Odometer input source and correction factor
 

Hi guys. I installed a 15T front sprocket and calibrated my speedometer using a SpeedoHealer input a negative 6.7% for the sprocket change.

Again using the SpeedoHealer, I input a negative 7.4% for the OEM speedometer offset as the 2005 bike seemed to have come from the factory at 7.4% higher reading than acutal speed on the speedometer based on several GPS readings at samplings of 30, 60 and 80 mph.

I'm negative 14.1% on the SpeedoHealer now, and the speedometer quite nicely is dead-on.

BUT!!!... is the odometer now off by 7.4% or 14.1%? I want to see how much my gas milage has changed.

Both the odometer and the speedo are driven by the same sensor. My understanding is that both of them have been adjusted and are now correct. So you will have altered both the same percentage.

Based on my personal experience (having tested the odometer on test strips located on som eof our Canadian highways), the odometer on Canadian VTRs (which operate in kms) are dead-on with stock gearing. Not sure if this also true with US models. One other thing, there is some info on the SpeedoHealer Web site indicating that it is quite comon on modern bikes for the odometers to be accurate while the speedos are optimistic (as is the case with teh VTR). I would suggest, then, that if your speedo is now dead on, that your odometer is now reading optimistic by 7.4%.

cheers
Mikstr

I just did the Speedohealer and I love the results. I use to ride 100.5 miles a day to school on the stock gearing. Now that I have adjusted it using the S-healer (41-43 tooth rear) to be correct, I ride the same ride to school and now I show 93.3 miles round trip. My speedo was indicating 90mph at 80mph on the GPS. Now it is dead on 80 at 80! So I believe it has adjusted the O-meter too, though not perfect but better!

I have a sigma computer and a 15t front. Compared to it, the speedo is WAY off but the ODO is close (sigma 100mi to stock 103).

I'm running the same gearing. Thanks for the info!

here's some interesting info. Since my sprocket change and Speedohealer install, I have been looking at my fuel milage. before the change I was showing 100.5 miles on the o-meter and it took less 3 gal to fill (2.7 gal), that's 37 mpg. Now after the change with all corrections made......I show 93.4 miles for the same ride and it take's 2.7 gal. to fill. That's 34.5 mpg...I think that alot more accurite at 80 mph. So I do believe that the shealer does correct things well. Just my .02

Looks like experiences of other members has proven me wrong!

I was only theorising, no practical experience with it. It is interesting how they are different, yet operate off the same sensor, and the speedo healer plugs into the sensor.

Hmmmm..........

Yep. Seems to be about a 7.4% change. Seems I'm getting 41 to 44 mpg now, after calibration calculations, which is down a few from 43 to 46 mpg.

Hey, less miles on the bike. What are you complaining about? :)

Grin.