[Badgator]

if i am traveling 70 MPH where should the reading on the tachometer be i have 26x13 --20 g roller weights

 

[pyfis]

I have the 19g sliders and if I remember correctly I turn about 5800 rpm at about 72 indicated mph. So if your sliders are doing their thing you should be seeing a little less than that.

 

[Badgator]

yeah it was about 5.2 i believe or maybe even 5 just wanted to make sure i was within range ty pyfis

 

[Mel46]

Speaking of Speedometer vs Tach reading, I took a 120 mile trip on my scooter a couple of days ago and averaged my speed at around 55 mph. The tach seemed to be a little above the 5K mark, which would mean that the tach was at +1K for every 10 mph. Is that about right? I thought the tach reading would be lowered at highway speeds.

 

[Scootereno]

With the stock roller weights that is pretty close to average.

 

[Mark-III]

my burgman, stock roller weights .... 6100rpm - 132km/h in GPS. in speedo 147..
if i drvening 100km/h (55mph) in GPS, then speedo was 115 km/h. reading + 15 more :shock: why?

 

[Buffalo]

Because the speedo's are set up to read faster than you are actually going. Why, no one really knows but it is common practice with motorcycles. Every one I have owned over 40+ years had a speedo that read faster than I was actually going. Most folks never noticed it until GPS came along and they started comparing the speed on the GPS to what the speedo said.

 

[12string]

I am running the 14 gram rollers in my K-05 and it did not affect the top end rpm's. 5 grand on the tach= about 55 mph.

 

[Buffalo]

I have noticed that as the belt wears the relationship between RPM on the tach and speed on the speedo changes. When the belt is new RPM in thousands is lower than speed (5,500 rpm = 60 mph). Partway through wear the RPM in thousands will equal speed (6,000 rpm = 60 mph). When the belt is about worn out RPM will be higher than speed (6,500 rpm = 60 mph).

 

[12string]

I have experienced the same thing with belt wear.

 

[cougsfan]

Because the speedo's are set up to read faster than you are actually going. Why, no one really knows but it is common practice with motorcycles. Every one I have owned over 40+ years had a speedo that read faster than I was actually going. Most folks never noticed it until GPS came along and they started comparing the speed on the GPS to what the speedo said.

I have noticed it long before GPS's. I notice it when I drive 5 mph over the limit and people in cars are still trying to run over me. We have lawyers and a "get into the rich guy's pocket" legal system to thank for this phenomenon.