Outlaw 600 is a stock based engine
class with a spec concept chassis.
Outlaw 600 General requirements
1. All Outlaw 600 sleds must
have a single 121X15 rubber track and 3 ski’s. The
sled must have a full roll cage located to the left of the
tunnel and a 600 cc engine reverse mounted with clutches to the
right hand side of the machine. The engine must be located in
front of the tunnel/track.
2. The brand of engine, hood,
and logo’s need not match.
3. All snowmobiles must
comply with general rules section unless otherwise noted.
4. Outlaw 600 sleds must weigh
875 pounds minimum with the driver in place after a race event.
Ballast may be added to the sled to meet weight rules. The
ballast must be securely mounted with two fasteners of 5/16
inch diameter minimum. The ballast must be securely fastened to
the chassis. All ballast must be painted black and carry the
5. Maximum width of the
chassis is 54 inches measured at the outside of the skis.
Minimum width at the same measurement point is 51 inches.
6. Maximum length is 82
inches, minimum length 78 inches, determined by measurement from
ski mounting bolt centerline, to centerline of rear idler axle
7. No titanium, magnesium, or
carbon fibre is allowed anywhere in the construction of the
8. No remote adjusters are
allowed on front or rear shocks.
9. The sled seat must be
constructed of a minimum 1/8 inch thick aluminum commercially
available seat with head rest.
10. A five point safety harness
must be installed per requirements in General Rules Enclosed
11. Hahns devices, or other
commercially available neck and head restraint devices are
12. The sled must have an on
board Halon type fire suppressant system per enclosed cockpit
rules in General Rules Section.
13. The driver must use approved
Sprint car style arm restraints. See General Rules Section under
14. Window nets may also be used, but
are not intended to replace an arm restraint
15. Driver is required to wear an
approved automotive style firesuit while driving the unit. The
firesuit must be the final layer of clothing the driver is
wearing and no other clothing can be worn over the firesuit.
ORIGINAL ENGINE CONCEPT
All engines must use the brand
specific OUTLAW pipe/carb restrictor kit with no alterations
except tailpipe. Hooper Racing Engines is the only approved
vendor of the kits.
2. Allowable engines are: Arctic
Cat 600 Twin 2004-2008, Polaris XC 600 Twin, 2000-2005 (64mm
stroke)Ski Doo 600 HO 2003-2007 and Yamaha 94-99 600 Twin.
Carburetor restrictions are as follows :
Cat and Ski Doo must use OEM 40 mm carbs with the following
dimension restrictors, 37mm id X12mm long pressed into the
engine side of the carburetor.
3. Sleds built to this engine rule
will be legal for competition for the 2013-2014 season.
CURRENT MODEL ENGINE CONCEPT
4. For evaluation purposes,
in addition to the above concept engines, any legal
production 600 two stroke engine or four stroke equivalent
engine will be allowed. (per manufacturers rules formula, for
four stroke equivalents) These new engines will be under a test
and possible restriction program that will take place
during the 2013-2014 season. Engine restrictions may be varied
by model and brand and will be made available to drivers per on
line bulletins, effective weekly during the season.
5. Sleds built to this engine
concept will be legal for the 2013 -2014 season
6. No overbore is allowed.
7. Oil injection pump mechanism
and thermostats may be removed.
8. No modifications to the
crankshaft or crankcase except for as follows: Four (4) 1/8
diameter holes may be drilled into the crankcase to aid in
lubrication of crank bearings. An additional vacuum port
may be drilled into the crankcase to utilize and additional
pump for slide lube delivery.
9. Allowable cylinder
modifications are as follows.
a. Exhaust ports may be modified but original flange angle and
length must be maintained
b. Exhaust valves may be modified, removed or replaced.
c. Crankcase mounting deck height may be raised with gaskets or
other cylinder modifications allowed.
10. Pistons must be OEM stock or
exact oem replacement pistons. Lightweight pistons are not
allowed. Piston weight will be verified against stock piston
11. No modification to OEM
or OEM replacement pistons is allowed.
12.. Cylinder head may be modified but
original stock spark plug location must be retained.
13. Carbs must be OEM as produced from
the engine manufacturer with no modifications to the carb bore.
Class restrictions to each individual engine and carb
combination will be dictated by the equalization rules set in
place. (Refer to chart for proper carb restriction) Slides may
be cut but no additional material may be added. Jets, needles
and other tuning components may be replaced.
14. No airbox allowed. Any
filter, screen, or plenum may be used, but no method of
pressurizing air inlet to the carbs will be allowed. This is at
the discretion of the technical inspector.
15. Original water pump must be used
16. Any engine mount, or engine
mount torque limiter or retainer may be used.
17. The only exhaust allowed for any
brand engine will be approved vended Outlaw 600 Twin spec pipes
with engine brand specific exhaust mount flanges. No
modification of any kind to the pipes or flanges will be
allowed. The inside diameter of tailpipes and silencers is not
restricted. Pipes may be painted or coated to a maximum of .005
inch thick. No heat wrap, heat tape or other method of
insulation is allowed. No holes in the pipes or flanges for
temperature probes are allowed.
18. Hooper Racing will be the
only approved vendor for the spec pipe. A method of
identification and sequence will be in operation. Spec pipe may
include spacers/restrictors/ fitment components, which must be
used in their entirety.
19. No heat exchangers allowed.
Radiators must be used for cooling, and must be mounted in front
of the snowmobile chassis and all suspension components. No
bumper or protective device is allowed in front of the radiator.
20. No electric fuel pumps are
allowed to supply fuel to the engine. Fuel pump must be
conventional vacuum operated snowmobile type.
Any commercially available drive and driven clutches and
internal components may be used. Clutches and components
may be modified.
2. Both drive and driven clutch
must located on right side of tunnel.
3. No machining, grinding,
cutting or welding allowed on clutches unless otherwise
4. Clutch guard must fully
enclose both clutches and may be vented from the backside
or bottom only.
5. Minimum thickness of
shall be .095 steel or 3/16 aluminum. No additional
guard or nerf bar is allowed
around or near the clutches. Clutch guard must be
mounted to chassis with four (4) 5/16 bolts. The bolts
must be located in chassis structure that will support the
clutch guard in case of accident or explosion. These fasteners
will not be allowed to be attached to the tunnel material only.
Additional material to reinforce the pinch point of the bolt
must be used.
6. Any fully enclosed
chaincase/gearbox allowed. The case must be mounted on the left
side of the tunnel and be driven by a solid steel jackshaft from
the driven clutch.
7. Center distance from
jackshaft to track shaft shall be 6.250 inches minimum and 7.500
8. No belt drive chain
9. Final drive must be
accomplished with a set of gears with a internal 6 spline drive,
one inch wide, solid steel midget car racing quick change gears.
10. The track drive shaft must
be solid steel and use any OEM plastic 9 tooth drive sprocket.
No aftermarket track drive sprockets allowed.
11. The clutch may be cooled
with an auxillary electric fan and appropriate ducting. Fan
discharge cannot enter the engine area.
Brakes and Throttle controls
1. Brake rotor must be steel
material, 7.5 inch minimum diameter and minimum 3/16 inch thick.
The rotor must be mounted on the right side of the track drive
shaft inside the tunnel.
2. Any commercially available
hydraulic brake caliper allowed.
3. Any commercially available
master cylinder allowed. The master must be of a design
intended for foot operation. No stock or modified hand actuated
master cylinders allowed.
4. Brakes must be foot operated.
5. An auxiliary electric fan may
be used to cool the brake disc, caliper, and caliper housing.
Ducting must discharge under/inside the tunnel.
5. The throttle must be foot
operated and have a solid stop under the pedal. A second or
redundant spring must be added to aid in throttle return.
ski suspension and steering
1. All sleds in this class must use a
four (4) bar trailing arm design front suspension with minimum
24 inch long trailing arms measured from rear mount bolt center
to center of spindle weldment. The maximum caster angle allowed
on the trailing arm shall be 30 degrees.
2. Maximum width shall be 54
inches measured outside of skis in a straight ahead position.
3. Minimum width shall be 51
inches measured at the outside of skis in a straight ahead
Any Ski suspension shock allowed.
5. Only two skis are allowed on
the front of the sled.
6. The optional third ski must
be mounted behind the roll cage. The optional left rear ski
suspension must be a single trailing A-frame design with a
aluminum or steel body coil over shock. The maximum distance
between the track and the left rear ski is 20 inches. The rear
of the trailing ski cannot extend past the center line of the
rear idler wheel in the track suspension. No cutting edge
or wear bar is allowed on this trailing ski.
8. The trailing ski must be
fixed in lateral location and cannot be steered in any manner.
9. All skis must be Wahl
wide or narrow configuration Champ ski 's with no modifications
to bottom surface. Front skis must be a minimum of 14 inches
long excluding the ski loop. Rear (trailing)
ski must be a minimum of 12 inches long and loop may be removed.
10. Only one six inch
carbide per front steering ski allowed. No other cutting
11. Any sway bar may be
12. Steering must be
controlled through the use of rods, heim joints, and bell
cranks. Rack systems, gearbox systems allowed.
13. The steering shaft must have
either a collapsible U-bend, splined sliding sleeve allowing for
a minimum of 4 inches of movement, or sleeve with a
lightweight shear mechanism that allows for 4 inches of travel
in event of collision.
14. Steering wheel must be
used but may only rotate 175 degrees maximum from steering stop
to steering stop.
15. Full circle, partial
circle or butterfly wheels allowed.
16. Steering wheels are
allowed to be mounted to a quick release hub, for removal for
ease of entry or egress to the cockpit. Quick release hub must
be a commercially available product, no homemade or one off
17. Right ski must be
offset from track 11 to 13 inches. This is measured from right
edge of track to right edge of ski in straight ahead position.
18. The front bulkhead to which
the front suspension components are attached must be a
minimum of 9 inches high above the floor pan (from floor pan to
upper member) and must have a minimum width dimension of 30
inches to allow for safe location of the drivers feet, foot box
construction, and ability to operate controls.
1. Track and suspension
must be contained inside the tunnel. No outboard shocks or
2. Only one shock may be
used in rear suspension. Any brand or material shock may
3. Devices which link front and
rear skid frame movement are not allowed. (No coupled
suspension) The rear of the skid frame must travel and react
independently of the front torque arm of the rear suspension.
4. A maximum 8 inch rear idler
wheel is allowed
5. Slide Lube systems allowed.
Tank (reservoir) must be securely mounted.l.
track & traction
Only a Camoplast #9997R track will be allowed.
2. The track must be used
as produced by the molder of the track. No cutting or
other modifications allowed.
3. One hole (to be
specified) may be cut in the track to aid in adjustment of front
4. No weld on hooker
5. Traction studs shall be
a push through, carbide tip, minimum angle of the tip will be 45
degrees. The stud must be .175 inch diameter or greater at
the point of juncture to the carbide tip. Any single
backer plate may be used in mounting the stud. No modification
is allowed to the backer plate or the track when mounting the
studs. Maximum number of studs allowed will be 384.
A maximum of two (2) studs per row are
allowed on the outside belts of the track. Maximum penetration
of the stud shall be 3/8 inch above the highest point of the
frame & body
1. Left bottom frame rail
must be a minimum 1 ¼ x .083 steel square tube, and must extend
from front of drivers foot box to behind rear main roll cage
2. Rear roll cage arch
must be welded to top of frame rails and must be located and
securely attached to the left side of the tunnel 17 to 20 inches
ahead of the center of the rear idler wheel.
3. Upper half of rear roll cage
arch must be supported by at least one diagonal brace on each
side. This must be located beside the driver’s shoulders. One
additional brace is required behind the seat.
4. Roll cage must be made of
minimum 1 ¼ x.083 DOM or EW steel tubing.
5. All roll cages must
have 2 arch shaped structures extending at least 4 inches above
the driver connected by 2 horizontal 1 ¼ x.083 tubes forming an
opening large enough and in a shape conducive to the driver
using as an exit if needed.
7. Minimum inside width of
roll cage is 20”. Minimum length inside roll cage is 24”
measured 18inches up from floor pan.
8. Side bars of roll cage
must bow outward minimum 5 inches each side and top side bars
must be minimum 17 inches vertical from the floor of the cage.
9. Left side of roll cage
must have either 3 bowed sidebars with connectors welded between
all three and the main frame rail, or 2 horizontal side bars and
3 vertical bars connecting from second side bar to frame rail.
All horizontal and vertical bars on left hand side of roll cage
must be plated in the driver’s area. Steel minimum .074 in
thickness must be used. Plating shall extend from front vertical
corner post of cage to rear vertical post of cage. Plating may
be on top of cross bars in roll cage, or may be fitted between
cross bars of cage. In either method the plating must be
securely welded as to become a structural component of the cage.
An additional 8 inches of plating must be located on the rear of
the cage from the left rear vertical corner post inward behind
the driver, to prevent intrusion into cage area from the rear.
10. All roll cage tubes that may
come into contact with driver’s helmet, elbows, knees or lower
leg must be covered with approved high density roll cage
protection foam material.
12. Tunnel must be a minimum
.080 material. Maximum width is 18 inches wide outside dimension
and must fully enclose track to within 5 inches of the ground
with rider in sled.
13. Sled must have a minimum 22
gauge steel or 1/8 inch aluminum panel between driver and
14. No front bumpers will be
allowed. Rear and side bumpers allowable, All bumper ends must
be capped or plugged.
15. Minimum ground clearance
(ride height) is 3 inches and the sled must have 2.5 inches of
usable vertical suspension travel front and rear.
16. No body panels may extend
more than 28 inches above the ground or 1 inch in front of the
17. On the right hand side of the roll
cage no body panels may extend rearward past the junction of the
tailpipe to the expansion chamber.
17. No body panels may cover
skis or trailing arms
18. No body panels may cover
clutches or right side of tunnel. Entire right side of tunnel
must be exposed except for the clutch guard.
19. The nose (front body structure) of
the sled must be a minimum of 20 inches wide and a maximum of 32
inches wide and the front leading surface must be within 25
degrees of vertical. No pointed or wedge shaped cones allowed.
20. Floor pan under driver must be
minimum .060 aluminum or 22 gauge steel. Floor pan must not
extend rearward under the fuel cell. Fuel cell to be so
positioned and mounted that any lost fuel is directly deposited
on the ground and cannot migrate into driver’s compartment.
21. A 3 gallon maximum fuel cell
with steel protective box must be used. The cell container must
be securely fastened behind the roll cage within two inches of
the tunnel. The container must be strapped down with two metal
bumper/crash bar shall be installed to protect the fuel cell and
must remain in the periphery of the chassis. Minimum ¾ inch DOM
or EW .065 wall steel tube is required for this function.
22. All fuel line from fuel cell
to fuel pump must be braided steel protected. Fuel line
may not run through driver’s compartment.
23. The cell must have a minimum
22 gauge steel panel over the top of the cell and a minimum 22
gauge steel panel across the entire width of the roll cage
extending up a minimum of 17 inches from the floor pan.
24. A 2.5 pound minimum dry chemical
hand operated fire extinguisher must be mounted in the
cockpit area, accessible by driver or safety crew.
25. No mirrors are allowed anywhere on
26. A windshield/windscreen, if
used must only be placed in front of the driver. Windshield must
be of a design that protects driver from elements and debris
only. No aero effect windshields allowed.
27. Six (6) inch minimum numbers
must be displayed on each side of the sled and a four (4) inch
minimum number must be displayed on the rear tunnel enclosure.
ignition & electrical
1. Any production
snowmobile ignition allowed. Ignition must be used as a complete
package. No intermingling of components allowed.
2. No lightening of flywheel is
3. No modification or removal of
ignition components in a particular set up is allowed.
4. A spec LED taillight
(Yamaha #8GC-84710-02) must be used. No exceptions. Light must
be illuminated at all times while on the racing surface, whether
the engine is running or not.
5. No electric fuel pumps
allowed for fuel delivery.
6. Data acquisition systems
7. Spark plugs, spark plug wires and connector do
not have to be OEM.
8. No radio communication between driver and
crew or “spotter” allowed.
9. The tether switch must be mounted
to the right of the driver and high enough in the
chassis so that it is in full view at all times
10. All sleds in the class must
use a sealed 12 volt battery capable of running the taillight
continuously for 15 minutes minimum.