Darrsi: That's the right thread.
Risticuss: I haven't intentionally hidden how to do any of this stuff - it's just that no-one seemed to be interested in fitting alternative front-ends on their bike, so I never elaborated any further on my R6 fork thread.
To replace the standard speedo sensor unit, use one from either an FZ-1 or FZS1000. Actually there are other Yamahas the same but to date they're the only ones I'm aware of that work. You do however need to extend the wires so they're the same length as the ones on the standard unit (if you want to place it on the front wheel).
Tommy: Not sure if I can explain this well but will have a go...I'm sure someone else can finish it off for me (possibly Muddybuddy).
Inside the standard speedo unit (at the front wheel spindle area) is that sh1tty wee two-pronged hollow metal unit that breaks on a regular basis every other time you change the front tyre
The two prongs where they fit into the front wheel slot are the BIG clue to all this. Those two prongs moving along with the wheel send signals to the clocks etc where speedo information can be estimated.
The replacement speedo sensors named above do something similar, but usually operate via the front sprocket on their parent bikes.
Both Muddybuddy and myself raised the height of two brake disc bolts a couple of millimetres by inserting small steel washers underneath them. As it's a six-bolt disc bolt pattern for the likes of an R1 / Fazer 1000 front wheel, it worked out very handy, because using two of the bolts facing 180 degrees away from each other effectively emulated the effect of the two sensor prongs.
So, if you place the replacement speed sensor the correct height over the disc bolt area (lots of fiddling), only two of the six metal disc bolts will 'activate' the speed sensor. This will then send an accurate reading to the original speedo clocks / TPS blah blah blah. And of course allow you to fit any front-end you like to the Fazer
Look closely at the 3rd picture down on my R6 fork thread:
http://foc-u.co.uk/index.php/topic,15854.msg181989.html#msg181989 You should see the revised speedo sensor bolted in place via the lower caliper mounting hole and 'hanging' over the brake disc bolts. You should also see the two raised disc bolts at about 11 0'clock and 5 o'clock if the brake disc were a clock face. It's these two bolts rotating past the FZ1 speed sensor that activates the signal sent to the clocks etc and emulates the original speed sensor effect.
Topic: Speedo drive query (Read 3045 times)
