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22Dasher
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« on: April 10, 2012, 08:56:47 AM » |
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OK before I tear into my speedometer I thoguht I'd come here and see if you guys may know whats wrong or direct me to a source of my problem.
The other night I was riding home and out of the blue I heard this really loud humming noise, I was thinking oh no water pump or generator going out. as I was slowing down to try and get a better listen to where the sound was coming from I just happened to look up and noticed the speedo showed I was running 75 mph and according to my tack I was running between 50-55. As I slowed down to about 30 the noise went away. Then back up to near 65 and it came back, slow back down and it quits again and each time the speedo was off. So is this a cable or is there a gear somewhere I need to replace?
Thanks in advance,
James
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Chrisj CMA
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« Reply #1 on: April 10, 2012, 09:14:46 AM » |
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Im assuming you have an IS as opposed to a standard or tourer where the speedometer runs off of a cable (mechanically driven). The IS has a pickup and it generates an electronic signal. I would check out the sending devise at the axle first.
Im glad this is a speedometer issue and not a "speedo" that is too tight or something......bad visual and a whole different set of potential problems
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« Last Edit: April 10, 2012, 09:16:24 AM by Chrisj CMA »
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22Dasher
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« Reply #2 on: April 10, 2012, 09:43:32 AM » |
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Im assuming you have an IS as opposed to a standard or tourer where the speedometer runs off of a cable (mechanically driven). The IS has a pickup and it generates an electronic signal. I would check out the sending devise at the axle first.
Im glad this is a speedometer issue and not a "speedo" that is too tight or something......bad visual and a whole different set of potential problems
Im sorry I guess I should had put bike info in there, no I have a 98 Tourer with cable. James |
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Michvalk
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« Reply #3 on: April 10, 2012, 10:01:49 AM » |
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Well to start off, I would lube the cable and check it out. Should be able to look at the cable and see if it is broken or fraying. Also look to see if the wheel apparatus is in the right position. Have you had the front wheel off lately? Start there and see what happens  |
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RonW
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« Reply #4 on: April 10, 2012, 12:30:17 PM » |
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all that's needed to inspect the internal cable is to remove phillips screw at the speedo housing on the axle. The cable falls out by itself from the sheathing. Actually slitters on the floor and picks up grit. To reattach the cable to the speedometer you'll have to loosen the nut under the meter so you can position the tang at the top end of the cable properly. With the internal cable disconnected at the lower end you'll be able to manually rotate the tang that turns the nylon gears in the lower speedo housing unit to see if they operate smoothly, it's a worm gear arrangement.   |
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« Last Edit: April 10, 2012, 12:45:22 PM by RONW »
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2000 Valkyrie Tourer
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RonW
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« Reply #5 on: April 10, 2012, 01:14:34 PM » |
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Also look to see if the wheel apparatus is in the right position. Have you had the front wheel off lately? Start there and see what happens
should look like this ....  |
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2000 Valkyrie Tourer
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Chrisj CMA
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« Reply #6 on: April 10, 2012, 01:40:30 PM » |
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I cant imagine how a mechanical speedometer would read so much off all of a sudden. I mean if the cable breaks it reads a tad low (LIKE ZERO) but what would make it read high?
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Momz
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« Reply #7 on: April 10, 2012, 02:29:23 PM » |
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The Speedo Drive is the same between all Valk models. The I/S models have an "analog to digital" transducer attached to the drive unit and no "cable in sheath", however they do have an digital cable that sends a signal to the dash mounted readout.
I've seen speedo drives fail as well as cables. If the cable checks out, replace the drive at the wheel/axel interface. And yes, don't overtighten the cable mounting screw at the drive unit.
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 ALWAYS QUESTION AUTHORITY! 97 Valk bobber, 98 Valk Rat Rod, 2K SuperValk, plus several other classic bikes |
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22Dasher
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« Reply #8 on: April 15, 2012, 07:48:56 PM » |
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Well Uodate on my speedo issues, To back up a bit on a question I had the dealership replace both tires on my bike last fall and this issue started right after the replacement. Now update, I removed the front wheel and rechecked the speedo assembly at the wheel and pulled the cable and it looked fine also I greased the cable and reinstalled everything back as it should be. Rode a roughly 300 miles over the weekend with no issues from the speedo. So who knows? The cable was a bit dry so it may had just needed grease. The thing is it wasn't happening all the time when it began so I'll just have to wait and see if it starts back. I'm like some of you though I don't understand how it will read faster when I know I'm running a good 20 mph slower. Then with my luck anythnig can happen  |
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Chrisj CMA
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« Reply #9 on: April 16, 2012, 04:58:27 AM » |
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Well Uodate on my speedo issues, To back up a bit on a question I had the dealership replace both tires on my bike last fall and this issue started right after the replacement. Now update, I removed the front wheel and rechecked the speedo assembly at the wheel and pulled the cable and it looked fine also I greased the cable and reinstalled everything back as it should be. Rode a roughly 300 miles over the weekend with no issues from the speedo. So who knows? The cable was a bit dry so it may had just needed grease. The thing is it wasn't happening all the time when it began so I'll just have to wait and see if it starts back. I'm like some of you though I don't understand how it will read faster when I know I'm running a good 20 mph slower. Then with my luck anythnig can happen Well, Im glad you got the mystery sorted out for now. However, you have proven my theory. The best way to learn how to fix your Valkyrie is to let a dealer touch it. After you pay for them to mess it up, you wont want to pay more, so you learn how to do it right yourself. Next time just bring them the wheels, Oh and make sure you remind them (in the tire shop) that the drive is on the opposite side from the VTX and that is NOT a VTX tire. I stopped the tire guy right as he was starting to put my rear tire on the wheel backwards........Yep, he thought it was a VTX |
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indybobm
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« Reply #10 on: April 16, 2012, 06:12:58 AM » |
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I have had this happen on a car before. A dry cable can make the speedo go crazy. On a 91 Mustang, as soon as you hit 65mph, the speedo would peg until you slowed back down to 25 and then would be ok until you hit 65 again. Seems like the dry cable catches and releases at a high rate which confuses the speedo. When it 'releases' it is 'catching up' and moving at a higher rate like a wound up spring. This happens many times a second. Lubrication will usually fix it.
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So many roads, so little time
VRCC # 5258
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Hoser
Member
Posts: 5844
child of the sixties VRCC 17899
Auburn, Kansas
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« Reply #11 on: April 16, 2012, 06:56:03 AM » |
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I have had this happen on a car before. A dry cable can make the speedo go crazy. On a 91 Mustang, as soon as you hit 65mph, the speedo would peg until you slowed back down to 25 and then would be ok until you hit 65 again. Seems like the dry cable catches and releases at a high rate which confuses the speedo. When it 'releases' it is 'catching up' and moving at a higher rate like a wound up spring. This happens many times a second. Lubrication will usually fix it.
+1 |
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I don't want a pickle, just wanna ride my motor sickle  [img width=300 height=233]http://i617.photobucket.com/albums/ |
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