Just bought a new 2021 zforce 1000, and the first thing I noticed is that the speedo is way out to lunch.  Compared it to my GPS and at 10 mph its reading 23 mph, and the gap widens as the speed increases.  I read where by turning the key on with the two dash buttons down gets into the tire size calibration, but mine does nothing, even after holding the buttons for one minute.  Is there a way to get to a calibration screen?  I'm looking for a service manual for this unit too hoping it may have the answers I'm looking for.  Thanks for any input on the issue.

[2015 Z Force 800 53/Trail EPS]

Just bought a new 2021 zforce 1000, and the first thing I noticed is that the speedo is way out to lunch.  Compared it to my GPS and at 10 mph its reading 23 mph, and the gap widens as the speed increases.  I read where by turning the key on with the two dash buttons down gets into the tire size calibration, but mine does nothing, even after holding the buttons for one minute.  Is there a way to get to a calibration screen?  I'm looking for a service manual for this unit too hoping it may have the answers I'm looking for.  Thanks for any input on the issue.

The 2021 Z1000 outside of the US is the same as the 950 and with that different screen it's probably different...Soit still has the two buttons...somewhere... what does happen when you hold both buttons down for several seconds...with or without turning the key on at the same time?
Anyway whenever you do get to the calibration screen for your issue you will want to decrease the number value. I would start with just decreasing the first number two or three then fine tune once you within a few MPH with adjusting the others.

My '21 here in Canada is still the old zforce chassis so the dash is different than the 950.  The two buttons I only know of are the two little round ones on the front face of the dash panel directly above the rocker switches.  Is there any other buttons I may be not noticing?? 

[2015 Z Force 800 53/Trail EPS]

My '21 here in Canada is still the old zforce chassis so the dash is different than the 950.  The two buttons I only know of are the two little round ones on the front face of the dash panel directly above the rocker switches.  Is there any other buttons I may be not noticing?? 

No, those are the only ones. What happens when you have the key on and hold both buttons down for like 3-seconds?

CFM is still sending the old style 1000s to places other then the US? I can't grasp why they do some of these things. Lot of people would still buy them here.

With the key on and then push and hold both buttons, nothing happens.  Key on and press and hold right button only, nothing.  Key on and press and hold left button, changes the clock, units and dash dim.

[2015 Z Force 800 53/Trail EPS]

With the key on and then push and hold both buttons, nothing happens.  Key on and press and hold right button only, nothing.  Key on and press and hold left button, changes the clock, units and dash dim.

That's not only odd...but sucks as well...lol