Youth Racing League

8.1 PURPOSE

8.1.1

The Youth Racing League is intended to provide an opportunity to experience Off Road Racing in a controlled and safe environment. The concept is evolving and led by an Advisory Panel within Ultra4 Racing.

8.1.2

ISA (International SidexSide Association - USAC UTV Council) will appoint a Leader to sanction and manage this segment of racing

8.2 ELIGIBILITY

8.2.1

Racers

1. Drivers’ age as of January 1st of the calendar year
2. Ages 6-12 in the Youth Racing League (170-250CC)
3. Ages 12-17 in the Youth 1000 UTV (See section 7.8)

8.3 GENERAL SAFETY REQUIREMENTS

8.3.1

Vehicles must have a chassis tech to ISA standards

8.3.2

Seat position open

8.3.3

Safety nets and 5-point harnesses are required

8.3.4

Driver window net or wrist restraints are required

8.3.5

Aftermarket roll cages are mandatory 1.25” x .083” wall min main tubes.

1. Top of roll cage above driver’s head must have either an “X” or a front to back center bar with a single diagonal above the drivers head.

8.3.6

Weight requirements

1. All weights are with Driver and safety equipment included. (Weight may be adjusted at the discretion of Ultra4 or USAC Officials)
2. Weight classes
   1. Polaris 170 – 600lbs.
   2. Polaris 200 – 650lbs.
   3. HiSun 250 – 700lbs.

8.3.7

Normally aspirated only

8.3.8

Engine 250CC max block design

8.3.9

The rulebook and culture for youth racing are evolving. The spirit of the class as outlined will be the guiding principal. OEM/Stock mean unmodified in any way.

8.4 MODIFIED CLASS SPECIFICATION

8.4.1

Chassis – Open

8.4.2

Engine -Polaris Based 57mm Head Bolt Spacing

8.4.3

Engine Management – Open

8.4.4

Exhaust – Open

8.4.5

Body – Open

1. Weight Reduction – Open

8.4.6

Drivetrain – Open

8.4.7

Suspension - Open

8.4.8

Brakes – Open

8.4.9

Wheels and Tires – Open

8.5 LIMITED CLASS SPECIFICATIONS

8.5.1

Chassis

1. Pan (OEM Chassis) and Upper Shock Points from Homologated (Production) Tagged Chassis (RzR 170, 200, and HiSun 250)

8.5.2

Engine

1. All vehicles must use stock engine cases, cylinder, cylinder head and Piston.
2. Engine must remain in Stock Location
3. Intake: Must remain stock and complete, no modifications allowed (Including Porting and Polishing). Stock air intake system required, including airbox with stock type air filter. Aftermarket stock type air filter element allowed.
4. OEM fuel delivery system (fuel pump, fuel tank, fuel injector)
5. OEM Tank may be replaced with an SFI/FIA Approved Cell
6. Approved 180 CC Kit Conversion
   • Cylinder Head: GY6-02057-30.5/26.5-1 OR GY6-02057-30.5/26.5-2
   • Piston: GY6-PIS63
   • Cylinder: GY6-0105763
   • Gaskets: (Head and Base ) GY6-GAS63-57
   • Roker Arm Assembly: GY6-ROC-57-2V
   • Cam: GY6-T300
   • Complete Kit: GY6-USAC-63

8.5.3

Engine Management

1. No aftermarket ECU’s except for Aracer Super X
2. Piggyback fuel tuners are allowed
3. ECU tuning is allowed

8.5.4

Exhaust

1. Aftermarket exhaust allowed

8.5.5

Body

1. Rear firewall mandatory
2. Weight reduction allowed
3. Factory bedsides must be retained

8.5.6

Drivetrain

1. Clutching: clutching changes or components are allowed
2. Final drive gearing may be changed

8.5.7

Suspension

1. Upgrades are allowed, up to and including upgrading prior 2021 170 models to a dual a-arm front suspension.
2. Aftermarket shocks that bolt directly to the OEM mounting locations are allowed

8.5.8

Brakes - Open

8.5.9

Wheels and Tires - Open

8.6 STOCK CLASS SPECIFICATIONS

8.6.1

Chassis

1. Full Chassis from Homologated Tagged Chassis (RzR 170, 200, and HiSun 250)

8.6.2

Engine

1. All vehicles must use stock engine cases, cylinder, cylinder head and Piston.
2. Engine must remain in Stock Location
3. Intake: Must remain stock and complete, no modifications allowed. (Including porting and polishing). Stock air intake system required, including airbox with stock type air filter. Aftermarket stock type filter element allowed.
4. OEM fuel delivery system required (fuel pump, fuel tank, fuel injector)

8.6.3

Engine Management

1. Stock ECU required.
2. No piggyback fuel tuners allowed
3. No Flashing of ECUs

8.6.4

Exhaust

1. Aftermarket Exhaust systems are NOT allowed.

8.6.5

Body

1. Manufacturer plastics must not be removed, except for the rear bed cover.
2. Any other Weight removal is NOT allowed

8.6.6

Drivetrain

1. Clutching: clutching changes or components are allowed
2. Final Drive gearing, specifically the front or rear sprocket, may be changed.

8.6.7

Suspension

1. All A-arm mounting points must remain in the OEM stock location and position as delivered from the manufacturer.
2. Suspension modification is allowed to OEM shocks, including internal parts, and/or complete aftermarket shocks that directly bolt to the OEM mounting locations.
3. No other suspension changes allowed, including A -arms, axles, and swing arm must remain stock.
4. No long travel kits.
5. Stock swingarm may be reinforced with gussets.
6. “Wheel hubs” must remain stock.
7. Upgrading prior 2021 170 models to dual a-arm front suspension allowed
8. Aftermarket shocks that bolt directly to the OEM mounting locations are allowed

8.6.8

Brakes - Open

8.6.9

Wheels and Tires – Open

8.7 COMPETITION RULES

8.7.1

Co-Drivers

1. Youth Racing League – Co Drivers are not permitted
2. Youth 1000 UTV – Co Driver must be responsible adult (Preferable Parent)

8.7.2

Youth 1000 UTV driver cannot race in any other 49000 class in the same year

1. Exception if class is not available at event

8.7.3

Youth Racing League drivers may step up and race Youth 1000 UTV if they can in a safe manner with Ultra4 and USAC approval