This is from the FIM technical Regulation:
LINK
QUOTE
2.4.2.2 Minimum weight adjustments
The minimum weights will be increased or decreased in steps of 3 kg
according to the following procedure:
1. By taking the race points of the riders of the best two 1000 cc
4 cylinders and best two 1200 cc 2 cylinders in each race an average
will be calculated after every event, the ‘event average’.
If there is only one finisher from one of the configurations, the ‘event
average’ will be calculated from the first rider of each configuration in
each race.
No ‘event average’ points will be calculated if one of the configurations has no finishers. The ‘event average’ will then be calculated, based on the results of the other race from the same event. If neither race has any finishers from one of the configurations, the event will not be considered.
2. ‘Wet’ races (as declared by the Race Director) are not taken in account
for the calculation of an ‘event average’.
3. After 3 events, the average value of the ‘event averages’ of each
configuration will be calculated. The score of the 1000 cc 4 cylinders
and the score of the 1200 cc 2 cylinders will be compared as follows:
• Should the average value of the ‘event averages’ over 3 events
favour the 1200 cc 2 cylinders by more than 5 points, and if a rider
of a machine with this configuration is leading the riders’
Superbike World Championship standings at that time, then the
minimum weight of all 1200 cc 2 cylinders will be increased by
3 kg. The upper limit is 171 kg.
• Should average value of the ‘event averages’ over 3 events favour
the 1000 cc 4 cylinders by more than 5 points, and if a rider of a
machine with this configuration is leading the riders’ Superbike
World Championship standings at that time, then the minimum
weight of all 1200 cc 2 cylinders will be reduced by 3 kg. The lower
limit is 162 kg.
If the minimum weight is not updated, then the results of three more events
will be considered, and a new average value of the ‘event averages’ will be
calculated over six events and so on, over multiples of three events, until
the points gap of the average value of the ‘event averages’ from the last
minimum weight update is higher than 5.
I have done the maths (hopefully correctly) :
Qatar
Race 1: 2-cyl = posns 1 + 2 = 45pts; 4-cyl = posns 3 + 5 = 27pts
Race 2: 2-cyl = posns 2 + 3 = 36pts; 4-cyl = posns 1 + 7 = 34pts
race average: 2-cyl = 45 + 36 / 4 = 20.25; 4-cyl = 27 + 34 /4 = 15.25
Philip Island
Race 1: 2-cyl = posns 1 + 3 = 41pts; 4-cyl = posns 2 + 5 = 31pts
Race 2: 2-cyl = posns 1 + 4 = 37pts; 4-cyl = posns 2 + 3 = 36pts
race average: 2-cyl = 41 + 37 / 4 = 19.5; 4-cyl = 31 + 36 /4 = 16.75
Valencia
Race 1: 2-cyl = posns 1 + 2 = 45pts; 4-cyl = posns 3 + 4 = 28pts
Race 2: 2-cyl = posns 2 + 7 = 29pts; 4-cyl = posns 1 + 3 = 41pts
race average: 2-cyl = 45 + 29 / 4 = 18.5; 4-cyl = 28 + 41 /4 = 17.25
Hence 3 event averages are
2-cyl = 20.25 + 19.5 + 18.5 / 3 = 19.416666
4-cyl = 15.25 + 16.75 + 17.25 / 3 = 16.416666
Hence difference is less than 5pts, so no weight penalty.
LINK
QUOTE
2.4.2.2 Minimum weight adjustments
The minimum weights will be increased or decreased in steps of 3 kg
according to the following procedure:
1. By taking the race points of the riders of the best two 1000 cc
4 cylinders and best two 1200 cc 2 cylinders in each race an average
will be calculated after every event, the ‘event average’.
If there is only one finisher from one of the configurations, the ‘event
average’ will be calculated from the first rider of each configuration in
each race.
No ‘event average’ points will be calculated if one of the configurations has no finishers. The ‘event average’ will then be calculated, based on the results of the other race from the same event. If neither race has any finishers from one of the configurations, the event will not be considered.
2. ‘Wet’ races (as declared by the Race Director) are not taken in account
for the calculation of an ‘event average’.
3. After 3 events, the average value of the ‘event averages’ of each
configuration will be calculated. The score of the 1000 cc 4 cylinders
and the score of the 1200 cc 2 cylinders will be compared as follows:
• Should the average value of the ‘event averages’ over 3 events
favour the 1200 cc 2 cylinders by more than 5 points, and if a rider
of a machine with this configuration is leading the riders’
Superbike World Championship standings at that time, then the
minimum weight of all 1200 cc 2 cylinders will be increased by
3 kg. The upper limit is 171 kg.
• Should average value of the ‘event averages’ over 3 events favour
the 1000 cc 4 cylinders by more than 5 points, and if a rider of a
machine with this configuration is leading the riders’ Superbike
World Championship standings at that time, then the minimum
weight of all 1200 cc 2 cylinders will be reduced by 3 kg. The lower
limit is 162 kg.
If the minimum weight is not updated, then the results of three more events
will be considered, and a new average value of the ‘event averages’ will be
calculated over six events and so on, over multiples of three events, until
the points gap of the average value of the ‘event averages’ from the last
minimum weight update is higher than 5.
I have done the maths (hopefully correctly) :
Qatar
Race 1: 2-cyl = posns 1 + 2 = 45pts; 4-cyl = posns 3 + 5 = 27pts
Race 2: 2-cyl = posns 2 + 3 = 36pts; 4-cyl = posns 1 + 7 = 34pts
race average: 2-cyl = 45 + 36 / 4 = 20.25; 4-cyl = 27 + 34 /4 = 15.25
Philip Island
Race 1: 2-cyl = posns 1 + 3 = 41pts; 4-cyl = posns 2 + 5 = 31pts
Race 2: 2-cyl = posns 1 + 4 = 37pts; 4-cyl = posns 2 + 3 = 36pts
race average: 2-cyl = 41 + 37 / 4 = 19.5; 4-cyl = 31 + 36 /4 = 16.75
Valencia
Race 1: 2-cyl = posns 1 + 2 = 45pts; 4-cyl = posns 3 + 4 = 28pts
Race 2: 2-cyl = posns 2 + 7 = 29pts; 4-cyl = posns 1 + 3 = 41pts
race average: 2-cyl = 45 + 29 / 4 = 18.5; 4-cyl = 28 + 41 /4 = 17.25
Hence 3 event averages are
2-cyl = 20.25 + 19.5 + 18.5 / 3 = 19.416666
4-cyl = 15.25 + 16.75 + 17.25 / 3 = 16.416666
Hence difference is less than 5pts, so no weight penalty.