joshuatest

Ok...

how does our bike calculate miles on the odo???

I changed to a 15/43 not to long back, and like it, but it seems like i'm reading more miles per tank of gas than every... that can not be possible, since in theory, i am running at higher rpm's than normal all the time...

So... Does the bike calculate from the front sprocket? or does overall gearing change it....

I was toying with putting the 16T front back in anyway, just to help for the highway speeds, and keeping the 43T rear... Will this correct my odo, or is this all in my head anyway....

In the lifted truck world, where you are going to bigger tires, you leave it alone because you start to decrease how fast your mileages calculates.. but I would hate to think i'm racking up mileage faster than normal... thats no good...

thanks for the input...

FL02SupaHawk996

http://www.speedohealer.com/eng/order.htm

joshuatest

Yea, I have seen that... But I couldn't care less how far off my speedo is, i'm talking about the odo...

What actually calculates my mileage on the odo, and what effect does the sprocket change have on that? in addition, will going back to stock front, but staying 43 rear return the odo to stock counting? or is it even off now?

thats what i am after...

thanks though

killer5280

It is electronic and is calibrated with stock gearing. Shorter gearing has the effect you are experiencing; it racks up the miles quicker and makes you think you're getting better mileage.

superbling

Yes it is run off the front sprocket. You removed the sender unit when you were changing the gearing. Only one sender for both speed and odo. A speedohealer or comparable can increase or decrease the signal. So you can set it for one or the other but not both independently.

Typically, the VTR odo is fairly close while the speedo is 10% off. So, your odo may be an exception.

Since you say you could care less about the speedo, unplug the sending unit and get a sigma BC1200 for $25 which can be very accurate if set up correctly. Not real ethical tho'.

joshuatest

So by returning front to 16T, but leaving 43T in the rear, I am helping the cause, but not curing it?

SuperBling...

This BC1200 does what? I don't care about my speedo being accurate, but would still like it working as I can judge by where it reads vs other vehicle speeds to get an idea how far away i am, which is fine with me...

I am not 100% against the Speedohealer, however hate to spend money on something like that if there is another alternative...

All i really care about is not racking up the miles faster.... Not a HUGE issue, but it does help with resale...

killer5280

Correct.

SuperBling...

I'm not Superbling, but I think he's saying that you can disconnect the stock VTR speedo/odo sending unit and hook up a Sigma bicycle odometer which is calibrated from wheel rotation.

joshuatest

ok... so forgive the ignorance...

but will using this Sigma unit going to allow me to use the odo on the stock cluster, or is this its own unit?

I've got a 03, which has the odo on the digital portion (not sure about all years)... and would really like that one to be as close to accurate as it can...

If i can fix that with the Sigma, i'm in... but if now, i may resort to the speedohealer as a fix... hmmm..

killer5280

You CAN unhook the VTR system all together and install a bicycle computer which will tell you speed and distance, etc. These can be had for 20 bucks and up. It's just not too ethical to unhook the VTR's system.

lhoward1134

If you check to see how far off your speed is, that is how far off your odometer is as well. If you are 10% Slow, you are putting on 10% more miles. I've never liked the mileage deal. I'd rather know how many times a motor rotated and in how many hours it did this rotating. That could tell you a lot about how the bike was ridden.

joshuatest

But if i do this, does it still who up on my digital portion of my cluster???

BeerHunter