speedometer correction>>>>>>>>>?

At interstate speeds my speedometer, by my gps comparison, is a good 8 mph off. I'm going that much slower.
It seems as though the engine sounds happier at about 5000 rpm's, plus on the two lane highways--55 mph speed limit- the silverwing seems to get better fuel economy.
Has anyone ever tire'd up, went to a larger size , to try to correct this??
Also, what rpm does the clutches get to full engagement?
Thanks, Have a happy 4th...

It is a factory standard that the Silverwing Speedo is about 10% below actual.
A few people get more accurate then that, but 10% is the norm.
If this is important to you try the speedo healer:
http://www.healtech-electronics.com/products/sh/
Put in the year of your silverwing and whether or not it has abs.

Much easier than trying to change mechanical things.


Dan

Be advised that the Speedohealer not only alters indicated speed but, on a Burgman for certain and possibly on a Silverwing, will also affect the recorded mileage.

it works by re counting the pulses sent to the speedo.

In reality the Speedohealer should change the mileage if it also changes and corrects the speedo. If the speedo is reading 10% fast then mileage would also be 10% "fast". If someone is getting, let's say, 50 mpg with an incorrect speedo then the correct mileage would be around 45 mpg instead. This way both the speedo and mileage would end up being correct. My Wing reads about 6-7 miles faster than my GPS says I'm going. That would make my mileage reading off too. I may think I'm getting 50 mpg where I may actually be getting 45. No big deal either way with the exception of knowing how fast you are really going and how many miles per gallon you are really getting. But for $116 I'll stick with my "off" speedo. It doesn't really matter to me all that much. To some it might tho.

It's like my 1974 Honda CB 750. It has kph only seeing as it was made in Japan to stay in Japan. A serviceman bought it over there and shipped it home. Rather than change the speedo out for a mileage one I just figured it out in my head as to how fast I was going.

It seems to me 99% of all bikes speedometers are off by 5-10% at a 100kph regardless of make or model.  Always read slower than actual speed. At least it is on my swing and my suzuki GSF, my brothers virago, my friends vstar, my former HD Sportster........i've often pondered if manufacturers do it on purpose to slow bikers down?!?

Hotwings:
From what I understand there is some European requirement that vehicle manufacturers have that all speedometers require accuracy within a certain range and cannot be under reporting speed, or there is a big penalty to the manufacturer. So its actually a proactive measure against error in the other direction.

Dale:
I don't believe you are correct in that the odometer is deliberately off if the speedo is off.  I believe the odometer is meant to be accurate and the speedo is not.  But you can always check that by stopping at a mile marker on the highway, resetting the trip odometer and going 10 miles. Changing one will change the other, but they are designed for one to be accurate and the other not.

Colin:
Yes you are correct. It says on the website that one will change the other.

Note:
For those with a bike that is spec'd to a unit of measurement of speed you do not use, this device has a converter from MPH to KPH or KPH to MPH.  It will not change markings on your bike in any way, but will theoretically give you an accurate conversion reading.

Dan

Many people here subscribe to that view; it's a way of protecting drivers and riders from exceeding the speed-limits.
In my experience the 10% applies all through the speed range.

It's a bit of a generalization I know.