Wrong speed indication

[jsyzdek]

I'm about to take the clocks apart and do the final LED upgrade.

While I will have it all open, maybe somebody can tell me how to correct my speed indicator? it shows about 10% higher speed that I'm actually going. Verified that with my GPS, speed indicators along the road... Any easy way to adjust it?

BTW - I'm running stock tires so that's not it.

[radodrill]

From the factory, bike speedometers are typically set up to indicate 10-15% high.  For the GS, this is a mechanical linkage (driven by the front wheel) where the rotation rate of the shaft drive dictates the indicated speed.  Running a front tire 1 size taller than stock would probably get you about right, but then you would also need to run an upsized front tire to maintain proper steering geometry and handling.

[jsyzdek]

Never mind. Not a biggie, thought there was a ez adjustment...


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[jdoorn14]

I don't have anything to add with regard to speedo correction, but I want to add if you're completely opening the gauge clocks to change to LEDs, either you're doing some custom work or you're doing way too much work.


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[twocool]

Get a GPS, and stick it on the handle bars...It will read very accurate speeds....

Don't bother reading the recent GPS threads...that will give you a headache!

If you monkey with the tire size...you may get the speedo to read correctly but then the odometer will be way off......


Cookie

I'm about to take the clocks apart and do the final LED upgrade.

While I will have it all open, maybe somebody can tell me how to correct my speed indicator? it shows about 10% higher speed that I'm actually going. Verified that with my GPS, speed indicators along the road... Any easy way to adjust it?

BTW - I'm running stock tires so that's not it.

[jsyzdek]

if you're completely opening the gauge clocks to change to LEDs, either you're doing some custom work or you're doing way too much work.

Well, I was installing the last LED - for the turn signal indicator. I had to take the clocks off to have a better access to the wires - I had to solder a couple of diodes in and take the ground from the high beam. It was better to have extra space.

I didn't actually open the clocks themselves. Just took the assembly off

[jsyzdek]

Get a GPS, and stick it on the handle bars...It will read very accurate speeds....
Don't bother reading the recent GPS threads...that will give you a headache!
If you monkey with the tire size...you may get the speedo to read correctly but then the odometer will be way off......

Nah, I was looking for an 'ez' fix if there was one. Getting the right reading is not worth a new rim and tire, and all the related work.

And yeah - I noticed I have wrong speed indication because I already have a GPS on 

[robfriedenberger]

You also could swap for a trail tech vapor, with a street kit.
It's a good upgrade and is accurate.

My buddy runs one on his yzf600,     It matches his speeding tickets and gps =)


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[twocool]

Cool...so just go by the GPS....your odometer is probably spot on...

I think it is a motorcycle industry standard to build in the conservative speedo error, about 8%.
(so you gotta watch when guys brag about their top speed and stuff)

You could also do the math in your head while you ride


Actually, for someone who was really anal..you could re-number the face of the dial...you 'd have to either silk screen a new dial, or maybe print something up on a computer....all you have to do is "compress" the gradations by 8%.  We sometimes send out airplane instruments to be re faced when the instrument comes out of one plane and installed in another.....or European instruments may be in kilometers per hour and we change to knots...etc..

Cookie

Get a GPS, and stick it on the handle bars...It will read very accurate speeds....
Don't bother reading the recent GPS threads...that will give you a headache!
If you monkey with the tire size...you may get the speedo to read correctly but then the odometer will be way off......

Nah, I was looking for an 'ez' fix if there was one. Getting the right reading is not worth a new rim and tire, and all the related work.

And yeah - I noticed I have wrong speed indication because I already have a GPS on 

[jsyzdek]

I have no problem with math and can always look at the GPS. But if there was a quick and elegant fix, I would do it. And for the most part I don't really care what speed I go at. I prefer to spend my attention on looking for debris on the road, or 

[twocool]

I guess you haven't gotten any speeding tickets (Yet)?

Cookie

The elegant fix is a new face plate for the speedo...I think there was actually somebody on this group who made them!

I have no problem with math and can always look at the GPS. But if there was a quick and elegant fix, I would do it. And for the most part I don't really care what speed I go at. I prefer to spend my attention on looking for debris on the road, or 

[jsyzdek]

nope. Been driving and riding since 1999 and no speeding tickets yet. And I have covered enough miles to go to the moon, speeding whenever I felt like it (i.e. A LOT).

I just see them before they see me

The only ticket I ever got (except parking) was for not having chains on my wheels in Tahoe. The cop pulled over about 20 cars, everybody got a ticket. He asked me: 'Where are your chains?' and I immediately responded: 'in my trunk. Where else would I keep them?'

It was 50F, dry, no black ice or snow for that matter. Went to court - still had to pay that ticket.  are always right. As a rule I avoid people who are ALWAYS right.

[Shepa]

Even more elegant solution is taking the speed needle off, and pushing it back a couple of degrees clockwise.

Offcourse, you have to take speedo apart first, which, IIRC is a real PITA, because of that shiny metal rings.

Anyway, once the ring and the glass is off the housing, carefully bend the needle so it passes above that little stick-stopper, and let it settle (unwound spring position).

Mark the pointer position with a pen, and take the needle off by using two teaspoons as levers (so you won't damage the needle/needle shaft/faceplate). Push the needle back on the shaft at desired position (and bend it over that little stick), pack everything back, and take the bike for a spin.

Sorry for my lack of precise technical terminology, English's not my native/spoken language.


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[dinkydonuts]

Mine is literally off by +10%.

When I want to do 70MPH on the interstate, I make sure it says 77 on the speedo.

[twocool]

OK...I have noticed anywhere between 8% and 10% conservative error...I suppose it depends on front tire wear...

Cookie

Mine is literally off by +10%.

When I want to do 70MPH on the interstate, I make sure it says 77 on the speedo.

[twocool]

Wow no speeding tickets...maybe you're not trying hard enough?  LOL

I'm sure that some states are more strict on enforcement than others.  I've gotten speeding tickets in NJ, NY. PA, FLA, SC, and many many warnings......and I really don't speed!  (ahem)

I know that some big western states consider the speed limit as a "suggestion only" and the cops don't believe in enforcement.  I have a friend who got stopped in Montana for doing about 120 in an 80 zone...Being from NJ he was scared that they would revoke his license and give him a huge fine.....he did get a ticket...$10....

Most recent ticket was a typical "speed trap around here"......county road in NY with 55 speed limit...in NY if NOT posted, then you assume 55....coming into a little town, the posted speed then goes 45, 35, 25, 15 for one lane tunnel, and then stop light....all in about 1/2 mile.....I did stop at the light, but I guess I didn't decelerate quick enough.....ticket for 48 in a 35....!!!

Most of the times I've been stopped...I have been let go without ticket...just a "slow down and be careful"....Being polite and honest helps a lot...

Cookie

nope. Been driving and riding since 1999 and no speeding tickets yet. And I have covered enough miles to go to the moon, speeding whenever I felt like it (i.e. A LOT).

I just see them before they see me

The only ticket I ever got (except parking) was for not having chains on my wheels in Tahoe. The cop pulled over about 20 cars, everybody got a ticket. He asked me: 'Where are your chains?' and I immediately responded: 'in my trunk. Where else would I keep them?'

It was 50F, dry, no black ice or snow for that matter. Went to court - still had to pay that ticket.  are always right. As a rule I avoid people who are ALWAYS right.

[twocool]

Since the speedo is off by a  percentage, rather than a fixed amount, this method will provide accuracy only at one speed.
I guess if  you moved the needle by 5 or 6 mph, it would make the speedo accurate in the commonly used range of 50 to 60..

Cookie

Even more elegant solution is taking the speed needle off, and pushing it back a couple of degrees clockwise.

Offcourse, you have to take speedo apart first, which, IIRC is a real PITA, because of that shiny metal rings.

Anyway, once the ring and the glass is off the housing, carefully bend the needle so it passes above that little stick-stopper, and let it settle (unwound spring position).

Mark the pointer position with a pen, and take the needle off by using two teaspoons as levers (so you won't damage the needle/needle shaft/faceplate). Push the needle back on the shaft at desired position (and bend it over that little stick), pack everything back, and take the bike for a spin.

Sorry for my lack of precise technical terminology, English's not my native/spoken language.


Sent from my toilet seat using HTC FartPhone

[twocool]

here are some examples of making your own speedo dial:

https://www.google.com/search?q=make+your+own+speedometer+dial&tbm=isch&tbo=u&source=univ&sa=X&ei=CtyaU8HmN7S2sAT83oHgCg&ved=0CCMQsAQ&biw=1024&bih=645

Here's a guy who did some nice work!

http://www.ukgser.com/forums/showthread.php?240217-Make-your-own-speedo-dial-designs

cookie

[twocool]

http://www.speedgaugecustoms.com/#!suzuki-boulevard/c1djv

Here's a place that can make the face for you...and incorporate the correction...starting at $35


cookie

[twocool]

http://gstwins.com/gsboard/index.php?topic=60597.0