BoP Lab / Buttonwillow Raceway Park

F5 vs F500 vs F6 vs SM pace at Buttonwillow Raceway Park

Quickest here: SM 2:00.831 William Wallis, Super Tour Feb 2025 qualifying

F5F500F6SMsolid race · dashed qualifying · slower is lower

	Event	F5			F500				F6				SM
	Event	Qual best	Race best	Trap	Qual best	Race best	Trap	vs F5	Qual best	Race best	Trap	vs F5	Qual best	Race best	Trap	vs F5
	Super Tour Feb 2026 CALCL262026-02-21												2:01.392Ryan Busk · fastest of 18 · top 5 within 0.8s+0.561s (+0.46%)	2:02.486William Rasmussen · fastest of 18 · top 5 within 1.3s+0.836s (+0.69%)	127.3Sam Rezai+23.4 mph (+22.6%)
3 rule changes (SM: 3)1 tyres & wheels · 1 wording · 1 othershowhide 2025-06-01 SM SMX Data Submission - Penalties #38248other 2025-06-01 SM SMX Penaly Clarification updated language #38337wording 2025-05-01 SM Clarify Tire Marking Regs #38005tyres & wheels
	Super Tour Feb 2025 CALCL252025-02-22												2:00.831William Wallis · fastest of 16 · top 5 within 0.9s	2:01.650Nick Leverone · fastest of 16 · top 5 within 0.3s	103.9Evan Jacobs
5 rule changes (SM: 5)1 engine · 1 suspension & brakes · 1 wording · 2 othershowhide 2024-12-01 SM E&O SMX Regs 9.1.7.1.D.5.u-.w #37070other 2024-09-01 SM SMX Camera Rule Correction #36496wording 2024-09-01 SM AIM ECU Protocol #36556engine 2024-09-01 SM OE versus OEM Definitons #36608other 2024-09-01 SM Shifter Bushing #36611suspension & brakes
	Super Tour Feb 2023 CALCL232023-02-24
25 earlier rule changes on record, in force before Super Tour Feb 2023 (from 2019)7 engine · 3 induction · 3 weight · 2 suspension & brakes · 2 tyres & wheels · 2 wording · 6 othershowhide 2023-01-01 SM BOP for NB1 and NB2 #32309weight 2022-09-01 F5 Intake Boots Correction #33028induction 2022-08-01 F5 Ensure availability of ECU for Rotax engines #32695engine 2022-07-01 F5 Clarify stepped exhaust header references #32743engine 2022-06-01 F5 593 carb boot availability and oil pump clarification #32527induction 2022-04-01 SM Update GCR Section 9.1.7.3.A.1. #32217suspension & brakes 2022-03-01 F5 E&O class name #32194other 2022-01-01 F5 Data Box Mounting Plate #31638other 2021-08-01 F5 Clarify allowable assisted shifting systems #30871wording 2021-08-01 F5 Request to correct terminology #30976tyres & wheels 2021-06-01 F5 Request to Allow Rotax 593 HO Engine #30712engine 2021-04-01 SM Updates - Obsolete Parts & BOP Parts #30438other 2020-10-01 F5 Request to Update Suzuki Engine Years for F500 #29453engine 2020-10-01 SM Radiator E&O Clarifications #29294engine 2020-08-01 SM Modifications to prevent failures of Rear Brake Caliper Pin #28953suspension & brakes 2020-07-01 F5 Request for Cockpit Adjustment of External Jetting Devices #28359other 2020-07-01 F5 Two Stroke Motors (reply to #28359 WDYT) #28816engine 2020-07-01 F5 Re letter requesting driver adjustable carb mixture #28840other 2020-07-01 F5 #28359 WDYT Request for Cockpit Adjustment #28875other 2020-01-01 F5 Change 600cc restrictor size #27883induction 2019-08-31 F5 Request for Weight Increase for Motorcycle Powered Cars #27214weight +25 lbs 2019-03-01 SM Request to allow aftermarket fuel filters. #26370wording 2019-02-01 SM Request 99-00 replacement Wire harnesses #25602engine 2019-02-01 SM Organize and Clarify 9.1.7.C.1.o. #25913weight 2019-02-01 SM Strike Tire Tread Language #26123tyres & wheels

About this data

Best is the class's fastest lap in that event's qualifying or race sessions, with the driver who set it, how many cars set a time that session and how close the top five were; a best from fewer than three cars is greyed. With two or more classes, "vs" is the gap of each class's best to the first class's at the same event. Newest event first. The coloured figure under each value is the change from the previous event that has one (green is quicker, red slower). Whole laps only, so events with different sector layouts still compare. Weather and track condition are not accounted for.