Speedo rotor replacement

[Warthog]

Problem: K3 naked digital speedo just started reading all over the place like a random number generator. Sometimes also worked fine, and also sometimes just 0.

So I took the the front wheel off and saw that the speedo rotor was mangled. bought a new one for £17.54 quid and here is me fitting it on:

http://i259.photobucket.com/albums/hh301/deathUK2003/SV108256.jpg

Old rotor:
http://i259.photobucket.com/albums/hh301/deathUK2003/SV108257.jpg

New on left, old on right:
http://i259.photobucket.com/albums/hh301/deathUK2003/SV108258.jpg

Bit where it fits in:
http://i259.photobucket.com/albums/hh301/deathUK2003/SV108259.jpg



So I swapped them over, and screwed it all back together.

Result: STILL BROKEN :sad:

Even when sitting still it sometimes reads all over the place. So my guess is that it is an electrical gremlin. The old rotor might still well have been functioning! Anyway, it clearly needed replacing anyway. I hope this helps some of you who are also having problems right now. I will update further once I have poked the electrics a bit.

[Sid Squid]

Are you sure you haven't broken the new one when fitting? They are pretty fragile and it isn't unusual to hear of non functioning speedos after the wheel has been off.
Even with broken drive lugs you can still turn it quick enough by hand to get a reading of 1 or 2 mph, try that and see if the problem is still there before checking further.
The other sometimes troublesome area is the cable getting trapped between the lock stop and the frame, damage from getting squashed there isn't always immediately obvious.

[petevtwin650]

So I took the the front wheel off and saw that the speedo rotor was mangled. bought a new one for ?17.54 quid and here is me fitting it on:


Looks like Phil fitting it to me.:confused:

Looks really thoughtful doesn't he?:)

Well at least it wasn't 18 quid wasted although I suppose a whole replacement sender with cable to the loom would have discounted any pinched problem as suggested by SS.

Good luck Nick.

[Warthog]

Are you sure you haven't broken the new one when fitting? They are pretty fragile and it isn't unusual to hear of non functioning speedos after the wheel has been off.
Even with broken drive lugs you can still turn it quick enough by hand to get a reading of 1 or 2 mph, try that and see if the problem is still there before checking further.
The other sometimes troublesome area is the cable getting trapped between the lock stop and the frame, damage from getting squashed there isn't always immediately obvious.

I was fully aware of people breaking it when fitting a new one so I was constantly shouting at Phil to make sure he lined it up properly! I think the clue here is that after we had replaced it, when sat still, it was still reading all over the place. Surely a squashed rotor can't give a false positive reading when idle? Must be electrical. I shall check the rest of the wiring for squashedness, cheers!

[krhall]

Ah man - WARTHOG - I was looking to you before embarking on my journey of speedo rotor discovery. Mine never did random numbers but now doesn't leave 0 ever. Clock, temp and rev counter all perfect.

[petevtwin650]

Ah man - WARTHOG - I was looking to you before embarking on my journey of speedo rotor discovery. Mine never did random numbers but now doesn't leave 0 ever. Clock, temp and rev counter all perfect.

Well that does sound like a broken rotor.

[Stu]

Even with broken drive lugs you can still turn it quick enough by hand to get a reading of 1 or 2 mph, try that and see if the problem is still there before checking further..
So are the 4 flanges just lugs that aid in the turning? & it is the turning that records the speedo? so not like my system that requires 4 magnets to pass a sensor?

Nick, I still have 2 speedo rotors/sensor's/cables if you want to try them.

[seedy100]

I'am going through the same thing at the moment.

Someone swapped my speedo for a random number generator.

Had the front wheel off and the rotor out last night, rotor was fine.

Put it all back togther, tunet the power on and, back to random numbers. - pooh

Next step was to free the cable and inspect it for damage. - none obvious - pooh

Next disconnect the plug under the tank, spray it all with ACF50, no WD40 to hand.
Put it back togther - nice steady zero reading.
Take it for a run - nice steady zero reading - pooh.
Then the random numbers start again - POOH POOH.

Now I'am stumpped, any advice - please!














Pooh poohing my pooh poohs would be unkind.

[krhall]

I'm trying the speedo rotor replacement tomorrow, if the weather is kind to me!!!

[Warthog]

I'am going through the same thing at the moment.

Someone swapped my speedo for a random number generator.

Had the front wheel off and the rotor out last night, rotor was fine.

Put it all back togther, tunet the power on and, back to random numbers. - pooh

Next step was to free the cable and inspect it for damage. - none obvious - pooh

Next disconnect the plug under the tank, spray it all with ACF50, no WD40 to hand.
Put it back togther - nice steady zero reading.
Take it for a run - nice steady zero reading - pooh.
Then the random numbers start again - POOH POOH.

Now I'am stumpped, any advice - please!














Pooh poohing my pooh poohs would be unkind.

I knew a general who was pooh poohed once. In the end they had to disband the regiment! :lol:

[5v5 rider]

I had exactly the same issue - replaced the rotor still no joy - bought a sensor/drive from a breakers in bristol and swapped it over and touch wood....been working fine to date..2 weeks.

[Warthog]

Small update. I checked the entire route from wheel to dash. Couldn't see anything wrong anywhere. Then I unplugged the wire insode the headlight and the speedo is just dead on 0. This shows that the problem is with the speedo sensor (not rotor!) or the initial bit of cabling from the wheel to the headlight junction. Now I need a new one of them I guess!

[21QUEST]

Are you sure you haven't broken the new one when fitting? They are pretty fragile and it isn't unusual to hear of non functioning speedos after the wheel has been off.
Even with broken drive lugs you can still turn it quick enough by hand to get a reading of 1 or 2 mph, try that and see if the problem is still there before checking further.
The other sometimes troublesome area is the cable getting trapped between the lock stop and the frame, damage from getting squashed there isn't always immediately obvious.


That was my problem. Actually, the break in the wire on mine, was at around the section where it clips down onto the mudguard(curvy).

Jacked the front up, spun wheel by hand and played with the cable along it's length till I found the break. Then just a matter of stripping back the insulation.....


Ben

[Lozzo]

Problem: K3 naked digital speedo just started reading all over the place like a random number generator. Sometimes also worked fine, and also sometimes just 0.



Old rotor:


New on left, old on right:
http://i259.photobucket.com/albums/hh301/deathUK2003/SV108258.jpg





Your old rotor is still like new compared to the one I removed from my ex's bike last Thursday. Basically, that one had to be dug out in a million mashed to hell bits with a thin screwdriver. There wasn't one part of it that was recogniseable as ever having been associated with a motorcycle or in fact anything at all. Tori's speedo was stuck on 0mph, it didn't generate random numbers. She'll be replacing it herself now the housing and wheel bearing have been cleaned out of all the mashed up bits.

[krhall]

Speedo rotor fitted and has solved the probs for me - shame really my driving was getting better due to not knowing the speed.

.....another downside is now I am clocking up miles again.......damn!

[LaurenceRosling1987]

Well don't know if this is any help or if anyone has any advise for me but my SV 650 04 un-faired shows double the actual speed I'm traveling at and then tops out when it get to 186 mph. The rotor is fine so I'm not sure if there is some kind of pulse reading error with it, I have got a CCM headlight conversion on it and as did this mod before I used it I'm not sure if it had the problem before.

Does anyone know whats going on?

[Warthog]

PROBLEM SOLVED. FINAL REPORT:

Thanks to org member aadeyc73 I got hold of a curvey speedo drive and cable that led up to the headlight junction. I swapped them round and noticed that they DIDN'T fit! I think this is possibly new forum knowledge, I am dead excited haha. The problem is that the bolts that hold the disc on on the pointy bang against the plastic where the lead comes out of the drive. The pointy speedo drive is cut away a little cos the discs are straight, and the curvey drive is flush with the plastic casing cos the discs are kind of bent if you know what I mean. There is another difference: although the rotor and the plastic casing is the same distance apart, the rubber seal is slightly further out on the pointy drive. This means that when attaching the curvey drive, the seal hits earlier and therefore means the plastic outer rim has about a mm gap when you tighten it up. I did my first bit of bodging and filed the plastic down a bit where the cable comes out of the drive so that the disc bolts didn't catch on it. It worked fine. And now it is all done up and working although there is that gap of about 1mm which will probably get gunked up quickly, I will report on that if it does break.

So, it is fixed! And to celebrate, I made a gif of my favourite bike mechanic hero:
















http://i259.photobucket.com/albums/hh301/deathUK2003/sididea.gif

[xbox650]

I replaced my rotor this weekend while respraying the forks and am now having the same problems as LawrenceRosling1987 . It now reads 2x as fast as normal , Petrol guage (trip1) goes up 2x normal , Mileometer (?) is increasing 2x normal and it tops out at 186mph .
Anyone know why or how this has happened and possibly offer a cure ?

[petevtwin650]

Glad you got it sorted Warthog.

But you do know why the old lead was broken?

[Warthog]

THere was no sign of any damage on the outside at least. Could have been the lead or could have been the sensor itself inside. I have the old one if you want to take it and find out where the fault was! :-P

[petevtwin650]

THere was no sign of any damage on the outside at least. Could have been the lead or could have been the sensor itself inside. I have the old one if you want to take it and find out where the fault was! :-P

Bizarre.

Might take you up on the offer Nick although I'm no electrician/electronic geek. :):cool:

[aadeyc73]

It's good to see that you got it fixed. Hopefully it'll continue for as long as it did on mine.

[Warthog]

There is the man himself, and all for free too. +1 to Karma 8)

[LaurenceRosling1987]

Yer the mileometer works double time on mine as well as the trips but the fuel light seems fine. My dads got the same model SV as mine so when he gets his back from having a new can fitted ill swop the spedo drives round then i can find out if thats the problem.

[Binky]

Finally got round to checking the speedo rota today. Took the calipers off, gently lowered the wheel off to find a slightly worn rota. Looks still usable to me, so may be a wiring /electrical fault. I took a photo just in case and started putting the wheel back on...

... Only to find it impossible to get one of the calipers back on the discs. ...and now the right hand side brake pad has come off and swings round from the base of the caliper like a hand on a clock. (it's still attatched, but only at one end)

So does anyone know if there is a simple fix, or do i need new pads or a whole new caliper??? If so roughly how much will a brake pad or caliper cost me???:(

[Warthog]

Finally got round to checking the speedo rota today. Took the calipers off, gently lowered the wheel off to find a slightly worn rota. Looks still usable to me, so may be a wiring /electrical fault. I took a photo just in case and started putting the wheel back on...

... Only to find it impossible to get one of the calipers back on the discs. ...and now the right hand side brake pad has come off and swings round from the base of the caliper like a hand on a clock. (it's still attatched, but only at one end)

So does anyone know if there is a simple fix, or do i need new pads or a whole new caliper??? If so roughly how much will a brake pad or caliper cost me???:(

Only one side of one of the pads is attached, it just kind of clips under a bit of metal. Never touch the brakes with the calipers off, just try to push the pistons back apart a bit to get it back on the disc.

[Binky]

Only one side of one of the pads is attached, it just kind of clips under a bit of metal. Never touch the brakes with the calipers off, just try to push the pistons back apart a bit to get it back on the disc.

Oh, ok. I have tried to push them as far apart as possible but the gap is not large enough to slide them over the disc. If i push one end of the pad further from the other pad it pinches at the top and won't fit on. It's very fustrating.:smt102

[Warthog]

Oh, ok. I have tried to push them as far apart as possible but the gap is not large enough to slide them over the disc. If i push one end of the pad further from the other pad it pinches at the top and won't fit on. It's very fustrating.:smt102

Well a mechanic got a massive pair of tyre irons and prised them apart with full force on mine, but that was with pads to be thrown away as that probably knackers the pads (and it shot brake fluid out of the reservoir! :confused:). Someone must have a cunning trick to spread them apart safely! I think me and Phill used some screw drivers. Not sure how to do it without ruining the pads sadly sorry.

[Binky]

I was told by a friend tonight that the reason was because the reservoir is leaving no space for the fluid to push back to. So if i take the lid off the reservoir i will be able to prize them apart and fit them back round the discs. This sounds logical to me and i'll give it a go in the morning.

I'll try just seperating them with my hands. Is that wise???

[Warthog]

I was told by a friend tonight that the reason was because the reservoir is leaving no space for the fluid to push back to. So if i take the lid off the reservoir i will be able to prize them apart and fit them back round the discs. This sounds logical to me and i'll give it a go in the morning.

I'll try just seperating them with my hands. Is that wise???

I think that it won't work with your hands, you need more leverage or power. But you don't want to touch the insides of the pads much. I really don't know, I wish someone else would post as I am no expert!

[Binky]

Tried and tried prizing them apart today. I gave up and bit the bullet. I pushed the mother about 3/4 of a mile to my local garage. Doesn't sound much of a distance but in the searing heat was a pain. The guy simply went at it with a couple of flat head screwdrivers and managed to fit it back on the discs within about 4 minutes. I watched to see if he was toucking the inside of the brake pads but everything seemed ok. So problem solved i guess. :)

[matek]

Hi there
I have the same problem with my SV650S k3. I need to buy and change a speedo rotor but I have no idea where I can buy it. I checked on internet by I couldn't find anything. Please could you help me and tell where I can buy the speedo rotor. If you could give me any link with shops/sellers/suppliers etc.
Thank you for your help.

[Binky]

Hi there
I have the same problem with my SV650S k3. I need to buy and change a speedo rotor but I have no idea where I can buy it. I checked on internet by I couldn't find anything. Please could you help me and tell where I can buy the speedo rotor. If you could give me any link with shops/sellers/suppliers etc.
Thank you for your help.

I know PeteVTwin650 and Lissa are breaking thier bike. They may still have one on offer. Here is the thread.

http://forums.sv650.org/showthread.php?t=117408

[trevrobwhite]

If I were you I'd get a new one, I tried getting a second hand one when then also packed up, even the one the dealer fitted packed up (because of a bur apparently), but then they had to replace it FOC.

[matek]

Thanks for your advice. I will go to suzuki dealer tomorrow (I hope that they have it) and I will try to exchange it during the weekend. Im from Manchester so I'll try to check the suzuki dealers around, maybe one of them will have it on stock.
Thanks

[trevrobwhite]

My dealer had to order it, but then I am in Cornwall, however it came within a couple of days.

[petevtwin650]

Thanks for your advice. I will go to suzuki dealer tomorrow (I hope that they have it) and I will try to exchange it during the weekend. Im from Manchester so I'll try to check the suzuki dealers around, maybe one of them will have it on stock.
Thanks

Go here, select the year and model and find the part number.

http://alpha-sports.com/suzuki_parts.htm

Copy the whole part number

Then go here. Look at "Online Shop" on the left. Click on parts. Paste the number, and hopefully you'll get a price and can place an order if you so wish.

http://www.robinsonsfoundry.co.uk/

Usually get the parts within 3 days. The chances of a Suzy dealer having that part on the shelf is very remote.

[Warthog]

I just rang the Abingdon Suzi dealer and they ordered it in for £17.45 or so. Picked it up a few days later, job done.

[matek]

Hi Guys.
Thanks for all your help. I checked today my moto and I think that it's a bigger problem. The speedo rotor looks like a new. I was really surprised! I checked all the cables and the there is the power, so I think that maybe it's a speedo sensor :smt089 ₤102! I don't know what can cause this problem if the speedo rotor is ok. Do you know maybe where can I find a cheeper speedo sensor, I checked ebay but there is nothing for SV.

[matek]

And here is the photo of my speedo rotor.

[petevtwin650]

Speedo sensor. Where's that?

Is that the unit that the rotor sits in?

[matek]

Yes. It's this part where rotor sits, and this part is with cable which goes up. I attached the picture, and this sensor is number 20.

[petevtwin650]

Yes. It's this part where rotor sits, and this part is with cable which goes up. I attached the picture, and this sensor is number 20.

I have got one of those sensors and rotor. But it's from a curvy. Don't know if it is the same as a pointy.

[Tilt]

We have the same problem re the speedo reading twice the actual speed.

A dealer replaced the whole sender and rotor (charging us £60 plus fitting). Because the rotor was broken. (albeit that the speedo worked fine before he had the wheel off)

But we then discovered that the speed read out was twice normal.

Dealer advised he would change the lot as he fitted units for a Vstrom thinking they were the same. But advising an additional cost of £40 plus.

For £40 we got a complete rotor and sender on Ebay with a view to returning (and gaining credit for) the unit fitted by the dealer.

But after fitting this also reads twice the speed!!

The one we took off "appears" to be in perfect condition.

Something wierd is happening any clues???

[yorkie_chris]

You lot who have double-reading speedos, you have wrong rotor fitted, or you have it set in kph perhaps. Later pointies use 8 magnets per rotation.

[Dangerous Dave]

We have the same problem re the speedo reading twice the actual speed.
See the other thread (http://forums.sv650.org/showthread.php?t=117360) you posted in....