wes0778 Posted May 27, 2012 Author #26 Posted May 27, 2012 And that is why the reading will change. Only if it read the ring gear or ring gear teeth would it remain the same. The final ratio, and wheel rpm, will change for a given driveshaft rotational speed. In this case, the wheel RPM will be less, so the reading should show a higher reading than normal for a given road speed. Or is there something I dont know about how the sensor works? On any bike, when you make a gearing change AFTER the sensor, you will introduce speedometer error. (or possibly decrease it) Look on the FAQ page, question #11: http://www.healtech-electronics.com/ Brian, can't answer as to WHY, but on my bike 80 indicated has translated to 73 on the GPS and it is still this way. From what I'm told the RSV final has 10 teeth on the pinion and the VMAX has 9. Maybe it is just a weird coincidence that the reduction in road speed matches the increase in drive shaft speed divided by 9.
Guest tx2sturgis Posted May 27, 2012 #27 Posted May 27, 2012 Brian, can't answer as to WHY, but on my bike 80 indicated has translated to 73 on the GPS and it is still this way. From what I'm told the RSV final has 10 teeth on the pinion and the VMAX has 9. Maybe it is just a weird coincidence that the reduction in road speed matches the increase in drive shaft speed divided by 9. Hmmm....well it could be that the resolution of the LCD speedometer is a factor, since it jumps in 2.5 mph increments. The LCD 'needle' only jumps 2 notches from say 70, to 75 mph. in other words, 73 mph looks the same on the speedo as 76 mph. It apparently is staying in the 'ballpark'...and not enough of a change to be noticeable to the rider. Either way, let us know how you like it.
Guest tx2sturgis Posted May 27, 2012 #28 Posted May 27, 2012 Update: I beleive I have to concede this one. Forrest, after looking over where the sensor is actually mounted, and if the sensor actually counts the pinion gear teeth, and not rotational speed, as in rpm, then indeed, the reading would be the same with either pinion gear. Since the number of the pinion teeth passing by the sensor per second would be the same regardless of the number of them, then the pulses produced by the sensor would be the same pulses per second no matter the number of teeth, with respect to wheel RPM. I had assumed that the sensor triggers one pulse per rotation of the driveshaft but this was only an assumption. My apologies sir.
wes0778 Posted June 19, 2012 Author #29 Posted June 19, 2012 Ok, things are finally down to a mild enough roar that I can check the mileage with the new VMax rear gears. Total trip according to the GPS was 1995.6 miles. If I didn't miss any gas receipts we burned 53.474 gallons of gas. That translates to 37.31907095 mpg. My average fill up was 4.373 gallons per fill up so even if I missed up to two tickets my mileage was still 32.58 mpg. Not to shabby for 2-up pulling a trailer that weighed in at 90lbs on each trailer wheel and 25lbs on the tongue. Most of the trip up there was "back roads" with 55 and 60 mph speed limits. The trip back was mostly "slab" miles running 70-75 mph. So best I can tell the mileage for my bike is about the same even with the lower ratio gears. The exception is that in the hilly back roads I didn't have as much shifting to do.
gunboat Posted June 19, 2012 #30 Posted June 19, 2012 wonder were i've seen that motorhome before? don c.
Squidley Posted June 19, 2012 #31 Posted June 19, 2012 wonder were i've seen that motorhome before? don c. Oooh Oooh Oooh I know I know, Pick me Pick Me!
gunboat Posted June 19, 2012 #32 Posted June 19, 2012 Oooh Oooh Oooh I know I know, Pick me Pick Me! tag your it
Squidley Posted June 19, 2012 #33 Posted June 19, 2012 tag your it It was in Houston Texas with a bad top end!!!, what do I win!?
wes0778 Posted June 19, 2012 Author #34 Posted June 19, 2012 Oooh Oooh Oooh I know I know, Pick me Pick Me! :whistling::whistling::whistling:
Squidley Posted June 19, 2012 #35 Posted June 19, 2012 :whistling::whistling::whistling: Yep...That would be my big arse
wes0778 Posted June 19, 2012 Author #36 Posted June 19, 2012 Yep...That would be my big arse Good moon rising!!!! :cool10: :rotf::rotf::rotf::rotf::rotf::rotf::rotf: AND I can NEVER thank y'all enough!!!! :bowdown::bowdown:
Squidley Posted June 19, 2012 #37 Posted June 19, 2012 AND I can NEVER thank y'all enough!!!! :bowdown::bowdown: It was great fun helping you spend all your money
Caveman Posted June 21, 2012 #38 Posted June 21, 2012 (edited) quote... It was in Houston Texas with a bad top end!!!, LOOKS LIKE A BAD BOTTOM END TO ME! Edited June 21, 2012 by Caveman picture
BradT Posted June 21, 2012 #39 Posted June 21, 2012 LOOKS LIKE A BAD BOTTOM END TO ME! I was thinking the exact same thing.
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