2007 Hyosung GT250R speedo

[Weaver]

While riding down the road at what my speedo says to be 55 k's i've noticed that I seem to be holding up traffic. This never seems to happen in my car, in fact its quite the opposite, its other people holding me up.

So I decided to do a simple test. I got a friend to drive my car behind me while I did exactly 50k's, and then we tried it at 100k's.

The conclusion of the test was that when I was at 50k's the car was only doing 44k's. When I was at 100k's the car said 88k's.

Now you might be saying "how do you know your cars speedo is correct". Well, I drove past one of those displays on the roadside that display your current speed. It said 54 and thats what my speedo said.

I'd like to hear from some other GT250R owners, and weather they have noticed this.

Or is it just my bike

Cheers

[Kiwifire72]

HMMMMMM I notice cars wizzing by on the motorway hmmmmm
Maybe we need our friendly mr Police Biker mens to do some speed tests for us??????
I will contact one and ask

[rphenix]

hehe id love to go faster, but i dont think this problem is on the GT or GV :( I certainly dont hold traffic up.

[Warren]

It is rather common for bikes (especially smaller ones) to have an optimistic speedo.

To check its accuracy you really need to take a GPS unit out with you and it will tell you your true speed.

[JimO]

the NZ 250 i bought for my boys reads 40ks when its doing 50

[Fub@r]

Just about every Hyosung owner will tell you that your speedo will be at least 5km/hr lower than whats on the dash.

Mine is 6km/hr but use 10km/hr as cant be bothered subtracting 6 :)

[carbacca]

its even worst up top

checking against the GPS

above 110kph i have noted differences of upto 16kph from the speedo

[Weaver]

It would be much appreciated if someone with GPS could post what the exact speeds are for 50 and 100.
From the trend we are seeing it would seem as though many of the GT250R top speed claims could in fact be along way out

[rphenix]

be interested in hearing from anyone else with a non digital dash if they think the speed is out on theirs?

Over the weekend I'll do some speed tests against the car.

[RantyDave]

There are the sprints at the weekend - if the weather holds out, anyway. That could provide an interesting insight into shown vs actual since the whole point of the thing is to measure accurately. FWIW Dreamer rode a GT250 at 147 and I think she was showing 160 odd.

Dave

[magicfairy]

There are the sprints at the weekend - if the weather holds out, anyway. That could provide an interesting insight into shown vs actual since the whole point of the thing is to measure accurately. FWIW Dreamer rode a GT250 at 147 and I think she was showing 160 odd.

Dave

And watch those sulky faces when they discover the true speeds.
BusaJim was showing over 300k on speedo, but clocked at 276K. :crybaby:

[karmakillernz]

I've always suspected my speedo of being between 5-10kph fast, so I always travel around 58kph in 50 zones and 110 in 100kph zones. I find I flow with the traffic much better doing this.

[Aa7]

be interested in hearing from anyone else with a non digital dash if they think the speed is out on theirs?

Over the weekend I'll do some speed tests against the car.

my GT250 analogue speedo is the opposite i think as i dont seem to hold up traffic but it seems that they are holding me back and it is reading under or just on 50. The other day I was riding up the hill from Orewa to Silverdale in the passing lane and I got pulled over and ticketed at 62km when my speedo was reading around 55. I didn't question the cop but was irked at getting ticketed for travelling the same speeds as the other cars in the passing lane and for forgetting that my speedo was reading wrongly. My flatmate is buying a GT250R in the next week or two and I'll ride beside him and test the differences between both of them and put on the GPS so we know how fast we are actually going.

[unrealone]

I've been aware of this since I first got my bike. Mainly due to the fact that there are many of those Speed Reading signs on the side of the road in my area.

I've worked out mine to be around 5 - 7KPH out in 50KPH areas. I can only assume its the same at other speeds such as 70KPH and 100KPH. However, I haven't been able to do any accurate tests. I tend to ride at 107KPH on the motorway and I don't seem to hold anyone up.

I've seen those 'Speedo-healers' around and am curious if anyone has tried them or know if they work. Apparently digital speedos are reknowned for being out.

Edit: Haha, I just noticed that all 3 paragraphs I just wrote started with 'I've"... sigh, I'm really quite bored at work!

[Weaver]

The sprints would be a good place to try it. Sadly I can't, I have less exciting shit to do.
I reckon its about 10% of the speed you are traveling at.

[RantyDave]

BusaJim was showing over 300k on speedo, but clocked at 276K.
Oh dear, much wailing and gnashing of teeth! I believe a mere R1 went faster than that too.

Personally I think I'm "good" for a hair over 200. But only a hair. We'll see....

Dave

[Cajun]

I've seen those 'Speedo-healers' around and am curious if anyone has tried them or know if they work. Apparently digital speedos are reknowned for being out.


I have a speedo healer on my bike, mostly due to fact suzukis are out on average about 7%(read high) then changed my gearing which made it out by something like 16% so speedohealer at 100kms .5km out compared to gps,

Biggest issue you will have is finding a kit so you can plug it in to a hyosung

[unrealone]

I have a speedo healer on my bike, mostly due to fact suzukis are out on average about 7%(read high) then changed my gearing which made it out by something like 16% so speedohealer at 100kms .5km out compared to gps,

Biggest issue you will have is finding a kit so you can plug it in to a hyosung

When I had my Suzuki FXR150 I had the same problem with its Digital Tach etc. Was advised to get a speedo-healer. I'll have a hunt around for something for the hyosung and let you know what I scrounge up.

[Pancakes]

my GT250 analogue speedo is the opposite i think as i dont seem to hold up traffic.................


.....................
From the trend we are seeing it would seem as though many of the GT250R top speed claims could in fact be along way out

I've posted more than a few times about how GT-R riders are claiming up to and over 170 top speeds while mine and all the anologue speedo GT's are 150 downhill with the same motor/gearbox finaldrive and at the same redline. I know the fairing must help a bit but that doesn't allow for 20k's at roughly 150. My bike isn't spinning it up at those speeds cos of wind resistance thats for sure!

[gw555]

be interested in hearing from anyone else with a non digital dash if they think the speed is out on theirs?

Over the weekend I'll do some speed tests against the car.

My speedo appears to be correct up to around 120k. I have ridden with two GTRs and they are both out by around 12k compared to my speed at 100k/h

I have checked my speedo against a car at 50 and 100 passing those speed signs and my speedo was reading <5k difference in both cases

At over 120k I think my speedo becomes a bit optimistic though as I dont believe the cagers are travelling at 130 and above in morning traffic on the Hutt Motorway

[Aa7]

i tested the speedo on my GT250 against an older model Garmin GPS today and found the following; at 50kmh on the speedo i am doing 54.7km but at 100km on the speedo i am doing 96.7km i wont post the others but it gets worse the higher it goes and is around 15kph out or more at speeds above that. This is the analogue dash and when the flatmate gets his GT250R (hopefully by Saturday if he chooses which shop he prefers to buy it from) i'll do the same on his bike and see how different the readings are.

[unrealone]

I've posted more than a few times about how GT-R riders are claiming up to and over 170 top speeds while mine and all the anologue speedo GT's are 150 downhill with the same motor/gearbox finaldrive and at the same redline. I know the fairing must help a bit but that doesn't allow for 20k's at roughly 150. My bike isn't spinning it up at those speeds cos of wind resistance thats for sure!

Might not have been stock? :rolleyes:

[bull]

mine reads high by 6/8km/h at both 100km/h and 50km/h.

[Fub@r]

Going past a speed trailer at 50kph it said I was doing 45kph

Riding with a mate of mine on a GSXR 750 with analoge dash riding at approx 120kph mine showed 130kph. At higher speeds using the GSXR I maintained a 10kph differential

[rphenix]

I've posted more than a few times about how GT-R riders are claiming up to and over 170 top speeds while mine and all the anologue speedo GT's are 150 downhill with the same motor/gearbox finaldrive and at the same redline. I know the fairing must help a bit but that doesn't allow for 20k's at roughly 150. My bike isn't spinning it up at those speeds cos of wind resistance thats for sure!

I remember reading somewhere someone thought the GT is faster than the GTR so who knows :) I ride the GV so I dont care lol I'm sure mines the slowest of the three models but I agree you would think the GTR would be a little bit faster due to aerodynamics.

[Weaver]

I imagine that the GTR is faster than the Comet. But not as people had thought. Admittedly the fairing adds wieght to the bike, from memory its about 16kgs, but it'll far more aerodynamic than the comet which dosen't have anything to deflect the wind

[Pancakes]

From trying different exhasts the Hyo' 250 (which is the same unit in all the models including the sprocket and ring, if you want different from std you have to have one made or find out who's had some made) I can say the top speed is limited in a big way by the pipe reaching maximum flow. Put a straight thru pipe on and it keeps revving out. As they loose power in lower gears too just above redline it's reasonably safe to say that its this restriction the bikes hit in top gear too. My GT had way more top end potential with the straight pipe on but I didn't want to over-rev it. This is what has always made me think the speedo's on one of the models are out, cos the drive train is identical on all three and at the same revs on the GT and GT-R the speedo's read different. I get mine back next week (it's been next week for a few weeks now, that slow boat from Korea must be slower than the slow boat from China!) and would be keen as to do a side by side comparo (closed road blah blah) with a GV and GT-R. Digital cams filming on the tanks so we can post the results?