Wow - unbelievable motorcycle video.

[308nato]

Originally posted by: JOSEPHLB
a link for an Excel worksheet that calculates speeds, depending on gear ratios, front sprocket size, rear sprocket size.. tire sizes.. etc..


Motorcycle Gearing

Just plug in different gearing, and get an ideal of the changes..

Thats nice, you changed the gearing ratio. It has squat to do with your speedo unless the sending unit is on the countershaft/output shaft.

 

[JOSEPHLB]

umm... ok.. whatever you say..

 

[308nato]

Originally posted by: JOSEPHLB
umm... ok.. whatever you say..

Squid

😕

 

[JOSEPHLB]

Do some research .. If you change the gearing on either the front or rear sprocket, your speedo is off

and of course.. like someone mentioned.. there is the Yellow Box fix that accounts for gearing changes, tire changes, etc..

 

[JOSEPHLB]

Gearing:
Size; A smaller sprocket in front or a larger one in rear will increase bottom end performance. The bike will pull stronger off the line and coming out of turns. But it will rev higher at cruising speed, use more gas and make more noise. A larger front sprocket or smaller rear will do the opposite. We find that most riders feel a sufficient change by going one tooth smaller in the front or two to three in the rear. More than two teeth larger in the rear will require a new longer chain.


Just looked up where the speed sensors are on some bikes as well.. on the Honda's , it comes from the counter shaft sprocket...
the front wheel crap is nonsense..

 

[Damage]

Ok.. ONE MORE TIME..

NEW SUZUKIS RUN A COUNTERSHAFT SPEEDO PICKUP.. front wheels don't matter..

Why did the speedo keep climbing with the FRONT WHEEL IN THE AIR!!!!..

Countershaft pickup.. thank you...

Check Steve's page Yellow box to fix the speedo error.. lots of other TL1000 gearing info too.

(edit to add Steve's link)

 

[FrustratedUser]

That looks really fake to me.
Look at the road and how fast he is passing intersections.

Smells 'Modified speedometer' long way.

 

[JOSEPHLB]

FrustratedUser.. its not fake..

Motorcycles speedos are way off...especially if the bike is modified.. this applies to most everyday sport bikes..

and just as Damage has stated... the speedo is derived from a sensor which is located on the COUNTERSHAFT
Not the FRONT WHEEL.. this applies to most sportbikes.. if not all..

 

[Damage]

The switch was made about 3-5 years on various models to an electronic Tach & Speedo.. Older sportbikes still have mechanical cables.. (like my 88 Ninja)

 

[FrustratedUser]

Originally posted by: JOSEPHLB
FrustratedUser.. its not fake..

Motorcycles speedos are way off...especially if the bike is modified.. this applies to most everyday sport bikes..

and just as Damage has stated... the speedo is derived from a sensor which is located on the COUNTERSHAFT
Not the FRONT WHEEL.. this applies to most sportbikes.. if not all..

It sure doesn't look like he is going 220mph. Look at the road!!! See the patches and side roads he is passing?
Just change the gearing of the speedo.

 

[InFecTed]

You guys should check this video

link

Great stuff😎

 

[Bulk Beef]

Joseph, if the speedo is driven off either wheel, as is the case with almost every bike out there, then gearing changes will make no difference to the reading of the speedo. If the speedo is driven off the countershaft, as on several late models, then yes, the speedo reading will change. Dig?

 

[Damage]

Originally posted by: FrustratedUser

Originally posted by: JOSEPHLB
FrustratedUser.. its not fake..

Motorcycles speedos are way off...especially if the bike is modified.. this applies to most everyday sport bikes..

and just as Damage has stated... the speedo is derived from a sensor which is located on the COUNTERSHAFT
Not the FRONT WHEEL.. this applies to most sportbikes.. if not all..

It sure doesn't look like he is going 220mph. Look at the road!!! See the patches and side roads he is passing?
Just change the gearing of the speedo.

The speedo ISN'T geared.. It's ELECTRONIC..

A sensor reads the countershaft speed (the output shaft of the motor), and it reads the GPS (Gear Position Sensor) and all that information goes to the Electronic Control Unit, where speed is calculated and a signal is sent to the electronic spedometer to show the appropriate value.

It is easier than manufacturing all the little gears and spacers and cables and crap. and it weighs less.

 

[Damage]

# 12 and #13 (Image 28-1) are the electronic speedo pickup and sensor for the Suzuki GSX1300R Hyabusa.

Nowhere (Image 52-1) on the front wheel or rear wheel is there a pickup..

Thank you...😉

(edit, links don't take you directly to the picture sorry.. use the image #'s)

 

[FrustratedUser]

Originally posted by: Damage

Originally posted by: FrustratedUser

Originally posted by: JOSEPHLB
FrustratedUser.. its not fake..

Motorcycles speedos are way off...especially if the bike is modified.. this applies to most everyday sport bikes..

and just as Damage has stated... the speedo is derived from a sensor which is located on the COUNTERSHAFT
Not the FRONT WHEEL.. this applies to most sportbikes.. if not all..

It sure doesn't look like he is going 220mph. Look at the road!!! See the patches and side roads he is passing?
Just change the gearing of the speedo.

The speedo ISN'T geared.. It's ELECTRONIC..



A sensor reads the countershaft speed (the output shaft of the motor), and it reads the GPS (Gear Position Sensor) and all that information goes to the Electronic Control Unit, where speed is calculated and a signal is sent to the electronic spedometer to show the appropriate value.

It is easier than manufacturing all the little gears and spacers and cables and crap. and it weighs less.

Then it's a pice of cake to modifiy it. It hust does not look real. I've driven close to 200km/h and the suroundings do not look that slow.

 

[Bulk Beef]

A sensor reads the countershaft speed (the output shaft of the motor), and it reads the GPS (Gear Position Sensor)

Not to pick nits, but it doesn't have to read the gear position. The output shaft and rear wheel speed are directly proportional, regardless of what gear you're in. The only info needed is the RPM of the front sprocket. IOW if you're going 100 mph, the front sprocket will be spinning at the same speed whether you're in 3rd or 6th, or neutral for that matter.

 

[jamautosound]

I've driven 140 mph before, in a car, and things zipped by much faster than when this guy's speedo hit the 140 mark on the way down.

I don't believe it. Yeah, he's good at wheelies, sure he's going fast, but not 220 mph.

Ok, I just did some math. PLEASE, correct me if I'm wrong. Using the seconds meter on Windows Media Player.

10 seconds = starting out
10 more = he hit's 120
9 more = he hit's 200
3 more = he's at 220
20 second @ 220 mph = 1.2 miles

plus counting the other 22 seconds at above 120 mph, say .8 miles = 2 miles driven (conservative total.)

How come then, when he starts out his odometer shows 157 and when he stops it show 158? It looks like it changes to 158 about 2 or 3 seconds after he hits 220 mph. Which would mean it should show 159 after the twenty seconds, correct?

I know there are some math wizards on this board. If I'm incorrect, please correct me.🙂

 

[wnied]

Thats Kilometers per hour bub....big difference.

I trucked along at 160mph in my old 89 GT, and things looked a little faster than that video.
~wnied~

 

[Fausto]

Originally posted by: wnied
Thats Kilometers per hour bub....big difference.

I trucked along at 160mph in my old 89 GT, and things looked a little faster than that video.
~wnied~

No it's not. Look carefully at the speedo... the inner numbers are kph and go up to 300ish, outer numbers are mph and go up to 220.

FWIW- a stock 'Bus will do about 190 (real, not indicated) or so IIRC.

 

[jamautosound]

I also just noticed he hits 220 @ 10,000 rpm and then takes it up to 11,000 rpm.

I'm tired of the math thing. Someone else figure out how much faster he's supposed to be going.

 

[Damage]

Originally posted by: sward666

A sensor reads the countershaft speed (the output shaft of the motor), and it reads the GPS (Gear Position Sensor)

Not to pick nits, but it doesn't have to read the gear position. The output shaft and rear wheel speed are directly proportional, regardless of what gear you're in. The only info needed is the RPM of the front sprocket. IOW if you're going 100 mph, the front sprocket will be spinning at the same speed whether you're in 3rd or 6th, or neutral for that matter.

Gotcha.. I thought some makes went through the GPS.. I DOUBLE checked the TL1000 wiring diagram, and it goes straight to the speedo cluster..

The speed will still register wrong if you change the gearing. You know how fast the Fr sproket is spinning , but not how big/small it or the rear is.

Thanks for the catch on that, it made me double check!