General Series Rules

The intent of this series is to create a fun, safe environment to race the Burris F-200 engine. The series is also intended to promote the Burris F-200 engine program so that it may spread and have its own classes at the tracks we are running it at.

	Weight Class - 360lbs
	Safety - All drivers must wear the following while participating in a Series event: Helmet (Snell 95 or higher), gloves, neck brace, and a driver’s suit (denim jeans and a heavy jacket are also allowed) Any driver failing to comply with these safety options will be immediately removed from the track and will be ineligible of receiving points the rest of that day.
	Age of Driver- The F-200 engine is a very fast and powerful machine. Therefore the minimum driving age of the series is 15, however if there is a special scenario where a driver have been racing for 5 years or more and has proven capable of handling the power then they may be permitted at the digression of the Series participants.
	Driver Skill- If there is any instance where a driver has displayed the incapability of driving the F-200 or is in any way consistently causing a problem on the race track, the series reserves the right to ban a driver from competition for as long as the series participants sees fit.
	Driver and Crew Conduct- A driver is responsible for the actions of themselves and their crew on and off the racetrack. Therefore any unacceptable behavior by any member of your team may be subject to driver disqualification from the current event. Depending on the severity of the behavior the driver may also be subject to a suspension for one or more races.
	Driver Racing Safety Considerations Primary reason for this series is to have fun running F-200 power plants. Some drivers are near 50 years of age and really don’t care about winning at any cost. Participants are expected to practice NASCAR style courtesy while racing. You are to yield and give room to a faster kart weather they are up even with you or not. Don’t get caught up in chopping, driving under and pushing up with the intention of forcing a fellow competitor out. If there is a problem, with this consideration, we suggest that you run in some other series.

Points and Awards

	Potential for awards will be provided for all drivers who pass tech in each competitive class. Awards may be distributed by a number of ways; drawings, top finishes, or as the donor dictates.
	To receive points you must leave the grid under power, take the green flag, weigh in and pass post tech.
	Relief driver rules. You may use a relief driver for the Feature Event if the registered driver qualified the kart or ran the heat race.
	The driver is the official entry into the event. You may change karts or engines with the approval of the Technical Director. All equipment used in qualifying and or heat race is subject to post race inspection. If any part fails post race inspection the drivers is disqualified for the event.
	Disqualification: In the event a driver is disqualified from that event for unsportsmanlike conduct on or off the racetrack, he may NOT use that as a drop race.
	If a driver is disqualified for improper driving, post‑race engine infractions, oil or fuel tech or at the scales in post tech, he may NOT use that as a drop race.
	If a driver is disqualified for mechanical failure on the track, he may use that as a drop race. However, if repeatedly disqualified for any reason the driver may be subject to penalty of not being able to use a race as a drop race.

Scoring method

The following point method will be used for calculating season points in all divisions

Finish	Points	Finish	Points	Finish	Points	Finish	Points	Finish	Points
1st	180	7th	146	13th	124	19th	106	25th	88
2nd	170	8th	142	14th	121	20th	103	26th	85
3rd	165	9th	138	15th	118	21st	100	27th	82
4th	160	10th	134	16th	115	22nd	97	28th	79
5th	155	11th	130	17th	112	23rd	94	29th	76
6th	150	12th	127	18th	109	24th	91	30th	73
			Positions 31 and lower receive 70 participation points.

o In the event of a rainout no points will be awarded

o In the event of a tie in year end points total, the tie will be broken by the most number of wins for the season, Second tie breaker is most number of second, then thirds, then fourths.

Protest Procedure

All protests must be submitted in writing to the F-200 NFRA Race Director within 30 minutes of completion of the race that is being protested or, in the case of a scoring protest, within 30 minutes after official results have been posted and declared official by the Track Race Director. A protest can only be submitted by an entrant from the same class that is being protested, and can only be signed by one entrant. Once the official has accepted a protest, additional protests for the same infraction will not be accepted. The F-200 Race Director will decide all protests before parties involved leave the track

Protests for technical disqualifications must be submitted in writing within 30 minutes of the announced infraction by the tech inspectors. These infractions are to be resolved (upheld or reversed) by the Race Director and his tech officials prior the ending of the event for the day

Tire Rules

Tires are currently in testing and are "to be determined" at this time. However, regardless of the specific tire selected, the following will apply

Tire prep chemicals, coatings, heating elements or heat scrapers of any kind are not permitted for use at the racetrack. This includes tire warmers, heat boxes, or any other element that can be used to change the temperate of the tire unnaturally

Tire Prep is not to be used on tires the day of the race. You are permitted however to put prep on your tires any time during the week prior to a race day event. Tire prep during a race event is not permitted.

Tires may be cleaned between heats by dry procedures only, no liquids of any kind!

Mirror Rule- mirrors are permitted and suggested on the go-kart. Blocking should not be the result of using the mirror. Violators will be dealt with; asked to leave, disqualified or requested to remove a mirror. Intent of mirrors is to promote NASCAR type racing safety.

Pre-Race Tire Tech tire marking, compound, signs of illegal prep

Post Race Event Tech will include:

24cc minimum combustion chamber check

.790 max carb bore check

275” max valve lift

Fuel tech

Additional Tech if requested:

Bore/stroke check

Max valve size tech

F200 Engine Specifications

Approved, commercially available, single cylinder air- cooled overhead valve engines. 200 cc's maximum displacement. See Chart for approved engines

	Block, Cylinder Head, Crankshaft and Side Cover: Must be approved OEM items. Cylinder head, block and side cover external surfaces may be machined to remove excess material from mounting bosses, cast in brackets, etc that are no longer in use. No external machining allowed to enhance performance.
	Exhaust System: The exhaust system must be of a fixed design and cannot be adjusted while the kart is in motion. (i.e. no slippy pipes) Length is non tech. Loop pipes OK. System may consist of one to three pieces (header, connector tube and tail pipe) plus a silencer (if required). These components to be stainless or low carbon steel materials only. Exhaust pipe/header may not extend past rear bumper (including silencer, where applicable) Studs allowed to attach the header to cylinder head. Sealer and gaskets non- tech. If a silencer is required the RLV Model B- 91XL* (Pt# 4104) is the only approved model.
	Carburetor: Any commercially available butterfly type Tillotson HL series carb. Maximum venturi diameter = .790” Seniors and Jr lll, .735” for Jr ll and .635” for Jr l. Maximum throttle bores are as follows; .790” carbs = 1.010”, .735” carbs = .885” and .635” carbs = .820”. Metering holes non- tech. Filter cups, adapters and air filters non- tech items. Pulse type fuel pumps permitted.

o Fuel: Gasoline General Rules - All 4 cycle engine classes designated “Gasoline only” will use commercially available roadside gasoline with a maximum of 93 octane.

§ Gas Tech - The tech inspector will draw one gallon of fuel from the source of race spec fuel. The sample will be kept in a shaded, cool location, under the control of the tech inspector. A Digitron meter must be set to 000 using the controlled sample. BNSS recommends zeroing the meter with spec fuel as opposed to using the cyclohexane method due to the potential for error due to reagent contamination and other environmental factors.

§ Competitors are allowed plus or minus 10 on the meter. Competitors are eligible for one re- check following a failed test.

o Intake manifold: Aluminum only. Maximum mean inlet tract length is 2". Length determined by adding the longest and shortest tract distances (flange to flange) together and dividing by 2.

o Connecting Rods: Aluminum only. (Fasteners and inserts/bushings excluded) Stock length (plus or minus .010") to be maintained. See chart for specific details.

o Pistons: Any aluminum three ring (compression, scraper and oil), flat top or dished piston. (No domed or pop up types) Rings and wrist pin non- tech. OEM wrist pin diameter to be maintained. See chart for maximum bore size and wrist pin diameter for a specific engine.

o Crankshaft: Standard OEM item with stock stroke length (plus or minus .010"). Thermal treating and shot peening permitted. Minor grinding for camshaft clearance permitted. No other alterations allowed. See list for specific stroke details.

o Flywheel and Ignition Coil: Aftermarket or OEM flywheels permitted. If OEM flywheel is used it must be unaltered and meet minimum listed weight and stock OEM coil (ignition system) must be used. Approved aftermarket flywheels only may be used. Spec diameter and weight as follows; 6.75” +/- .25”dia. X 4.75 lbs +/- .75 lbs. When using aftermarket flywheels, any approved OEM F200 coil may be used on any engine. (i.e. Briggs coil on a Honda, Tecumseh coil on a Kohler, etc) External coil modifications to facilitate mounting are legal. Coil mounts, flywheel key, spark plug boots and plug wires are non tech items. See below for approved flywheels.

o Cylinder Head: Original factory casting only. Two valves maximum and must maintain original location, (angles are 90º from deck with listed spacing). Carb inlet and exhaust outlet in the head have to be in their stock intended locations. Porting and grinding permitted. No external addition of metal to enhance performance allowed. Spark plug to be 14mm X .75 reach only and original stock location maintained. Minimum combustion chamber volume when mounted on engine @ TDC is 24 cc's using prescribed procedure as noted in rule 8.5. This is to be done after the event and when the engine has cooled down to a reasonable temperature. (Note - W/F head must use a 14mm plug)

o Valve Train: Steel valves, springs, retainers and push rods only. No titanium components allowed. Intake 1.080" maximum, exhaust is .990” maximum. Stock OEM rocker arms only with no alterations to their stock ratio. Rocker arms may be welded or reinforced for strength. No other alterations to original configuration permitted. Flat tappets only, must be stock appearing. Push rods, push rod guide plates, retainers, springs, keepers, rocker adjusters, etc, non- tech.

o Camshaft: Maximum (actual) lift .275" measured at valve. Cam and crank gear non- tech. This is to be done after the event and when the engine has cooled down to a reasonable temperature. Note – If the camshaft has a compression release it needs to be taken into account when zeroing the indicator on the exhaust lobe.

o Fasteners: Non- tech, but must remain in original location. Heli- coils, studs, etc allowed.

o Gaskets: Non- tech.

o Lubrication system: Must retain splash type oiling system.

Approved flywheels are the ARC models 6606 and 6608 and the UMMF model FA-100 and the FS-1001.

Engines are to be submitted by the manufacturer (or its authorized representative) for approval no later than October 1^st to be eligible for the following competition year. Approval is not automatic and is up to the discretion of the BNSS.

Approved Engines and Specifications

Make:	Briggs	Honda	Kohler	Tecumseh	Yamaha	Notes
Model:	Intek 5.5/6.5	GX200	C6 XKE	OHV 5.5	YF200 R1	Animal w/5.5 Intek crank allowed. W/F head allowed
Bore, Std:	2.688	2.679	2.638	2.797	2.598	Standard Bore
Bore, Max:	2.760	2.709	2.783	2.833	2.809	Maximum allowed
Increase:	0.072	0.030	0.145	0.036	0.211	Increase from std. bore
Stroke:	2.040	2.125	2.008	1.938	1.968	Standard Stroke +/- .010
Rod length:	3.375	3.303	3.425	3.484	3.324	Cntr to Cntr. Tolerance is +/- .010