Speedo Not Working/No Rear ABS/No TCS?

[CRAKALAKIN213]

Having a bit of a problem.

Changed out the rubber for an upcoming track day (already registered and paid for with no possibility for refund) and one of the rear bearings/spacers (right side) didn't go back in when assembled (long day and simply forgot it existed.) Had the bike on the rear stand and idled it in first to check chain and everything was okay. Bogged a little on clutch release and stopped dead when clutch pulled in. Turns out the rear brake caliper mount was grinding away on the rear disk. After many calls of nobody able to get it to me on time, I reluctantly picked a good condition used one up on ebay just so I could run it on track. Brake goes on fine, and after triple checking, I run it at idle on stand and all seems well.

Here's where it gets weird. Ride the bike to work as a "shake down" before packing it up at the end of this week to scrub in tires, make sure everything works as it should (changed levers and pegs too), etc. That's when I notice my speedometer was reading 0. Thought it was strange but then it starts jumping around between 0, 4, 5 mph when I'm easily doing highway speeds. As the ride progresses the speedometer is throwing out higher numbers but changing twice a second at random between 3 mph and ~55mph despite doing estimated 70-80mph. When I get to some local roads and stop signs I go to brake as I usually do, downshift/engine brake passionately and use only the rear for the last bit. I notice that the ABS never fired and the wheel locked a bit. Double check at next sign and sure enough I can lock the thing at will. Now, I like to think i have a good sense for what the maximum acceleration the rear can take without slipping or lifting the front wheel too much so I can't say for sure that the TCS doesn't work, but I gave it a few strong starts and it never interfered. did 80 or so miles round trio and this persisted the whole way. ABS light lit up solid, speedo having a seizure, and for some strange reason I kept backing it into some turns , but no codes thrown.

Well to make a short story long, I haven't gotten to work on it yet but I recall seeing that another bolt on the caliper mount bracken did get contacted. Thought it to be a caliper bolt at the time, but now thinking it could be the speed sensor mounting bolt. Not sure if the speed sensor was hit or if debris is in the way and interfering with a proper reading (remember, as I rode a bit on the highway, the speeds it was showing did go up more and more until 55). Anyone have a clue what it is?

Side note, new wheel speed sensor from kawi is back ordered 4-6 weeks, fleabay is from italy and that's soonest arrival on the 27th but track day is on 25th. Have to pay even more attention to inputs now, but should the bike be okay enough to run on the tack?

[MaverickAus]

I looked it up on partzilla they say it will ship within 3 - 4 days. I know it's no guarantee just reporting what the website says.

 

[CRAKALAKIN213]

That’s probably where I’ll get it from but it won’t be here before my track day on the 25th

[CRAKALAKIN213]

Just an update if someone else stumbles across this problem:
Alright, so after 2 minutes of removing the sensor it's quite clear that its been ground down a bit. Ordered a new one from partzilla. Will try to remember to confirm that was the issue once new one arrives and is installed.

[3alfa3]

sorry for late reply, but....

Even when taking off wheels, remove this sensors (front and rear) before you remove wheels. They are delicate and easy to damage.

[MaverickAus]

Originally Posted by 3alfa3

sorry for late reply, but....

Even when taking off wheels, remove this sensors (front and rear) before you remove wheels. They are delicate and easy to damage.

Personally I've never damaged one by removing or installing the wheels however I did remove the front sensor the other day when I pulled he wheels off for new tyres. I didn't think about removing the rear one (didn't even see it TBH)