Hey has anyone seen this occur with a Suzuki Across? My speedo reads slow i.e. The speedo reads approx 65km/hr when the GPS reads 60km/h. I have to be doing approx 110km/h on the speedo for the GPS to read 100km/h. Could a worn speedo cable do this? There is a bit of a kink in it and it'd be the next cable I'd replace.
Hey Brad Can't say I have on an Across however a digital speedo on a Honda had nearly a 10 km variance at 100. I just bought an Across, last week to be exact and it seems that I am travelling much quicker than what the speedo reads. Curious to see if changing your cable remedies this problem. Phil
OK - I replaced the speedo cable with a second hand one from Ebay. Surprisingly, there is a diference in the speedometer reading. Now the speedo reads 110 when I'm doing 103km/h and reads just a tad over 60km/h when I'm doing 60. This is cross referenced with Garmin GPS unit. I'm of the suspicion a worn speedo cable could react differently in terms of torque through the inner spinning coil of the cable. I know this may all sound a bit pedantic, but hey, I'm a serial tinkerer.
Hey Revit I'm with you on this one, however after doing some research I honestly have no idea. There is so much conjecture on the subject of speedo readings that it is open to interpretation GPS readings get many ticks, however there is differing views on this also. Does anyone Know for sure, if yes please share it with us. My Honda CBR 1100 has a digital speedo and yet on the highway in a 110km zone I am passed by everyone, if I follow the traffic my reading is closer to 120km/h. Good luck and go figure. Phil
Lots of people speed though I 'calibrated' my old CB250 after a brake pad change (paranoid i'd made a mistake with the speedo gear) by following behind my sister's yarris (she is a speed nazi... if you're in the car with her and go just 2 km over the limit sh will scream at you, hence one of the reasons i got a bike...) seemed to be dead on, and on asking her she confirmed she had been sticking to the limit for the sections I was behind her... within reasonable margin of error for these things. Even so, I noticed in my day-to-day riding MANY people passing me when my speedo showed the limit. Some people just speed
Hey Artemis Speedo's are different on just about every bike. Mechanical ones have many parts connecting between the actual speedo and the engine or the sprocket. This can with wear vary a fraction from the actual factory setting. Digital ones can see variance far larger, some mechanics reckon up to 10% +. One evening whilst travelling home on the highway with speed limit of 110kmh, I was next to a car and noticed his speedo showing 110 and my Honda CBR showed 121, go figure. If I travel at the speed limit on my bike, I get passed by everyone. Guess it's subjective at best. Phil
Oh yes, I agree with you absolutely.. when I say 'within reasonable margins of error' I mean including such factors as wear and differences in speedos (my cb had a mechanical one her car a digi)... but at the same time, a LOT of people also play fast and loose with the sped limits... 85 km/h is not an uncommon speed down the mad mile (a road between upwey and FTG near where I live) , even at high traffic times, even though the posted limit is 70. So that too has to be taken into account when looking at people passing you
I haven't tested the bike yet but every car I have had the gps in showes that the speedo is on the low side compaired to the gps. I guess it is better to be going a little slow than get booked.
speedos will always over read on a bike or car no 2 speedos read the same either they always over read 1 went thro the timing lights in UK on an airfield runway at 204 mph speedo said i was traveling at 220 gps said 207 mph the timing lights are callabrated and are spot on :Thumbs_up:
yep i was hauling ass had to play with the gearing plus bike was set up on the dyno with a titanium full akropovic system and a custom mapped power commander was producing 187 bhp at the rear wheel some guys where suffering tyre deflation at that speed as the forces where bending the valves in the rim and letting air out we think as they found front tyres nearly flat after 2 runs here is the bike i owned
Very nice looking machine but loosing tyre pressure at that speed would be scary and even worse when you only have 2 wheels. lucky it was a straight run you were making.
yep it is very scarey thought i changes the valves to ones with thread instead of those standard rubber ones i never had that issue i was making sure it didnt seems to affect hayabusa more than the zx12r or zx14 must be the airflow over the wheel
I put the gps on the bike today and did a test run and found my speedo is reading a lower speed than the gps and the faster you go the bigger the difference. At least I know if I creep up over the limit i won't get booked. olice: I will just keep doing what I do now when in traffic keep up with every one else and when I am alone it doesn't matter how fast I am going I always have a smile on my face anyway. :Thumbs_up:
