Speedo inaccuracy

[Tork]

I also think product liability might have something to do with it.
Ladies and gentlemen of the jury, we put on warning stickers, the manual is full of warnings. We even try to keep the speed down by having this recreational vehicle actually traveling slower than the speedometer says.

It is possible.

 

[RTX Meirda]

Every sled has an inaccurate speedo. My RX1 would read 128mph and actual was 114mph. Many riders think that their speedo is actually how fast their sled goes. When someone tells me their 600 twin does 115 mph....I tell them mine goes 128.

It's all relative

 

[Sled Dog]

Its so your warranty runs out quicker and to make you think your sled is faster than it actually is. Win win situation for Yamaha one your mileage is going to end sooner if your speedo is out 10% you just lost 10% of your warranty for mileage. Two is the mouth to mouth sales pitch in how fast the sled is at the gas station or restaurant or warmup shack.

 

[BA APEX]

could someone take a pick of the piece to grind off? I may do it as soon as we get some ice. buddy has a radar gun so i should be able to get it close.

 

[HAMMER]

Already cut two teeth out of my Apex speedo gear… 0-miles… Now I'll be slower and get worse gas mileage but the warranty will last longer… Ooops, I voided the warranty the first week I had it by installing the SC… Guess the only up side is it will save me some math work… I’ll know how many miles I really traveled and how fast I was really going without subtracting 11-13%… Here's a pic BA APEX that was posted a couple years ago on TY… Don't know who to give the credit…

 

[Dano]

One thing I noticed with comparison to my GPS is that the odometer seems accurate while the speedo is way off. I have no clue how this can be, but my GPS odometer was exactly the same as speedo odometer after about 110mile trip. Maybe I lost signal for a bit, I’m not sure. I will be grinding a tooth or two out of my speedo gear as well. I’ll try 1 tooth at a time. Hopefully my odometer won’t be way off.


Dan

 

[milkman]

Just wondering how accurate the gps's are???
Just a thought

 

[nbsledder]

Dano, let us know the results on the odometer thing, i read that on here ......the odometer being accurate and speedo not.....if i had a choice i would rather have the odometer,fuel mileage,oil change etc.

 

[SledderSteve]

For what it's worth, I found the odometer/speedometer thing to be true this past summer on my Grizzly ATV's as well. In fact, the speedo was matching the GPS up until about 35 mph after which the speedo started to get optimistic, reading 57 when the GPS was reading 54. The odometer pretty much matched dead on as long as I wasn't doing a lot of wheel spinning in the mud in which case it showed a higher reading.

I could be wrong but my personal thought is that there's a little 'extra' logarithmic calibration happening to the speedo display and the odometer is simply counting spins.
:exc:

 

[RoyT]

LOL... since we're on the speedo accuracy topic (again!), here's my two cents worth, taken from this thread in March:

http://www.ty4stroke.com/viewtopic.php? ... highlight=

Why O why O why O WHY can't (won't???) Yamaha calibrate their sleds' speedometers accurately – at LEAST within 1 or 2%??? Is that asking too much in this day and age... the 21st century... the computer age... Yamaha being the high-tech, top of the crop fit and finish company that it is??? Electric start, reverse, EFI, electronically controlled shocks, fancy gauge clusters, clocks... and speedometers that have typically been off by as much as 10-16%???

PLEASE Yamaha, do the right thing and have your engineers take the extra few minutes it'd take to calibrate your sleds' speedos accurately!

(This is NOT a bash, just something that's bugged me concerning ALL brands, and now that Cat FINALLY has very accurate speedos, it's about time everyone else has upped the ante on the accuracy of their speedos too!) – Roy

 

[Starry Knight]

If the GPS units are set to nautical miles, that could be causing a low number too, couldn't it?

 

[snowbeast]

One thing I noticed with comparison to my GPS is that the odometer seems accurate while the speedo is way off. I have no clue how this can be, but my GPS odometer was exactly the same as speedo odometer after about 110mile trip. Maybe I lost signal for a bit, I’m not sure. I will be grinding a tooth or two out of my speedo gear as well. I’ll try 1 tooth at a time. Hopefully my odometer won’t be way off. Thanks dano,please post your results,both about your milage and what your gps readings vrs speedo are,and if you have a chance your top gps you could safelt do,thanks .Pete


Dan

 

[QCRider]

So, these high mph readings could be lack of traction ? Get the power to the ground and it might be more accurate.....

Maybe a LITTLE, but don't think that will solve the problem. at 112 on the speedo I was at 100 on GPS and I have a 168 studs that are not slipping at all.

 

[QCRider]

Why have one if it's not going to be accurate? A better question is why does Yamaha NEED to calibrate it to read 15mph high?

Every brand calibrates their speedos to read high. Yamaha just seems to do it a little more than the others. It is very intentional. However, in this day of GPS's it's time to stop. It makes them look foolish. I agree that traction is not the issue, my speedometer is wrong from 10 MPH all the way to 112.

 

[QCRider]

Pretty simple actually, I believe they do it to make their customers think they're going really, really fast. How many times have you heard sledders at a pit stop or on the forums calling out the numbers they saw on their speedos?

I'm not saying it's right, I just believe that's the reason it's done. Interestingly enough, sport bikes also seem to share the trait.

Weird eh? :itchy:

Absolutely correct.