Suzuki SV650 Riders Forum banner
1 - 12 of 12 Posts

·
Registered
Joined
·
701 Posts
Discussion Starter · #1 ·
OK, I picked up my(new-to-me) '08 SV650N this morning and had a 60mi. drive home. I thought the speedo was a little optimistic and I'm used to about 5%-6% high, but when I checked the SV against a GPS My speedo is running 10% over actual speed, any ideas????

Also what is the normal coolant temperature(at 70mph.) shown on the instrument panel??? I was thinking 185°-190°. My gauge was showing 170° or so. Ambient air temp. was around 75° at freeway speeds.

Thanks of any info you can give a new owner.
 

·
Registered
Joined
·
1,740 Posts
10% isn't unusual for motorcycles, and my SV with a 60 series front tire will be 10% off. With a 70 series, it will be 5% off.

The only fix I can think if is a Speedo Healer http://www.healtech-electronics.com/

As for temps, 170 does seem a little low for a 75 degree day. Could be your thermostat?

It could just be an unusual variance, see how it goes the next time you ride.
 

·
Registered
Joined
·
701 Posts
Discussion Starter · #3 ·
10% isn't unusual for motorcycles, and my SV with a 60 series front tire will be 10% off. With a 70 series, it will be 5% off.

The only fix I can think if is a Speedo Healer http://www.healtech-electronics.com/

As for temps, 170 does seem a little low for a 75 degree day. Could be your thermostat?

It could just be an unusual variance, see how it goes the next time you ride.
I have heard of the speed-o-healer, but never installed one. Oh, front tire is the correct one, a 60 series.

I too was thinking stuck thermostat, but I'm not going to get anxious to change it.
Having a temp gauge with actual numbers on it is quite a novelty to me. I'm used to bars or lines, anything but numbers!!!
 

·
Registered
Joined
·
384 Posts
I did a very detailed speedo vs gps a few weeks ago.

I think we can all agree the speedometer is not based on random numbers, but programed to be off.

This is my findings: Always subtract the left number from the total.


57-5=52 65-6=59 78-7=71

I found this to be true through out all speed ranges.

2006 SVN.
 

·
Registered
Joined
·
384 Posts
Mine is right on the numbers.

I had never given any thought to the process, but it makes perfect sense now.

I am sure if you change to a larger front tire there will be a same number system to get the true speed.
 

·
Registered
Joined
·
1,105 Posts
My '08 runs at around 168 or 169 on the highway in the summer, and when its cooler it will run at 164-5.
 

·
Registered
Joined
·
8,834 Posts
Also what is the normal coolant temperature(at 70mph.) shown on the instrument panel??? I was thinking 185°-190°. My gauge was showing 170° or so. Ambient air temp. was around 75° at freeway speeds.
170° is normal on a cool day. Mine runs in that range when ambient is anywhere from 35-80°F. On much hotter days it will run a bit higher.
 

·
Registered
Joined
·
701 Posts
Discussion Starter · #10 ·
Thanks to all!
I'll go with the temp. shown is pretty normal. But I'm going to do something with the +10% speedo error in the future.
 

·
Registered
Joined
·
1,617 Posts
Get the speedoDRD. It is smaller, costs less, and appears to be more waterproof than the speedo healer.


BTW, I've determined my speedometer to be off by 8.5%. It took a little bit of playing around with my speedoDRD to figure out the error exactly. I started with 10% (rough estimate), then 9%, then 8.5%. It's finally in sync with my GPS now.
 

·
Registered
Joined
·
8,834 Posts
Yeah, I'm a cheapskate. I just do the math in my head and go from there.

TrashCan is pretty much spot-on for those guesstimates. Just knock 10% off the displayed number for a fairly accurate speed.
 
1 - 12 of 12 Posts
Top