.2
Flywheel
Holes maybe drilled in the flywheel to reduce weight
. It is
not allowed to reduce the outside diameter or to reduce
the thickness at any point.
A part, the weight of which is
quoted in the homologation sheet, may be machined for
the specific purpose of reaching the quoted weight only
.
It is not allowed to change the flywheel, but balance
machining is allowed if the dimensions and weights are
still correct.
As per Stock Class
As per Stock Class
FREE
.3
Conrods
It is allowed to reduce the overall weight of the Conrods
by removing the flashing on the shank of all three rods to
attain the weight specified provided for in the
homologation specifications
As per Stock Class
As per Stock Class
.4
+ Electrical
components
It is forbidden to remove any excess wiring; heat sensors
modify coils, to rewire coils or other components, to
tamper with CDI units or to add any electrical
components (starter etc.) or any other part that is not
standard original part.
It is allowed to remove any
excess wiring i.e. heat
sensors, rev limiters, low oil
sensors etc. It is forbidden to
modify coils, to rewire coils
or other components, to
tamper with CDI units or to
add any electrical
components (starter etc.) or
any other part that is not
standard original part.
As per Stock Class
FREE
.5
Head Volume
It is allowed to encroach into the squish pan area in the
skimming process as long as the minimum combustion
chamber is maintained. It is not allowed, should this
minimum be exceeded, to remove the metal within the
squish pan area to regain the lost volume. Measurement
of the head volume will be taken with the head removed
from the block.
As per Stock Class
No restrictions
.6
Head Volume
Measuring
procedure and
modification of
engine Ports
The head volume is measured off the block, using a glass
plate of minimum 3 mm thick. A burette calibrated in 50
cc increments to be used with a paraffin/oil mix of 50/50.
All head volumes to be taken with the spark Plug as used
and correctly fitted. The head is measured with no
gasket. All old gasket material is allowed to be cleaned
off. It is also allowed to clean all carbon deposits in the
head. The glass plate must be sealed with a thin layer of
marine grease
When ports in cylinders are adjusted to the dimensions
specified in the homologation sheet, material may only
be removed in the specified opening to a depth of 10mm
not including liner, to match the shape of the original
adjacent connecting passage (channel) outside the
adjusted port opening. This also applies to other
openings in the motor for which the dimensions are
specified in the homologation sheet. Should the modified
port window be smaller than the track, the track may not
be tampered with.
As per Stock Class
No restrictions
.7
Throttle advance
On various models, it is allowed to change the position of
the throttle cable link pin on the advance cam. It is not
allowed to modify the cam itself or change the radius on
the cam. [See 563.16.]
As per Stock Class
Free
.8
Cost of inspection
Costs may not be claimed in the case of a mandatory
inspection by race authority. The maximum costs that
may be claimed, by a driver from a protestor, should the
equipment found to be legal, are as follows:
LABOUR: Time may only be claimed to a maximum of six
hours at a rate to be determined by their local class
association or National Authority. Any excess will be
borne by the owner of the equipment. The above cost
excludes the cost of gaskets required or lubes which may
only be changed as per the recommended grade in the
workshop manual. Freight charges, where applicable, will
be charged as per the standard international rates.
As per Stock Class
As per Stock Class
.9
Technical
inspections
The O.O.D. or official scrutineer will be in charge. Only
the following may attend the post-race engine
inspections regardless of a protest being lodged. The
O.O.D - UIM commissioner - Measuring Officer - Driver
and his mechanic (or representative) - Protestor or his
representative - Any other person the O.O.D. requires,
with his permission. Note that in the case of a protest,
the protestor’s duty is to ensure that the inspection
complies with his protest requirements. He may not
however physically inspect the parts himself and should
not be allowed within a 5m radius of the equipment.
As per Stock Class
As per Stock Class
