speed/revs

[will]

people :D

my speedo is knackered and wont be repaired until tuesday

on friday i am on a bit of a tour on the SV.

could some kind soul post up the rpm in 6th at 60/70/80 and 120* on a standard 650SK3 so i can try not to get nicked for speeding, esp since part of my journey will be through the infamous M4 cameras!

*only joking :D

thanks!

Will

[TSM]

This is how you check your speed :roll:

http://www.abd.org.uk/gatso_photo_checking.htm

Example:

Suppose the vehicle passed 7 marks 5 feet apart in 0.5 seconds. Calculate as follows:

7 marks * 5 feet * 0.6818 / 0.5 seconds = 47.7 mph

You may need the following conversion factors:

Mph to feet per second: multiply by 1.46667
Feet per second to mph: multiply by 0.6818
Feet to metres: multiply by 0.3048
Metres to feet: multiply by 3.2808

[philc2000]

5000rpm in 6th is about 65mph according to my missus, and will be for another 500 miles...

[will]

This is how you check your speed :roll:

http://www.abd.org.uk/gatso_photo_checking.htm

Example:

Suppose the vehicle passed 7 marks 5 feet apart in 0.5 seconds. Calculate as follows:

7 marks * 5 feet * 0.6818 / 0.5 seconds = 47.7 mph

You may need the following conversion factors:

Mph to feet per second: multiply by 1.46667
Feet per second to mph: multiply by 0.6818
Feet to metres: multiply by 0.3048
Metres to feet: multiply by 3.2808

scientifically correct, but tricky to calculate at speed on the M4 :lol:

[Keitht]

This is how you check your speed :roll:

http://www.abd.org.uk/gatso_photo_checking.htm

Example:

Suppose the vehicle passed 7 marks 5 feet apart in 0.5 seconds. Calculate as follows:

7 marks * 5 feet * 0.6818 / 0.5 seconds = 47.7 mph

You may need the following conversion factors:

Mph to feet per second: multiply by 1.46667
Feet per second to mph: multiply by 0.6818
Feet to metres: multiply by 0.3048
Metres to feet: multiply by 3.2808

Sure I saw a calculator mod for the standard clocks on Ebay - may want to check that out as well :D :D

[will]

5000rpm in 6th is about 65mph according to my missus, and will be for another 500 miles...

ok, thanks.

[TSM]

This is how you check your speed :roll:

http://www.abd.org.uk/gatso_photo_checking.htm

Example:

Suppose the vehicle passed 7 marks 5 feet apart in 0.5 seconds. Calculate as follows:

7 marks * 5 feet * 0.6818 / 0.5 seconds = 47.7 mph

You may need the following conversion factors:

Mph to feet per second: multiply by 1.46667
Feet per second to mph: multiply by 0.6818
Feet to metres: multiply by 0.3048
Metres to feet: multiply by 3.2808

scientifically correct, but tricky to calculate at speed on the M4 :lol:

Yep, going though the speedtrap markings.

[Sudoxe]

5000rpm in 6th is about 65mph according to my missus, and will be for another 500 miles...

Isn't it 85?

Dan

[Carsick]

5000rpm in 6th is about 65mph according to my missus, and will be for another 500 miles...

Isn't it 85?

Dan
Nope. Indicated 68mph. We called it the 68mph shuffle, if you remember.
Oh how we laughed.


Will, I'll check out the revs at those speeds for you when I go out tonight, since I go on some fast roads.
Probably not gonna get the opportunity to check the 120mph on the a35, though.
Well, not till after midnight, anyway.

[Spiderman]

Best advice i can give is dont worry what speed you are doing.;)

just try and maintain the speed of most cars as they travel thru the speed camera markings.

And for regular travel just match or be slightly above a majority of the traffic and you can safelty assume you are doing about 80-90mph.

Just check your mirrors frequently for unmarked cars and change lanes when you can to show good behaviour to any unmarked cars that may be watching you.

hth

[will]

5000rpm in 6th is about 65mph according to my missus, and will be for another 500 miles...

Isn't it 85?

Dan
Nope. Indicated 68mph. We called it the 68mph shuffle, if you remember.
Oh how we laughed.


Will, I'll check out the revs at those speeds for you when I go out tonight, since I go on some fast roads.
Probably not gonna get the opportunity to check the 120mph on the a35, though.
Well, not till after midnight, anyway.

if 5000 rpm in 6th = indicated 68mph, is it right to assume that, if the bike does just over 13mph per 1000 rpm, that these speeds will apply eg

1000 rpm = 13mph
2000 = 26
3000 = 39
4000 = 52
5000 = 65
6000 = 78
7000 = 91

or am i missing something obvious here? #-o

my trip is tomorrow (friday) and i really dont want to be going without a rough idea of my speed! call me paranoid, but i like to know if i am running a risk of a pull from the police.

[jamesobrady]

I think the obvious thing you're missing is the gearing....lol...7000rpm in first wont be the same as 7000rpm in third etc...and so on.....
I find 5000rpm in 6th is about 60mph....but thats on a k5.

[Carsick]

I think the obvious thing you're missing is the gearing....lol...7000rpm in first wont be the same as 7000rpm in third etc...and so on.....
I find 5000rpm in 6th is about 60mph....but thats on a k5.
All of those were in 6th.

Will, that sounds about right to me.

[will]

ok, cheers carsick, and everyone else for the input.

[Stig]

just try and maintain the speed of most cars as they travel thru the speed camera markings.

And for regular travel just match or be slightly above a majority of the traffic and you can safelty assume you are doing about 80-90mph.

Just check your mirrors frequently for unmarked cars and change lanes when you can to show good behaviour to any unmarked cars that may be watching you.

hth

Yup I found this worked quite well for the rather lenghty time that I was "between" speedo's.