— Improving the Polaris RZR 170 —

Polaris’ RZR 170 is a youth UTV that is made purely for fun, and Kaden Danbury’s Magnum Offroad RZR 170 is made purely for the fun of winning races. At age 10, Danbury has been racing for four years, and he already has four championships and 48 podiums to his credit. With the help of his parents and sponsors, Kaden competes in the 250 SXS Production/Modified class and the Open 200 Production class at WORCS, Dirt Series and Best in the Desert.

Here’s a look at the machine that has helped him become one of the most successful and consistent youth UTV racers.

At age 10, Kaden Danbury already has four championships and 48 podiums to his credit.


Benchmark Performance from Ramona, California, builds Danbury’s RZR engine, and a lot goes into the mild-mannered play UTV engine to turn it into a race motor. Benchmark Performance replaces the stock two-valve head with a four-valve head that they port and equip with a cam they grind to their specs. The head is adapted to the bored-and-stroked engine, and a high-compression piston raises compression from the stock 9.5:1 to 12 or 13:1 depending on the tune they want. The mods push the 170 to 200cc and power from 11 horsepower to 14. Benchmark also developed clutch mods using a Cognito Motorsports clutch kit and Gates G-Force belt to cope with the extra power and the engine’s more aggressive power delivery

With the help of his family and sponsors, Kaden Danbury has become one of the most successful and consistent youth UTV racers.
Benchmark Performance adapts a four-valve head to the RZR’s two-valve engine, and it is bored and stroked. Adjustable Walker Evans shocks replace the basic stock suspension.


Magnum Offroad builds the full custom frame, cage and body for Danbury’s RZR 170. Per the rules of the youth racing class, the chromoly steel chassis retains the stock wheelbase, single-A-arm front suspension and swingarm rear suspension, but the racing frame is far stronger than stock. Magnum Offroad’s boxed, camber-adjustable front A-arms increase front suspension travel from 5 inches to 9 inches and widen the machine 6 inches. The A-arms can be used on the stock frame.

Adjustable Walker Evans piggyback reservoir front and remote reservoir rear shocks allow precise tuning for each track. The passenger seat is deleted the seat position is lowered to improve weight distribution, and the stock driver’s seat is replaced with a PRP seat with Crow belts. To save weight, aluminum GMZ wheels replace the steel stockers, and GMZ tires give the RZR the traction it needs.

Boxed, camber-adjustable Magnum Offroad A-arms and adjustable Walker Evans piggyback reservoir shocks give the RZR’s front end more travel, strength and adjustability than stock.
The PRP racing seat, Crow belts and the deleted passenger seat are standard race UTV stuff, only smaller.


Kaden Danbury’s Magnum Offroad RZR 170

Chassis: Custom-built chassis, custom body panels—Magnum Offroad, Vista, CA;

Suspension: Magnum Offroad arms, $950—Magnum Offroad

Shocks: Walker Evans Racing, $450 per shock;

Engine: Custom-built 4-valve—Benchmark Performance, Ramona, CA

Transmission kit: Cognito Motorsports—Mad Racing, Vista, CA; (760) 806-1948

Exhaust: Big Gun Exhaust, $355; www.biggunexhaust

Belts: Gates G-Force belt, $60—Mad Racing

Tires/wheels: GMZ Sportech Tires $68–$90, GMZ Sportech Wheels, $62–$79, GMZ Race Products,

Safety belts: Crow Enterprizes, $90;

Seat: PRP Seats, $300;

Wrap/graphics: Magik Custom motocross graphics,

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