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DESIGNATION

SO, preceded by rider number.

CLASS DESCRIPTION

Sixty Inch Shootout was conceived to provide a competitive venue for

normally aspirated, non wheelie bar bikes.

This is NMRA's entry level pro class

FORMAT

Races will be a qualified 16-bike field. Qualifying and eliminations will be heads-up, run on a .400 pro tree, with all pro class rules in effect.

Each bike may be asked to complete a 10-mile road course to prove street ability at selected events. At the immediate completion of the road course, each engine will be turned off briefly and restarted. Bikes not able to restart within 3 minutes of the completion of the ride will be disqualified. Any bike that passes or gets passed by either of the pace vehicles, shuts off engine prematurely, is stopped by officials for safety reasons or pulls off the assigned course for any reason will be disqualified. Head and taillight must be on at all times. Substitute rider may participate in road coarse if rider is unable participate. All engine set-ups must be exactly the same throughout the event and are subject to being sealed. Work performed during event is limited to head gasket and up. Engines will be sealed from frame to cases to block.

BODY

Gas tanks are required on all bikes, and must resemble a production tank in

both location and style. Tanks may be lowered, lengthened, or otherwise altered,

but must generally maintain original overall appearance, size, and shape.

Tanks need not be functional. In addition to gas tanks, rear bodywork/seat

sections are required. Rear bodywork may be extended, but must maintain general

overall appearance and shape of original bodywork.

SEAT

Seat may be lowered, must remain in the same general location as a factory seat.

One-piece bodies are allowed.

FAIRING

Functional headlights and taillights are required.

Front bodywork should closely resemble factory bodywork in size and shape.

No aerodynamic devices, such as wings, fairings, or air dams, may be used,

unless originally equipped. Engine air inlets or scoops may be added.

BRAKES

Front and rear brakes are required.

CHAIN GUARDS

Chain guards are required on all entries.

ELECTRICAL

Any ignition or electrical systems allowed.

No front wheel speed sensors or third wheel speed sensors allowed.

No traction control or wheelie control systems allowed.

Tether kill switches required on all entrants. Kill switch, when activated,

must disable ignition and fuel pump(s).

ENGINE

Any engine originally used in a production motorcycle may be used.

Any modifications allowed, any transmission or clutch allowed.

FRAME

Factory OEM frames must be used, no aftermarket frames will be allowed. Any brackets, tabs, braces, mounts, gussets, seat rails, etc. may be moved, modified, replaced, or removed. Steering neck angle may altered, but must remain in original location. Rake may not exceed 40 degrees. Neck may be replaced with aftermarket neck. Subframe and/or seat rails may be modified, but seat must remain in the original forward/aft location. Seat may be lowered, but must have a minimum height from the ground of 20 inches. This measurement will be made with rider on bike and padding compressed. No modifications to main frame or engine cradle will be allowed, except as noted otherwise. On factory perimeter-style frames, (including, but not limited to, Suzuki GS, oil or water-cooled GSXR, and Kawasaki KZ), engine cradle tubes must remain intact and unmodified; i.e. no cutting, sectioning, splicing, relocating etc. allowed. "Engine cradle tubes" will be defined as the tubes which connect to the steering neck, pass down the front and under the motor, back up behind the motor, and across the top of the motor, reconnecting to the steering neck and/or front downtubes. On steel frames, main backbone tube may be replaced with a tube of larger diameter to facilitate the installation of a backbone fuel cell. On factory spar-style frames (including most modern sportbikes) main frame spars must remain intact and unmodified. "Main frame spars" are defined as the large formed tubes which connect the steering neck, engine mounts and swingarm pivot.

ENGINE SWAPS

Limited modifications to the stock frame will be allowed for the sole purpose

of interchanging engine types. These modifications will be limited to the

absolute minimum required for the swap. Modifications intended for the

purpose of improved weight distribution are strictly disallowed.

Race tech has final ruling on this issue, and pre-approval is required.

STARTING SYSTEMS

On-board starting systems required.

No external starters, batteries, or boosters allowed. No push-starts.

SWINGARMS

Swingarm-style rear suspension required, no fully welded tail-sections allowed.

Any stock, modified stock, or aftermarket swingarms will be allowed.

Swingarm pivot location may be moved, but must be within 2 inches of original

factory location. Pivot axle diameter may be enlarged. Bikes with working rear

suspension are allowed any type suspension system, as long as it utilizes a

conventional-style single front pivot. Bikes with solid rear suspension must

utilize a bolt-on swingarm, with a conventional style front pivot bolt or bolts.

Swingarm may not be welded to the frame in any manner.

Swingarm may be attached to the frame and/or subframe,

utilizing struts or braces., at a maximum of 6 points, not including the pivot bolt.

SUSPENSION

Rear suspension optional. Rigid front forks not allowed,

a minimum of 1.5 inches of front suspension travel required.

Steering damper(s) required on all entries running 9.99 or quicker in the quarter mile.

2-inch minimum ground clearance is required, measured with rider sitting on the bike.

Motorcycle type fork retention straps with boltdown eyelets are allowed. Straps must be in excellent condition.

TIRES

Motorcycle tires only, no car tires on rear.

all tires must be DOT approved.

WHEELBASE

Maximum wheelbase is 60", no over tolerance allowed.

Wheelbase will be measured with rider sitting on bike.

GENERAL SAFETY

All motorcycles and riders must pass NMRA safety inspection.

TOP GAS

DESIGNATION

TG, preceded by rider number.  Top Gas is the quickest index class.  Anything from Jr. Pro Stockers to big tire nitrous bikes to turbo charged machines competes with a heads-up, pro tree start. Top Gas is a qualified field, based on a standard of 8.20 in the quarter mile.  Standard safety requirements and a wheel base minimum of 68 inches are the only class rules. During qualifying, runs quicker than the 8.20 will be placed at the bottom of the qualifying sheet; during eliminations, runs quicker than the standard disqualify the rider under bracket “break-out” procedures.

SUPER COMP

SUPER COMP

DESIGNATION

SC, preceded by rider number.

Super Comp is designed for the mid-level sportsman racer. The Super Comp index is 8.90 seconds in the quarter mile to provide a middle ground between Super Gas and Top Gas.  Super Comp is a qualified field with a heads-up, pro tree start. Standard safety requirements are the only class rules. During qualifying, runs quicker than the 8.90 will be placed at the bottom of the qualifying sheet; during eliminations, runs quicker than the standard disqualify the rider under bracket “break-out” procedures.

SUPER GAS

SUPER GAS

DESIGNATION

SG, preceded by rider number.

Super Gas is the entry level index class that can easily be obtained with today’s high-tech street bikes off the showroom floor or even heavy modified V-twin Harley-Davidson’s. Super Gas is a qualified field, based on a standard of 9.90 in the quarter mile . Standard safety requirements are the only class rules. During qualifying, runs quicker than the 9.90 will be placed at the bottom of the qualifying sheet; during eliminations, runs quicker than the standard disqualify the rider under bracket “break-out” procedures.

SUPER

HOT ROD CRUISER

DESIGNATION

HC, preceded by rider number.

Hot Rod Cruiser is a heads-up, no break-out eliminator designated for OEM cruiser motorcycles with limited modifications that will prove to be the battle of factory performance cruisers. Hot Rod Cruiser is run “heads up” based upon qualifying on a (.400 Pro tree).

CLASS REQUIREMENTS

1. Approval of Hot Rod Cruiser Motorcycles Hot Rod Cruiser motorcycles are 4-stroke, V-Twin production cruiser machines produced and manufactured for street use.  Approval must be submitted through NMRA.  All bikes must be factory production models. Only the following brands and models are allowed in competition: Harley-Davidson (V-Rod, Sportster, or FX) Honda (VTX, Shadow), Indian (Scout), Kawasaki (Mean Streak or Vulcan), Suzuki (Intruder), Victory (V92) or Yamaha (Road Star, Warrior). Must have been originally produced as 1100cc to 1800cc model VTwin cylinder class bike. Minimum weight: SOHC or DOHC 750 pounds, or push rods 650 pounds. 

BODY

Must have originally been produced as a V-Twin cruiser. Stock fuel tank and side covers mandatory. Modifications to stock fuel tank and side covers permissible. Fenders may be replaced with cosmetic duplicates of the original parts. Duplicates must visually resemble the original parts in design and style for model year as determined by VIN number. Updating of bodywork permissible only on same models. Lower air dams permissible.  Fairings and windscreens prohibited unless OEM. Brand name must appear on both sides of motorcycle. Operational cruiser style DOT hi-beam, low-beam headlights and DOT taillights with brake lights required. The use of turn indicators and mirrors optional.

BRAKES

Hydraulic type, front and rear, mandatory. Minimum size: 7-inch diameter x .187-inch thickness for approved aftermarket rotors or .187-inch thickness OEM rotors.

CARBURETOR / FUEL INJECTION / INTAKE

OEM Fuel injection systems permitted if originally equipped.  Aftermarket fuel injection management systems permitted that plug “in-line” with bike’s ECU, must plug into stock wiring harness.  Aftermarket units must be generally available.  Electronic or mechanical enrichening devices must remain installed but may be deactivated.  Fuel lines and vent lines may be replaced. Aftermarket fuel filters may be added. Multi-aftermarket carburetors/throttle bodies permitted with a maximum of (1) one carburetor/throttle body throat per cylinder, multi-dual throat carburetors/throttle bodies not allowed. *Fuel injection may be replaced with carburetors.  Snap back throttle return mandatory.

CLUTCH

Slider clutches prohibited. No clutch management parts i.e.; air clutch, proportioning valves or hydraulics, allowed. Cable operated clutch can be converted to manually activated hydraulic clutch. Mechanical lock-ups permitted.

CONTROLS

Handlebar controls must be located in the stock position. Brake pedal, shift lever may be rear set but foot pegs must be at least 15-inches in front of rear axle vertical centerline. 

ELECTRICAL

Computers and/or data recorders prohibited. Exhaust gas temperature meters permitted. IGNITION: Aftermarket ignition box permitted. Replacements must be available for immediate shipment from U.S. warehoused to any of the manufacturer’s U.S. retail outlets for sale to the public. Availability must be maintained throughout the current racing season. The use of external belt drive magneto ignitions prohibited.

ENGINE

Must be an 1100 to 1800cc 4-stroke V-twin cylinder production engine specifically designed and manufactured for a production motorcycle with a maximum displacement of 1800cc. Class limit displacement may be achieved by cylinder overbore only - stock stroke length must be maintained. No Nitrous, turbo or superchargers permitted. Engine manufacturer will determine make of bike. Engine type or configuration, crankshaft configuration and stroke, cam drive location in the engine, number of valves, material and castings of cylinders, cylinder heads, and crankcases and any major element used in the crankshafts and camshafts may not be altered from the original model except as noted. OEM crankshafts may be lighted. Aftermarket, stock size rods are permissible, titanium rods prohibited.

CYLINDER HEADS

Stock OEM cylinder heads mandatory. Porting permissible. Valve locations and angles may not be altered. Oversize valves permitted. Aftermarket rocker arms and push rods (for push rod engines) permitted.

CYLINDER

CAMSHAFTS

TRANSMISSION

FRAME

Stock OEM frames required. Frame must display vehicle identification number (VIN) in original location. Strengthening modifications to stock frames are permitted as long as the frame is not weakened. Strengthening gussets and/or tubes may be added but none removed. Accessory brackets (radiator, shock reservoir, etc.) may be changed, relocated or removed unless they also serve as a strengthening member. Steering head angle may not be less than stock rake or more than 38 degrees maximum rake. Swing arms and struts may not be welded to frame. Struts, if used, must be “bolt on” with a maximum of (3) struts per side. Minimum seat height, with rider in position and seat compressed, measured from lowest point of seating position to ground is 18-inches. Frame strengthening gussets/tubes and replacement brackets must be made from 4130 chrome moly steel on OEM steel frames or a compatible aluminum alloy on OEM aluminum frames. All welding must be performed using an accepted ‘heliarc process’ in a “workmanship” like manner.  Frames may be polished. Wheelbase: Maximum 68”. 

FUEL

Gasoline only. All bikes must have a method to provide a fuel sample from the fuel line system. Sample must be able to be taken from line between carburetor and fuel pump or petcock. Any NMRA approved fuel (including oxygenated fuels) may be used, in an unmodified state - and must pass NMRA fuel check. The use of propylene oxide prohibited. See General Regulations 6:1,2,5 & 6. Allow enough fuel for periodic two-mile ride prior to a qualifying or elimination run.

FUEL SYSTEMS

Artificial cooling or heating systems, i.e.; cool cans, ice, freon, whippets, etc. prohibited. Circulating systems, not part of OEM fuel pump system, prohibited.

SEAT

Custom seats with a step to prevent the rider from sliding backwards are recommended. Seat, tail section, and rear fender may be incorporated in one unit.

TIRES & WHEELS

DOT motorcycle street tires only. 

Two classes make up the E.T. eliminators allowing anyone from the first time racer on his stock street bike to the all out professional bracket racer.  NON-members are not eligible for points or contingencies. Both E.T. eliminators run tournament style with a “zero” second break-out. Pro E.T. will utilize a Pro Tree, with a four-tenths (.400) delay to green. Street E.T. will utilize a full Tree, three amber countdown with a five-tenths (.500) delay to green.

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PRO ET

DESIGNATION

P/ET, preceded by rider number.

Handicapped from a “dial-in” chosen by each competitor, this is for the professional bracket racer and those seeking to sharpen their skills for sportsman racing. Standard safety requirements are the only class rules. All entries run. Rider must be a NMRA member in order compete for points and contingencies.  Mini bikes or pit bikes prohibited in competition.  Maximum dial-in allowed 12.99. *Exception for minimum dial in will be considered for wheelie bar bikes on an individual basis.

STREET ET

DESIGNATION

S/ET, preceded by rider number.

Reserved for street legal motorcycles and handicapped from a “dial-in” chosen by each competitor, this is for the beginning racer. This eliminator is run tournament style with a “zero” second break-out. Standard safety is a requirement. *The class prohibits delay boxes, 2-steps, auto-shifters, slicks,wheele bars and antifreeze.  D.O.T. street tires required.  Mini bikes or pit bikes prohibited in competition. Street ET dial-in's must range from 10.00 to 19.99