Wording removed by a change is shown struck through, as in the original. 4 changes, 0 other letters.
Changes made
Please correct omitted punctuation
#34890 from Club Racing Board · Rule change · TB 23-10 (2023-09 Fastrack)
In Cars and Equipment, GCR section 9.3.33.B.2, add the following: "(Effective 1/1/2024) A red taillight meeting FIA Standard 8874-2019, Technical List No. 76, is required on all Formula (open wheel) and Sports Racing cars." In Appendix F. Technical Glossary, Minimum Weight, change as follows: "Minimum Weight: – Weight specified with driver, exactly as they come off the race circuit, at the conclusion of any race or qualifying session." In FA Table 1, Spec Line E notes, add the following: "Any BD series iron or alloy cylinder block and alternate crankshaft permitted."
Show 8 more lines
In FC, GCR section 9.1.1.B.11.c, change as follows: "The Mazda MZR LF-DE 2 liter for use only in USF2000 cars, as described in the Spec Line Cars Table below."" In F600, GCR section 9.1.1.D.14, add the following: "Rotax Model 494, Model 493, and Model 593 must use a single expansion chamber and must be equipped with a pull starter; an electric starter may be added." In P1, GCR section 9.1.8.B.J.2, add the following: "Where a flat plate intake restrictor, restricted venturi, or Single Inlet Restrictor (SIR) is required, all intake air for each cylinder or the entire fuel-air mixture, if prepared before this point, must pass through the restrictor."
Spitler II) E&O F600 motorcycle engines
#34774 from John (Tyler · Rule change · TB 23-09 (2023-09 Fastrack)
In F600, GCR section 9.1.1.D.15, change as follows: "A. Mass produced water-cooled, 4-cylinder, 4-cycle motorcycle engines up to 600cc are allowed as per spec line (end of section). Engines may not be modified and no engine components may be added or removed unless specifically authorized by these rules." "C. All engine internals and compression ratio must remain stock. The competitor must present, on demand, an original factory manual for the engine to allow compliance verification. There shall be no modifications or removal of any component of the engine or addition of any component of the engine unless specifically authorized in these rules." "F. Carburetion or fuel injection may be used. Fuel injection, if used, and must be stock and unmodified for the model and year
Show 2 more lines
of the engine that is used, with no modifications to the intake system. The use of any carburetor jets or needles is permitted. Stock air filters and air boxes may be removed, and air filters and air boxes are unrestricted."
Allow the #420924502 Rotary Valve in the Rotax Model 494 Engine.
#33584 from Scott Thorp · Rule change · TB 23-02 (2023-02 Fastrack)
In F600, GCR section 9.1.1.D.14, change as follows: "Rotax Model 494, and Model 493, and Model 593 must use a single expansion chamber and must be equipped with electric and/or a pull starter,; an electric starter may be added. and Rotax 494 non-RAVE engine must use the 494 non-RAVE rotor valve, Ski Doo part numbers 420 924 509 or 420 924 508, 147 degree designation. Rotax 494 RAVE engine may use either the 494 non- RAVE rotor valve or the stock RAVE rotor valve, Ski Doo part number 420 924 502, 159 degree designation. RAVE valves (exhaust) may be blocked in the "full open" position or left as delivered. 494 RAVE and non-RAVE cylinder heads may not be interchanged between engines. Rotax 593 engine may be in a carbureted, non-HO or HO version; and must run inlet tract restrictors, Cometic gasket part numbers A0242SP1020A or MA0242SP1063A, one in each tract immediately after the
Show 5 more lines
carburetor; single expansion chamber; electric and/or pull starter. Alternate restrictor plate option allowed the Rotax 593 engine part number MA0242SP1063A." In F600 engine table, Rotax 494 RAVE, change the notes as follows: "Must use either the 494 non-RAVE rotor valve (Ski Doo part numbers 420 924 509 or 420 924 508, 147 degree designation) or the stock 494 RAVE rotor valve (Ski Doo part 420 924 502, 159 degree designation)."
593HO Alternate Piston
#33588 from Formula/Sports Racing Committee · Rule change · TB 23-01 (2023-01 Fastrack)
In F600, GCR section 9.1.1.D.14.H, change as follows: "Kawasaki and Rotax 494/493 engines: “OEM Type” replacement pistons of cast aluminum construction permitted. Must match OEM design, specifications, and compression ratio (such as SPI/Kimpex). No forged pistons permitted, except as specified in 9.1.1.D.14.I. Cast replacement pistons Only the following cast replacement pistons are permitted: 1. Kawasaki and Rotax 494/493 engines: "OEM Type" replacement pistons of cast aluminum construction permitted. Must match OEM design, specifications, and compression ratio (such as SPI/Kimpex). No forged pistons permitted, except as specified in 9.1.1.D.14.I.
Show 10 more lines
2. Rotax 593 HO: Sports Performance 1 Products # 54-776PS cast replacement piston is permitted." In F600, GCR section 9.1.1.D.14.I, change as follows: "Forged replacement pistons" In F600, GCR section 9.1.1.D.14.I, change as follows: "3. Rotax 593 non-HO (0.010” overbore): Rotax P/N 420889171" In F600, GCR section 9.1.1.D.14.J, change as follows: "Overbore replacement pistons" In F600, GCR section 9.1.1.D.14, change as follows: "K. Rotax 593 non-HO engine only: Rotax OEM 0.010" overbore piston P/N 420889171 is permitted. Engines may be overbored as specified by Rotax so that this piston may be fitted."