Forza 300 Speedo inaccurate

Having trouble? Need more info on something mechanical? Ask here!

Moderator: Modsquad

Forza 300
Regular User
Regular User
Posts: 100
Joined: Thu Feb 27, 2014 8:20 am

Forza 300 Speedo inaccurate

Post by Forza 300 »

Has anybody notice there speedo reads higher then actual speed , ( I used my gps to check) mine reads 6 k.p.h. too high ! I know there is a+ or - tolerance but to me this is way off ,what happens when the tires wear and the overall diameter is smaller ? The wheels go faster and my speedo will read even higher! I'm going to look into this as I have some contacts at honda Canada.
User avatar
gn2
Forum Benefactor
Forum Benefactor
Posts: 7767
Joined: Tue Dec 06, 2011 7:54 pm
Year: None
Location: NE Scotland

Re: Forza 300 Speedo inaccurate

Post by gn2 »

Most speedos read high by up to 10% but will never under read.
Four decades on two wheels has taught me nothing, all advice given is guaranteed to be wrong
Forza 300
Regular User
Regular User
Posts: 100
Joined: Thu Feb 27, 2014 8:20 am

Re: Forza 300 Speedo inaccurate

Post by Forza 300 »

The speedo on my 2010 sh150 is 1 kph high,the speedo on my st1300 was bang on, the speedo in my 2012 silverado is 2 kph high,the speedo in my 2008 honda fit is 2 kph high,the speedo in my 2013 honda fit is 2 kph high , I agree with you on most speedos read high but man does the speedo read way too high on the 2014 forza 300 ! To me it's way too inaccurate I can't remember the speedo tolerances allowed in canada ,but I will look into it.
Forza 300
Regular User
Regular User
Posts: 100
Joined: Thu Feb 27, 2014 8:20 am

Re: Forza 300 Speedo inaccurate

Post by Forza 300 »

Ok found some info according to manufacture engineer standards J1226 electric automotive speedos (at 90 kph and range ) the allowable range for speed is 4%of the highest reading shown on the speedometer that means on the forza + or - 6.4 kph so it's within these specs at 90 kph and above but mine is out of wack below 90 kph ,even at 65 kph and that's with new tires wait until the tires wear down to the wear markers in 10000 kilometers or less!
User avatar
gn2
Forum Benefactor
Forum Benefactor
Posts: 7767
Joined: Tue Dec 06, 2011 7:54 pm
Year: None
Location: NE Scotland

Re: Forza 300 Speedo inaccurate

Post by gn2 »

Simple and best solution is stop using your gps.
Four decades on two wheels has taught me nothing, all advice given is guaranteed to be wrong
~Cheap_Ride~
Regular User
Regular User
Posts: 257
Joined: Sat Jul 06, 2013 2:10 pm

Re: Forza 300 Speedo inaccurate

Post by ~Cheap_Ride~ »

I have owned a few scooters over the years and found that not one of them had an accurate speedometer in them.

When I modded my Zuma with a 70cc kit and racing pipe I could no longer use the Zuma speedo as it would not read past 45 mph. I used a hand held Garmin GPS unit that I mounted on the bars. Worked great and gave me a more accurate reading for how fast I was traveling.
User avatar
skuuter
Frequent Poster
Frequent Poster
Posts: 500
Joined: Tue Nov 08, 2011 11:31 am
Location: Estill Springs, Tennessee

Re: Forza 300 Speedo inaccurate

Post by skuuter »

gn2 wrote:Simple and best solution is stop using your gps.
............... :lol: :lol: :lol: .....my FORZA only reads 2 mph faster than my ZUMO GPS at 60 mph.....more accurate by far than "most" of my Motorcycles and Scooters over the years..... ;) ...the only Ones I've ever owned that matched the ZUMO was a 2008 Gold Wing 1800, 2007 Triumph Speed Triple, and a 2013 Gold Wing 1800 F6B.......the FORZA represents the most accurate Scooter I've owned to date..... 8)
Ridin' and Socializin' the Southeastern USA on a 2014 Honda FORZA 300 Scooter...45+ years of Riding averaging 30,000 miles per year...!!!
mikecalderone
Regular User
Regular User
Posts: 80
Joined: Sat Apr 12, 2014 5:54 pm
Location: Southern California, USA

Re: Forza 300 Speedo inaccurate

Post by mikecalderone »

That is great to know. My Suzuki Burgman is exactly reading 10% higher.
I'm glad to hear that the Honda Forza is speedometer in the USA is almost accurate. 8)
My Rides:
2017 Suzuki Burgman 650 Executive
2015 Honda CTX700ND

Previous Rides:
2014 Honda Forza 300
2005 Suzuki Burgman 650
2009 Burgman 400
2006 Kawasaki Nomad 1600
2005 Kawasaki Mean Streak 1500
2003 Honda VT750
1992 Honda elite
1986 Kawasaki KZ600 inline 4
1979 Honda CL350
1977 Honda SL125
mikecalderone
Regular User
Regular User
Posts: 80
Joined: Sat Apr 12, 2014 5:54 pm
Location: Southern California, USA

Re: Forza 300 Speedo inaccurate

Post by mikecalderone »

I posted this on the BurgmanUSA site, thought it might provide good information for this forum.

Way to go Honda!
I checked my speed today on the 2014 Honda Forza 300 via a Garmin GPS.
25mph -Good
45mph - Good
55mph - Good
65mph - good
75mph - Good.

The Speedometer was right the whole time. Maybe Honda could teach Suzuki how to do this, as it is important to know what speed your going.
My Rides:
2017 Suzuki Burgman 650 Executive
2015 Honda CTX700ND

Previous Rides:
2014 Honda Forza 300
2005 Suzuki Burgman 650
2009 Burgman 400
2006 Kawasaki Nomad 1600
2005 Kawasaki Mean Streak 1500
2003 Honda VT750
1992 Honda elite
1986 Kawasaki KZ600 inline 4
1979 Honda CL350
1977 Honda SL125
User avatar
you you
What's a wot?
What's a wot?
Posts: 10000
Joined: Sat Jun 30, 2012 5:37 pm
Location: Between Lulu and Chichi

Re: Forza 300 Speedo inaccurate

Post by you you »

mikecalderone wrote:I posted this on the BurgmanUSA site, thought it might provide good information for this forum.

Way to go Honda!
I checked my speed today on the 2014 Honda Forza 300 via a Garmin GPS.
25mph -Good
45mph - Good
55mph - Good
65mph - good
75mph - Good.

The Speedometer was right the whole time. Maybe Honda could teach Suzuki how to do this, as it is important to know what speed your going.

In relation to what?
mikecalderone
Regular User
Regular User
Posts: 80
Joined: Sat Apr 12, 2014 5:54 pm
Location: Southern California, USA

Re: Forza 300 Speedo inaccurate

Post by mikecalderone »

you you wrote:
mikecalderone wrote:I posted this on the BurgmanUSA site, thought it might provide good information for this forum.

Way to go Honda!
I checked my speed today on the 2014 Honda Forza 300 via a Garmin GPS.
25mph -Good
45mph - Good
55mph - Good
65mph - good
75mph - Good.

The Speedometer was right the whole time. Maybe Honda could teach Suzuki how to do this, as it is important to know what speed your going.

In relation to what?
To let Forza owners know that their Speedometers are correct.
My Rides:
2017 Suzuki Burgman 650 Executive
2015 Honda CTX700ND

Previous Rides:
2014 Honda Forza 300
2005 Suzuki Burgman 650
2009 Burgman 400
2006 Kawasaki Nomad 1600
2005 Kawasaki Mean Streak 1500
2003 Honda VT750
1992 Honda elite
1986 Kawasaki KZ600 inline 4
1979 Honda CL350
1977 Honda SL125
User avatar
gn2
Forum Benefactor
Forum Benefactor
Posts: 7767
Joined: Tue Dec 06, 2011 7:54 pm
Year: None
Location: NE Scotland

Re: Forza 300 Speedo inaccurate

Post by gn2 »

UK miles or USA miles?
Four decades on two wheels has taught me nothing, all advice given is guaranteed to be wrong
mikecalderone
Regular User
Regular User
Posts: 80
Joined: Sat Apr 12, 2014 5:54 pm
Location: Southern California, USA

Re: Forza 300 Speedo inaccurate

Post by mikecalderone »

I am from the USA. If you look at my post I'm from Laguna Niguel, CA
My Rides:
2017 Suzuki Burgman 650 Executive
2015 Honda CTX700ND

Previous Rides:
2014 Honda Forza 300
2005 Suzuki Burgman 650
2009 Burgman 400
2006 Kawasaki Nomad 1600
2005 Kawasaki Mean Streak 1500
2003 Honda VT750
1992 Honda elite
1986 Kawasaki KZ600 inline 4
1979 Honda CL350
1977 Honda SL125
User avatar
gn2
Forum Benefactor
Forum Benefactor
Posts: 7767
Joined: Tue Dec 06, 2011 7:54 pm
Year: None
Location: NE Scotland

Re: Forza 300 Speedo inaccurate

Post by gn2 »

USA miles then?
Four decades on two wheels has taught me nothing, all advice given is guaranteed to be wrong
waybar
Regular User
Regular User
Posts: 78
Joined: Sat May 10, 2014 7:20 pm
Location: Freeport, IL

Re: Forza 300 Speedo inaccurate

Post by waybar »

I installed a gps on mine and it was right on up to 55mph, didn't test it faster than that yet. Very accurate on mine anyway.
wolf39us
New Member
New Member
Posts: 42
Joined: Wed Apr 24, 2013 1:49 pm

Re: Forza 300 Speedo inaccurate

Post by wolf39us »

I've GPS confirmed my and my girlfriend's PCX... They are as dead on as can be!

If the speedometer says 60mph, it's doing 60mph!

My first bike the Kymco Super 8 was off by 5-6 Mph most of the time.
User avatar
Gingivitis Khan
New Member
New Member
Posts: 40
Joined: Tue Aug 13, 2013 1:26 am
Location: Waveland, MS, USA

Re: Forza 300 Speedo inaccurate

Post by Gingivitis Khan »

When I first bought my Forza, I tested the speedo with my GPS and it was perfect at any speed.
Image
BRed
Regular User
Regular User
Posts: 255
Joined: Thu Jul 17, 2014 10:34 pm
Year: 2023 XMax 300
Color: Grey and black
Location: Carolina

Re: Forza 300 Speedo inaccurate

Post by BRed »

The thing to remember about bike speedos is they're usually driven by one of the wheels....
most are driven by the front wheel, but the Forza is driven by the final drive or rear wheel...I haven't confirmed which yet.
But blip the throttle while idling on the centerstand and the speedo spins up when the rear wheel spins up.

On wheel driven speedometers, the unit is calibrated for a specific tire circumference.....
that means if you use a different sized tire or sometimes even the SAME sized tire from another maker,
the speedo goes farther out of calibration.

Most engineers wisely use the tallest tire they can find for calibration.....
from that, the shorter the tire, the more "optimistic" the speedo reading.

As someone else mentioned, from the manufacturer point of view, it's ok if your speedo reads a little high.....
but if it reads even 1mph low, you might be forced to issue a RECALL on the speedo and replace it.
That just happened here recently with a Chinese scooter.

But usually if you stick with the OEM tire style, the motorcycle speedos are pretty accurate these days....
I've had speedos where you just averaged out the extreme oscillations of the needle swing to estimate your speed. :lol:
BRed
Regular User
Regular User
Posts: 255
Joined: Thu Jul 17, 2014 10:34 pm
Year: 2023 XMax 300
Color: Grey and black
Location: Carolina

Re: Forza 300 Speedo inaccurate

Post by BRed »

I checked this out yesterday and confirmed the speedometer cable on the Forza 300 is driven by the final drive, visible from the right side, on top of the FD gearbox.
Forza 300
Regular User
Regular User
Posts: 100
Joined: Thu Feb 27, 2014 8:20 am

Re: Forza 300 Speedo inaccurate

Post by Forza 300 »

I will recheck my speedo in the spring time as now I put the taller tire michelin city grip 150/70-13 I'm going to guess it will be more accurate then the stock rear tire.
Post Reply