash so that it display the actual kph reading. Could probably do it anyway, but the extra info would make it easier.

The basic principle is that the 'computer' in the dash counts the number of times the sensor sends a pulse, then calculates how far the bike has travelled, based on tyre circumference, then calculates the speed, based on how long it sample the inputs for. The PIC chip would do the same, then convert the speed to kph and send appropriately timed signals to the dash computer. Voila the readout is kph, even though the dsah would still 'think' that it was miles.

[Jockney Rebel]

wicked ...sounds like a plan .........