FM + F6 + F5 at Buttonwillow Raceway Park

In the F500 engine table, change the weight as follows:
Honda CBR600RR (03-13): "875 900"
In the F500 engine table, change the weight as follows:
Suzuki GSXR600 (03-13): "875 900"
In the F500 engine table, change the weight as follows:
Yamaha R6 (03-13): "875 900"

In the F500 engine table, change the restrictor as follows:
Honda CBR600RR (03-13): "29 28mm Flat Plate Intake Restrictor"
In the F500 engine table, change the restrictor as follows:
Suzuki GSXR600 (03-13): "29 28mm Flat Plate Intake Restrictor"
In the F500 engine table, change the restrictor as follows:
Yamaha R6 (03-13): "29 28mm Flat Plate Intake Restrictor"
Table 1
Car Engine Wheel
Width (in)
± .060
Aero Transmission Weight Notes
USF2000
Tube
Frame
2.0 Liter
Mazda MZR
See notes See notes See notes See
notes
Car must comply with the 2012
Pro USF2000 rules. Competitors
must have the current rules in their
possession and present them upon
request. The following sections of
the 2012 Pro rules do not apply:
14.1.1 thru 14.1.4; 14.12.2 thru
14.12.13; 14.13.1; 14.13.2; 14.13.5;
14.18 in its entirety; 14.19 in its
entirety; 14.27 in its entirety; 13.34 in
its entirety

Thank you for your letter. After reviewing the response to the WDYT published in the May 2020 Fastrack
Minutes, the Club Racing Board does not recommend this change.

Thank you for your letter. Please see the response to letter #28359 in this Fastrack.

In the F500 engine table, update as follows:
"Suzuki GSXR600 (03-13 19)"

In F500, GCR section 9.1.1.D.14, Snowmobile Derived Engines, add the following:
"Rotax 593 in a carbureted, non-HO or HO version;"
In F500, GCR section 9.1.1.D.14.A, add the following:
"38mm intake boots, BPP 420867860 (last 6 digits 867860 are embossed on the boot), BPP 420867862 (last 6 digits 867862 are
embossed on the boot), or Kimpex 07-100-33, shall be used for the 493 and 593 non-HO engines. 38mm intake boots, BPP
420867882 (last 6 digits 867882 are embossed on the boot) shall be used for the 2003 593 HO engine, and BPP 420867879 (last 6
digits 867879 are embossed on the boot) shall be used for the 2004-2007 593 HO engines."
In F500, GCR section 9.1.1.D.14.I.3, add the following:
"Rotax 593 non-HO (0.010" overbore): Rotax P/N 420889171"
In F500, GCR section 9.1.1.D.14.J.3, add the following:
"Rotax 593 non-HO engine only: Rotax OEM 0.010" overbore piston (P/N 420889171)."
In F500, GCR section 9.1.1.D.14.K, add the following:
"Rotax 593 non-HO engine only:"
In F500 Engine Table, add the following:
F500 Version/Model Weight
(lbs) Inlet Restrictor Outlet Restriction Notes
Rotax
593*
Carbureted HO
version (03-07) 875 MA0242SP1020A
or
MA0242SP1063A
Y-pipe exhaust
manifold and single
expansion chamber (ref
9.1.1.D.14.B)
Note 1 and 4. Restrictor size and
type is to be displayed by the
following designation: 593 RSTR

In F5, GCR section 9.1.1.D.6.B.4, make changes as follows:
"All gear changes must be initiated and made completed by the driver. Only mechanical gear shifting mechanisms are permitted.
This may include cables, rods, or other mechanical linkage systems. All other shifting mechanisms are not permitted. This
prohibition shall include electric solenoid shifters, air-shifters, etc. and other devices not mechanically actuated and controlled
completely by the driver. Devices that allow pre-selected gear changes and closed-loop systems that use feedback from sensors
to vary the timing of the gear selection process are also prohibited.
Devices that interact with the throttle, ignition, or fuel system during a shift operation (for example: ignitions cuts, flat shifters,
blippers) are permitted, but no such devices shall remove the driver's control of the gear change initiation, gear selection or
completion. The burden of proving that a device is in compliance with this rule shall be upon the competitor."

In F5, GCR section 9.1.1.D.1, change as follows:
"A class for single seat, open wheel, rigid limited suspension race cars using either a snowmobile-derived engine and drive
components or a 600cc motorcycle engine."

In F5, GCR section 9.1.1.D, add a new section as follows:
"19. All F5 cars competing in Majors Races and the Runoffs must have the AIM part #X47KPFSOLO2R0 data box mount installed
on the vehicle to provide the necessary mounting of the AIM Solo or Solo 2 data box. The mounting surface is to be approximately
oriented either horizontally or vertically either parallel or perpendicular to the longitudinal axis of the car and must be accessible
from the exterior of the car with the driver on board -- it should have a view of the sky and not be located under carbon fiber or
metallic bodywork. Sufficient space should be left between the mounting plate and the surface to which it is attached to permit
the use of zip ties/tie straps to restrain the data box to the mounting plate. The purpose of this requirement is to allow the
random placement of data boxes on cars on pre-grid by SCCA assigned personal and the collection of the box when the car exits
the race track. Contact AIM and their distributors for direct purchase."

In F500, GCR section 9.1.1.D.19, change as follows:
"All F500 cars competing in Majors Races and the Runoffs must have the AIM part #X47KPFSOLO2R0 data box mount installed
on the vehicle to provide the necessary mounting of the AIM Solo or Solo 2 data box."

In F500, GCR section 9.1.1.D.14.A, change as follows:
"Carburetor mounting shall must be of individual runners, with no balance pipes, and no plenums unless fitted as standard as on
the Rotax 493 and 593 engines. The use of the intake plenum/resonator on the 493 and the 593 engines is optional. If the intake
resonator is removed the resulting holes MUST be completely plugged and the plugs must be held in place by appropriate
clamps. Plugs may be of any material and must serve no other purpose than to plug the holes originally intended for the
resonator. 38mm intake boots, BPP 420867860 (last 6 digits 867860 are embossed on the boot), BPP 420867862 (last 6 digits
867862 are embossed on the boot), or Kimpex 07-100-33, or Moto Tassinari V-Force 3 Reed Valve System V3124-873B-
2 shall must be used for the 493 and 593 non-HO engines. 38mm intake boots, BPP 420867882 (last 6 digits 867882 are
embossed on the boot) or Moto Tassinari V-Force 3 Reed Valve System V3124-873B-2 shall must be used for the 2003 593 HO
engine, and 38mm intake boots, BPP 420867879 (last 6 digits 867879 are embossed on the boot) or Moto Tassinari V-Force 3
Reed Valve System V3124-873B-2 shall must be used for the 2004-2007 593 HO engines. Supercharging, turbocharging, and
direct fuel injection are prohibited."
In F500, GCR section 9.1.1.D.14, add a new section as follows:
"M. The stock oil injection pump, oil lines, and control cables may be removed from all Rotax engines. The oil injection ports may
be removed and plugged as necessary."

In F500, GCR section 9.1.1.D.15.G, add the following:
"The exhaust system and exhaust manifold are unrestricted, within SCCA safety regulations, except that
stepped diameter exhaust headers are not allowed. This prohibition does not include the exhaust flange area immediately
adjacent to the cylinder head."
In F500 Engine Table, Honda CBR600RR, Suzuki GSXR600, and Yamaha R6 spec lines, add the following:
"Stepped diameter exhaust headers are not allowed"

In F500, GCR section 9.1.1.D.14, add a new section as follows:
"N. Alternate ECU for Rotax engines: The use of the Ingi Tech Sparker ignition part number DCP-CDI-P2 is permitted."

In F500, GCR section 9.1.1.D.14.A, change as follows:
“Carburetor mounting must be of individual runners, with no balance pipes and no plenums unless fitted as standard as on the
Rotax 493 and 593 engines. The use of the intake plenum/resonator on the 493 and 593 engines is optional. If the intake
resonator is removed the resulting holes MUST be completely plugged and the plugs must be held in place by appropriate
clamps. Plugs may be of any material and must serve no other purpose than to plug the holes originally intended for the
resonator. 38mm i Intake boots, BPP 420867860 (last 6 digits 867860 are embossed on the boot), BPP 420867862 1 (last 6 digits
867862 1 are embossed on the boot), or Kimpex 07-100-33, or Moto Tassinari V-Force 3 Reed Valve System V3124-873B-2 must
be used for the 493 and 593 non-HO engines. Moto Tassinari V-Force V3120-794A-2 Reed Valve System may be used with any
allowed intake boot on the 493 and 593 non-HO engines. 38mm i Intake boots, BPP 420867882 (last 6 digits 867882 are
embossed on the boot) or Moto Tassinari V-Force 3 Reed Valve System V3124-873B-2 must be used for the 2003 593 HO engine,
and 38mm i ntake boots, BPP 420867879 (last 6 digits 867879 are embossed on the boot) or Moto Tassinari V-Force 3 Reed Valve
System V3124-873B-2 must be used for the 2004-2007 593 HO engines. Supercharging, turbocharging, and direct fuel injection
are prohibited.”