Hi guys does anybody know weather or not the 1k 2005 has an electronically speedo cap in the sense that it will only show a certain speed and nothing after that or a restrictor as mine will only read 179mph totally stock apart from scorpion slip on but feels like it has more to give thanks in advance
When my 04 showed 170 on the speedo it was only actually doing 156 according to my gps. I don't think it had a lot more in it.
I agree with the above, depending on your gearing. Mines getting near the redline at 155 on the GPS on track think I may squeeze 160 out of it.. And mine has full akro filters and pc3
Why are bike speedos so inaccurate? At high speeds my car ones are maybe 3-4mph out, but 14mph at 170 is huge!
As far as I'm aware they have to read under as a safety device. The manufacturers don't want legal action taken against them because of speedo reading under ie speedo reading 70, bike doing 75 etc. They tend to be about 10% out so 14 at 170 not bad.
I recently had my RR5 on the dyno and in 5th when it was hitting the rev limiter the speedo was reading 178 mph but the dyno said it was 164 mph. Not sure if it had enough grunt to hit the limiter in 6th or not. I have always thought bike speedos over read by about 10%. Cars seem to be a bit better but not all. I once had a Peugeot (horrible piece of sh1t bar the 3.0V6 under the bonnet) that over read by 10% but my last 2 BMW's have been accurate by 2 mph up to high speeds. My current car a Volvo is so uninspiring to drive I don't care how far out the speedo is.
Amazing that there's a more accurate figure provided from your bike to outer space and back than travelling 3 foot up a fork leg or from a gear driven cable somewhere on your bike by the bike manufacturer. - JUST SAYING
I have an RR8 (different bike, I know), and on the autobahn last summer I saw 175 on the speedo (with fully laden Ventura luggage fitted and it definitely had more to go but I was getting worried that the luggage rack might snap off!) and GPS recorded max speed that day was 162mph, so it's not much more accurate. Should have guessed really as it's around 7-8mph out at 100mph
The speedo accuracy is deliberately made to over read. If you do a search, you will find some legislation/ law making sure this is the case. But what varies from one brand to another is the degree of calibration inaccuracy built into this. A GPS is not 100% accurate either. Depending on the number of satellites the lock on to, the accuracy can come down to 1m but for a moving target, this can be uo to 100! I don't know if you sat nav's do show the sattellites they have locked to and the posicional accuracy. I assume military grade GPS and those used on racing vehicles are a different beasts. In the early days of GPS, the us military (remember GPS is the property of the US government) deliberately added a wobble frewuency to the sat signal so thant consumer GPS receiver accuracy was never better than 100m!
A waas enabled garmin gives accuracy of less than 3 metres, 95% of the time so it's a lot more accurate than a bikes speedo. Race applications only have access to the same satellites so there's no reason why they should be more accurate.
The accuracy you talk about was 15m and not 100m with both gps and glonass systems, however it's more to do with your equipment that really dictates the accuracy, if your equipment can read both systems accuracy can be down to 5m theses days where as cheap ones with be a lot more
However if sprockets either +/- have been changed the speedo will have an even bigger difference when comparing speedo to gps speeds
In terms of the GPS itself (and not your hardware), the accuracy depends on the number the receiver sees and locks to. Don't know if you can see this on a sat-nav but my handheld GPS (and my nokia phone) shows the satellite status. with only 2 sat locked, the positional accuracy is anything between 60~100m accuracy. As more sat's are locked to this comes down to 3 (or maybe 1 if I am not mistaken when I had 6 sats locked). As you move around, you see some sat's loose lock and new ones locked to and the accuracy also goes up down like a yoyo. Which means the more observation points you have (satellites) the more accurate you can position the receiver. moving on from straight line speed, what I don't know is how the position of sports cars or bikes are shown accurately around a circuit while going all over the place not to mention atmospheric conditions (cloud, fog, rain). So there must be another positioning system set up locally (like the way a mobile network can help the GPS receiver in mobile phones (yes I know not all phone have built in receivers). MAybe someone does know how it is done
The highest the clock will read is 185 or 6. i cant remember which. That is irrelevant as the max design speed is around 175. Speedis affected by gearing and other nonsense. The bike is not restricted.
It was a gentleman's agreement amongst the Japanese manufacturers to restrict the top speed to 300 kph (186 mph)...so yes they are restricted but most struggled to reach this speed anyway...except at the pub of course where they all go over 200
