Hi everyone, my speedo has just stopped working. The display illumnates, but just shows a big fat 0, and I know it's faster than that! I was just wondering if anyone could help me diagnos if it's the magnet, the sensor or something else before I buy the wrong thing from Brian!
So my speedo on my 99 TTR250 has stopped working. I undid the bottom part of the cable and hooked up a cordless drill and it will show movement on the speedo and trip counter so assume the problem is not in cable or display.
Looking through the pages here I found the following info, and wondering if it is easy to check this washer to see if it is the problem.
f) For mechanical speedos, as fitted to UK blue models, Yamaha only sells the speedo drive mechanism in one piece (part number 4PX-25190) - price inc VAT is a whopping £116.85 plus VAT as at August 2010!!! But it is usually only the three-tab "drive" washer that fails and these are no longer available separately. However a stainless steel after-market tab washer is available from Totally TTRs.
Send an email to sales@totallyttrs.com with a note of what you want and where you are and Trish will sort you out
The s/s washer doesn't always cure the problem but to give it the best chance make sure you clean out the internals of the drive gear very well and particularly make sure there is no dirt or grit that might jam the worm gears.
The s/s washer doesn't always cure the problem but to give it the best chance make sure you clean out the internals of the drive gear very well and particularly make sure there is no dirt or grit that might jam the worm gears.
Cheers
Brian
some times you need to change the washers as well.
The s/s washer doesn't always cure the problem but to give it the best chance make sure you clean out the internals of the drive gear very well and particularly make sure there is no dirt or grit that might jam the worm gears.
Cheers
Brian
some times you need to change the washers as well.
Good point and a good reminder to add a note to our advert!
If the washers are worn then it might leave the new tabbed washer wobbling about a bit!
Hi. My 2006 ttr has a dash light. Maybe try your bulb. I did the light switch job from the imfo on this site. All my lights go off with one switch. Although ive left my dash light running. Still deciding if i will do the tail pipe air box rejet job. I only weigh about 70 kgs so the bike gets up and goes already.
Im new here, searched and read all posts regarding speedo problem but it seems my problem is not mentioned.
For the past two weeks I v been using my newly acquired TTR. Upon turning on the key the speedo does the usual start up 188KMph and then sets to 0. Worked fine...till.....today
I turned on the speedo and nothing not even 0 , the back light is on but the digital speedo is blank. Any suggestions please ?
P.s. I did not mess with anything, just took the exhaust apart for a clean up!
It was cleaning up the exhaust that caused the problem
Seriously, all I can suggest at this stage is that you take the headlight off and carefully examine the wires going into the speedo's block connector and the terminals themselves for any corrosion or damaged wires. If it all looks good then give both sides of the connector a good spray with electrical clean up fluid and connect it up again keeping your fingers crossed it was a poor connection!
If that fails then I am not sure what to suggest next as I don't know what the individual wires do.
I have a memory of seeing a diagram explaining the wiring but can't immediately find it. Maybe someone else can help?
I just came up from the garage and I am reading your reply ( I appreciate your help a lot ). I fixed it, as you suggested it was a simple cleanup of the Blue Terminal block. I am a happy man now
Just a small contribution from my end. a few days ago I added a small tachometer. I used aluminium piece and attached it to the bar clamp bolt. I lined it up so I can watch both the speedo and the rev counter whilst driving.
An addition would be a small green led with a shunt to light it up when I turn on the key.
Phote attached , shall I post it elsewhere Brian ? Nice eve and a happy weekend to all
Regarding the tacho, it would be good to start a new thread on the modifications forum here . I am sure members will be interested to see what you have done.
Is there a way to adjust the calibration of the analogue speedo on a blue tanked TTR. Mine is definitely reading out quite considerably. Is a kmh speedo, but it's almost reading my, but not quite. Yesterday the speedo was reading about 85kmh but my goods track says I was going at 105kmh, that's almost a 25% under reading.
I test digital speedo heads by plugging them into my "shopping" TTR where I know the existing speedo is working. If it doesn't work then the speedo head is duff coz I know everything else is OK.
Is it the speedo head on your own TTR? If so, then the first suspects are the magnet and sender unit on the front sprocket.
Check the magnet is in one piece and, if so, check you have the pulsing output on the speedo sender. If both OK then it starts to point to a problem in the speedo head itself
Hi Brian
Jam wanting to sell the speedo unit as I have stripped the bike down to the basics for enduro purposes . I have removed all the connections and exess wiring that goes with all the switches and speedo but stupidly didn't cheack it worked before I started . I know these are hard to come by these days so didn't want to throw it out if someone can use the parts. The magnet is fine but someone has been at the wires and cut the pick up wires and been messing with the generator wires . Plus there's only one other ttr in Paphos and it's the blue tank model so I can't even test it on that!
Thanks for the info
When I do the speed sensor test I get a constant voltage of 4.79v. In my simple mind I think a broken electrical component should have 0v, I'm assuming it's broken, have you got a spare exchange unit in stock Brian?
When I do the speed sensor test I get a constant voltage of 4.79v. In my simple mind I think a broken electrical component should have 0v, I'm assuming it's broken, have you got a spare exchange unit in stock Brian?
Hi Ken
I am not too clever on electrics but the manual says the voltage should go between 5V and 0V as you slowly rotate the rear wheel.
If yours doesn't do this then, yes, there is something wrong.
what is the general consensus about how accurate TTR speedo's are?. I don't have a GPS to check mine but with the largest gearbox sprocket fitted to my 2011 with no other changes to factory rear sprocket or tyre I get the impression on the motorway which has a 110 kph limit that i'm travelling on the legal limit with my speedo reading almost 120 kph. you get the sense that most cars are doing that speed in the inner lanes but you certainly get passed by a lot in the so called passing only lane which you are not supposed to travel in except when overtaking.
When it grinds to a Holt! Ha na, I usually flick it to reserve on the 70th mile. I can only really get 80 ish out of my tank. But then again I am fat ha
When it grinds to a Holt! Ha na, I usually flick it to reserve on the 70th mile. I can only really get 80 ish out of my tank. But then again I am fat ha
70 it is then I'll have a fiddle with the speedo this weekend.
Someone started a thread with some pics showing how to get into the mechanical speedo head but darned if my searches can find it
Searched on speedo, head, apart etc but no result!
My recollection is that the top of the speedo is glued on. To get it off you need to cut around it in some way. Perhaps using a small hacksaw blade or a Dremel. There is bound to be a small amount of damage when you come to lever it off but if the alternative is to replace it then you have nothing to lose!
If you do have a go then please take some pics and let us know how you get on
Someone's had a go at mine before. It does look like there is a tiny slot to shove a terminal screwdriver in the base and flick it open and that's what they've tried and given up. Bit daft being 'totally' sealed. Speedo's perfect through them flashy things ont roads now, just can't see how far I go. It's bugging me. If the weathers crap again tomorrow I'll have a go at it.
Yeah I find the search box on here sometimes doesn't give you the best results ever.
I sometimes revert to a Google search using Item site: http://ttr250.activeboard.comwhere you replace Item with whatever you are looking for but it didn't help me find the speedo thread I was looking for
Speedo problem
checked cable washer and the usual .
Speedo goes to 0 to 20 mph and no further .
Do i just need a new speedo unit or is there any internal fault i can fix .