ISO 7117:2010

INTERNATIONAL ISO
STANDARD 7117
Third edition
2010-02-15


Motorcycles — Measurement method for
determining maximum speed
Motocycles — Méthode de mesure pour déterminer la vitesse maximale




Reference number
ISO 7117:2010(E)
©
ISO 2010

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ISO 7117:2010(E)
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ii © ISO 2010 – All rights reserved

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ISO 7117:2010(E)
Contents Page
Foreword .iv
Introduction.v
1 Scope.1
2 Normative references.1
3 Terms and definitions .1
4 Symbols.2
5 Standard reference conditions .2
6 Preparation of test motorcycle .3
7 Rider and riding position.3
8 Measurement equipment and accuracies.3
8.1 Measurement equipment .3
8.2 Measurement accuracies.4
9 Test tracks.4
9.1 General requirements .4
9.2 Composition.5
9.3 Possible shapes and specific requirements.5
10 Atmospheric conditions .7
11 Test procedure and calculation of average speed.8
11.1 General requirements .8
11.2 Measurement .8
11.3 Single-direction test .9
12 Presentation of results.10
12.1 The maximum speed .10
12.2 Test report.10
Annex A (informative) Procedure for determining the acceleration distance .11
Annex B (normative) Presentation of results of maximum speed.15
Bibliography.18

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ISO 7117:2010(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 7117 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 22,
Motorcycles.
This third edition cancels and replaces the second edition (ISO 7117:1995), which has been technically
revised.
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ISO 7117:2010(E)
Introduction
In this third edition of ISO 7117, all the test methods and conditions such as accuracy of the measurement
system and climatic conditions are reviewed and updated for the purpose of obtaining the measurement
results of higher accuracy.
The test method and conditions on circle type test tracks, which are used in several regions, are also revised
substantially in view of the similarity with testing results on straight test tracks.
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INTERNATIONAL STANDARD ISO 7117:2010(E)

Motorcycles — Measurement method for determining maximum
speed
1 Scope
This International Standard specifies the method of determining the maximum speed of a motorcycle as
defined in ISO 3833.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 6726, Mopeds and motorcycles with two wheels — Masses — Vocabulary
3 Terms and definitions
For the purposes of this document, the terms and definitions specified in ISO 6726 and the following apply.
3.1
maximum speed
v
max
highest steady speed of test motorcycle
3.2
motorcycle kerb mass
m
k
motorcycle dry mass to which is added the mass of the following:
⎯ fuel: tank filled at least to 90 % of the capacity specified by the manufacturer;
⎯ auxiliary equipment usually supplied by the manufacturer in addition to that necessary for normal
operation
EXAMPLES Toolkit, carrier(s), windscreen(s), protective equipment, etc.
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ISO 7117:2010(E)
4 Symbols
Table 1 — Symbols
Symbol Definition Unit
A accuracy of measurement equipment of the measurement section length m
len
A resultant accuracy of speed measurement %
speed
A accuracy of time measurement equipment s
time
d relative air density during the test —
T
d relative air density at the standard reference conditions —
0
e resultant speed measurement error of system km/h
speed
L length of the measurement section of type 1, type 3 and type 5 test tracks m
st
L length of the measurement section 1 of type 2 and type 4 test tracks m
st1
L length of the measurement section 2 of type 2 and type 4 test tracks m
st2
p total barometric pressure during test kPa
T
p total barometric pressure at standard reference conditions kPa
0
T air temperature during test K
T
T air temperature at standard reference conditions K
0
t time to run the measurement section s
t time to run the measurement section in direction a s
a
t time to run the measurement section in direction b s
b
t time to run the measurement section test run i s
i
v motorcycle speed km/h
v average speed of motorcycle of two-direction tests km/h
ave
v motorcycle speed test run i km/h
i
v maximum speed of test motorcycle km/h
max
3
ρ air volumetric mass kg/m
0
5 Standard reference conditions
The standard reference conditions shall be as follows:
a) total barometric pressure, p : 101,325 kPa;
0
b) air temperature, T : 293,15 K;
0
c) relative humidity, H : 65 %;
0
3
d) air volumetric mass, ρ : 1,205 kg/m ;
0
e) relative air density, d : 0,931 9.
0
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ISO 7117:2010(E)
6 Preparation of test motorcycle
6.1 The motorcycle shall conform in all its parts and components with the production series or, if different, a
full description of such differences shall be included in the test report.
6.2 The fuel feed, ignition devices and the viscosity of the oils for the moving mechanical parts shall be in
accordance with the instructions given by the motorcycle manufacturer.
6.3 The lubricants shall be those prescribed by the manufacturer; the fuel shall be the commercial grade for
the type of motorcycle tested.
6.4 The motorcycle engine and transmission shall be properly run in, according to the manufacturer's
instructions.
6.5 Before the test, all motorcycle parts shall be stabilized at the normal temperature for the motorcycle in
use.
6.6 The test motorcycle mass shall be the motorcycle kerb mass.
6.7 The distribution of the load between the wheels shall be in accordance with the manufacturer's
instructions.
6.8 When installing the measurement instruments on the motorcycle, care shall be taken to minimize their
effects on the distribution of the load between the wheels and the additional aerodynamic loss.
6.9 Tyres shall be inflated to the pressure specified by the manufacturer.
7 Rider and riding position
7.1 The rider shall wear a close-fitting suit, a protective helmet, eye protection, boots and gloves.
7.2 The rider in the conditions given in 7.1 shall have a mass of 75 kg ± 5 kg and be 1,75 m ± 0,05 m tall.
7.3 The rider shall take the normal and safe riding position which is appropriate for attaining the maximum
speed of the motorcycle to be tested. The position shall allow the rider at all times to have proper control of
the motorcycle during the test. The position of the rider shall remain as stable as possible in order to avoid any
influence on the test results. The description of the position shall be given in the test report or may be
replaced with photographs (either during motion or in a static position).
8 Measurement equipment and accuracies
8.1 Measurement equipment
Test equipment to measure the motorcycle speed and the ambient atmospheric conditions shall be as follows:
a) electronic time counter or equivalent time measurement system;
b) photoelectric cell or equivalent sensor;
c) measurement equipment for the distance between photoelectric cells;
d) thermometer;
e) barometer;
f) humidity meter;
g) anemometer.
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ISO 7117:2010(E)
The photoelectric cell and electronic time counter system, or the equivalent system, shall be used to measure
the motorcycle speed. Care shall be taken with the set-up adjustment of photoelectric cells or equivalent
sensors (e.g. height of the sensors and the crossing point of the photo-beam and the motorcycle) so that the
required accuracy of the length of measurement section is secured. The details of the system shall be given in
the test report if the equivalent system is used.
The function and accuracy of test equipment shall be checked before use in the test.
8.2 Measurement accuracies
8.2.1 Accuracy of speed measurement system
The error of measured motorcycle speed is influenced by the total time to run the measurement section(s), t,
the length of the measurement section(s), L , the accuracy of time measurement equipment, A , and the
st time
accuracy of measurement equipment of the measurement section length, A .
len
The length of the measurement section shall be chosen with reference to instrument accuracy and to the
method of determining the running time, such that the actual speed is measured to an accuracy of ±1 %.
The accuracy of measurement equipment (e.g. the tape measure or the surveying instrument) of the
measurement section(s) length, A , shall be given in the test report.
len
The accuracy of time measurement equipment, A , is determined by the accuracy of the electronic time
time
counter system itself and the response time of the photoelectric cell sensor. A shall be given in the test
time
report.
8.2.2 Measurement accuracy of ambient atmospheric conditions
The accuracies of equipment used to measure the ambient atmospheric conditions shall be in accordance
with Table 2.
Table 2 — Accuracy
Parameter At measured value Resolution
Wind speed ±10 % 0,1 m/s
—
Wind direction 5°
Ambient temperature — 1 K
Barometric pressure — 0,2 kPa
Humidity ±5 % 1 %
9 Test tracks
9.1 General requirements
The test shall be carried out on a roadway that allows the maximum speed to be maintained over a
measurement section(s) as defined in 9.2. The entry section to the measurement section shall have the same
surface and longitudinal profile as the measurement section and be long enough to permit the motorcycle to
attain its maximum speed.
The test track shall be flat, level and smoothly paved. The road surface shall be dry and free of obstacles or
wind barriers that might impede the measurement of the maximum speed. The test track shall have not more
than 0,5 % longitudinal slope and not more than 3 % transverse slope, excluding the deceleration section(s).
The difference in altitude between any two points on the measurement section shall not exceed 1 m. However,
the slope to compensate the centrifugal force of loop type and circle type test tracks may be allowed.
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ISO 7117:2010(E)
The shape and dimensions of the test track and the location of the measurement section(s) shall be given in
the test report or replaced by the figure.
9.2 Composition
The test track shall consist of the following sections:
a) the acceleration section to reach maximum speed;
b) the maximum speed measurement section;
c) the deceleration section to safely stop the test motorcycle.
9.3 Possible shapes and specific requirements
9.3.1 The straight type test track
9.3.1.1 Type 1
The measurement section as shown in Figure 1 shall be located on the straight track. The acceleration
sections to the left and right of the measurement section shall be long enough to enable maximum speed to
be attained at the measurement section.

a
Measurement section.
b
Direction of motorcycle, a.
c
Direction of motorcycle, b.
Figure 1 — Test track type 1
9.3.1.2 Type 2
The two measurement sections, 1 and 2, whose lengths may be different, as shown in Figure 2, shall be
located at each end of the straight test track, and in a virtually straight line.

a
Measurement section 1.
b
Measurement section 2.
c
Direction of motorcycle, a.
d
Direction of motorcycle, b.
Figure 2 — Test track type 2
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ISO 7117:2010(E)
9.3.2 The loop type test track
9.3.2.1 Type 3
The measurement section as shown in Figure 3 shall be located on the straight part of the loop track. The
straight track lengths to the left and right of the measurement section shall be long enough to enable
maximum speed to be attained at the measurement section.

a
Measurement section.
b
Direction of motorcycle, a.
c
Direction of motorcycle, b.
Figure 3 — Test track type 3
9.3.2.2 Type 4
The two measurement sections, 1 and 2, whose lengths may be different, as shown in Figure 4, shall be
located at each end of the straight test part, and in a virtually straight line.
The straight part before the measurement section shall be long enough to enable maximum speed to be
attained at the measurement section.

a
Measurement section 1.
b
Measurement section 2.
c
Direction of motorcycle, a.
d
Direction of motorcycle, b.
Figure 4 — Test track type 4
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ISO 7117:2010(E)
9.3.3 The circle type test track
9.3.3.1 Type 5
The measurement section shall be an arc shape with a constant radius as shown in Figure 5 and the
measurement section length, L , shall be measured along the test motorcycle path or shall be geometrically
st
calculated from the chord length.

a
Measurement section.
b
Direction of motorcycle, a.
c
Direction of motorcycle, b.
Figure 5 — Test track type 5
9.3.3.2 Requirements for type 5 test track
For maximum speed measurement on the circle type test track, track 5, the following conditions shall be met:
a) the radius of test track shall be large enough to allow the motorcycle to attain the maximum speed;
b) the test motorcycle shall trace a line that enables it to attain its maximum speed without extra weight shift
effort by the rider;
c) the maximum speed shall be measured only on one measurement section.
NOTE The measurement section length may be extended to the entire test track circumference provided all
applicable tolerances are met. For this lap test, it is strongly advised to pay special attention to ensure that the climatic
conditions specified in Clause 10 are satisfied all over the measurement section if wider variation in those conditions is
anticipa
...