Ducati speed sensor

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Tipper2 · #1 Post by **Tipper2** » Wed Apr 27, 2016 5:55 pm

My speed sensor was knackered so got one from a 2007 Ducati Monster which I read somewhere should work OK once the connector was changed.

The wiring colours were the same and the only difference I could see was that the cable came off at a different angle- but it doesn't work when mounted.

It reads OK when held by hand a similar distance from the bolts but doesn't read when bolted into the carrier.

It seems to be lining up centrally with the sprocket mounting bolts- are these stainless button-head allen bolts as standard because that could be my problem?

Any help will be appreciated.

Thanks.

Dalemac · #2 Post by **Dalemac** » Wed Apr 27, 2016 11:32 pm

Presumably you mean centrally with the brake disk mounting bolts?

They should be hex flange bolts as standard. I'd hazard a guess that your original speedo sensor is fine and it just isn't picking up the allen bolts on the brake disk.

Get some standard bolts, part number 15 on this diagram, and try again http://www.apriliagenuineparts.co.uk/co ... r-3700.php

Tipper2 · #3 Post by **Tipper2** » Thu Apr 28, 2016 5:48 am

Thanks for that.

I bought the bike as a non-runner and the speedo never worked but the sensor was split and rotten- it could be that there was more than one problem.

Will change the bolts and see what happens.

old git · #4 Post by **old git** » Thu Apr 28, 2016 7:09 am

I'm reasonably almost certain the SS bolts will be the issue, sure ive read somewhere they have to be 'normal' steel otherwise there is no reading on the speedo

Tipper2 · #5 Post by **Tipper2** » Thu Apr 28, 2016 8:58 am

On the look out for new bolts this morning, thanks.

On another note, I've just ridden my bike for the first time since the build and noticed a rumble from somewhere in neutral that disappears when the clutch is pulled in.

Someone please tell me this is normal.....

D-Rider · #6 Post by **D-Rider** » Thu Apr 28, 2016 9:12 am

Could well be the nuts on the sprocket - a lot of people have trouble when they fit titanium ones - I guess stainless may well depend on the grade. Best thing is stick to standard

Tipper2 wrote:On the look out for new bolts this morning, thanks.

On another note, I've just ridden my bike for the first time since the build and noticed a rumble from somewhere in neutral that disappears when the clutch is pulled in.

Someone please tell me this is normal.....

As for the rumbling in the clutch .... likely to be an early warning that the clutch bearing is on the way out - you don't want to let it destroy itself.

fatboy · #7 Post by **fatboy** » Thu Apr 28, 2016 6:10 pm

As D-R said, check the bearing in the clutch pressure plate.
They do make a fair old chatter but check for roughness and play.
I replaced mine because of the noise worries, the result was the same noise but at least I knew it was a brand new bearing.
Others on here have been concerned about the noise, checked the bearing and it's fallen apart on dismantling.
It's a quick job to check or change

Tipper2 · #8 Post by **Tipper2** » Fri Apr 29, 2016 8:31 am

Disc bolts are on their way so hopefully that'll be sorted.

I've checked the clutch pressure plate bearing and it seems OK but will replace it anyway while I'm in- thinking the same way as you Fatboy.

The clutch hub bearing seems a bit noisy so I'm going to have a look at that too, once I get hold of a clutch holding tool.

It's all probably for nothing and just a normal Falco noise but don't want to take the chance.

wayno · #9 Post by **wayno** » Fri Apr 29, 2016 9:49 am

It is the bolts that will be your problem, they pick up on the magnetics of the bolts so stainless steel won't work.

Tipper2 · #10 Post by **Tipper2** » Tue May 03, 2016 6:36 pm

Sorted! Changed stainless bolts for standard and working fine (on the paddock stand anyway) - thanks for the advice Gents.

Clutch is making the same noise but my mate said he couldn't hear it so probably just me looking for non-existent problems :)

fatboy · #11 Post by **fatboy** » Tue May 03, 2016 7:04 pm

The clutch does rattle a bit, if you can still hear the same noise with the clutch disengaged then further investigation is advised.
With the lever pulled in then everything is under load so any wear and tear noise is eliminated.
Total strip down is easy but you do need a locking tool, universal locking plier type tolls can be had for around £20, notbad as they fit all sorts of pulley's ect

Tipper2 · #12 Post by **Tipper2** » Tue May 03, 2016 7:12 pm

I've got a clutch locking tool- came on Saturday!

After having it apart I'm happy it's OK and can live with it without that niggle in the back of my head that would have stayed if I hadn't stripped it.

fatboy · #13 Post by **fatboy** » Thu May 05, 2016 6:22 pm

Job done !