[footballdan]

I'm at 83mph at exactly 6000 rpms, just wondering what everybody else is at. My 2008 650 has about 49,000 miles on it. Just curious.

 

[eye.surgeon]

80 MPH indicated on my 2009

 

[Chuck in Indiana]

I'm at 54 MPH (GPS) at 4000 RPM. Ratio that up, I'm at 81 MPH at 6000 RPM. I have a 16 tooth front sprocket.

 

[tmcgee]

80 MPH indicated on my 2009

Yeah, mine's close to that too.

 

[The Hill Boys]

Uphill/downhill? Into the wind or with it? Hot or cold? Fat or skinny? Orange or white?

 

[ozart]

I'm at 83mph at exactly 6000 rpms, just wondering what everybody else is at. My 2008 650 has about 49,000 miles on it. Just curious.

With stock sprockets (15/47), my speedometer says 81 mph at 6000 rpm.
My real speed is 74 mph.

With 14/47 sprockets, it says 76 mph at 6000 rpm.
Real speed 69.

- dunlop D607 on the front.

 

[Colin]

On my corrected faceplate speedometer, in top gear 5,000 rpm is 100 Kph or 62 .14 mph. 6,000 it should be 120 Kph or 74.56. The stock speedometer dial is not accurate.

 

[BluesCruiser]

I have the 16-tooth front sprocket and for what its worth I'm turning 5500 at an indicated 80 (maybe 73-75??). That's pretty much what I run on the interstates around here.

Dave

 

[Stromin'Nroman]

Which gear?

 

[footballdan]

Uphill/downhill? Into the wind or with it? Hot or cold? Fat or skinny? Orange or white?

I was on a freeway, not much wind, at night about 100 degrees...hehe! About 285lbs.

 

[coachchuck]

I always figured it to be about 75mph.
My rational: that is what I run on my commute. The speed limit is 70mph. Most of the traffic will do close to 75 in a 70 around here. My speedo reads about 82 at 6K rpms. The traffic is some passing me and some slower than me, an equal balance, so it should be just about 75mph.
As you can see it don't have an exact science the way I do it.

 

[rconti]

Spent a loooot of time comparing speed vs RPM on my recent trip when there wasn't much else to do!

6krpm on my stock Wee is almost dead on 120kph, ~74.5mph.

Edit: GPS, that is. I barely even know where the stock speedo is located. I think sometimes my radio blocks it. I don't look down there.

 

[braincellgenocide]

6,000 RPM is about 70mph actual, and ~75 indicated. I have a 14t sprocket on the front.

On my Denver to Detroit trip when I put the stock 15t back on it was about 75 actual and ~80-81 indicated at 6k RPM.

 

[BluesCruiser]

Looks to me like changing the front sprocket makes about a 500 rpm difference up or down.

At 6000 RPM...
14-tooth = ~70 MPH
15-tooth (stock) = ~75 MPH
16-tooth = ~ 80 MPH (although I usually ride at 5500 for an indicated 80 MPH)

Now I have to wonder how much difference these changes make in the MPG we get. As far as I can tell, I get about the same mileage with my 16-tooth as folks get with the stock 15-tooth sprocket (50-55 MPG in a mix of riding).

Dave

 

[Tollster]

Speedo indicates 86MPH with a 15/45 sprocket combo, which equals a 3.0 final ratio...same as stock.

 

[Dino M]

15/43 sprockets
3000= 45mph
4000= 60mph
5000= 75mph
6000= 90mph
All are indicated speed and RPM