2014 Ski-Doo MX Zx 600RS Race Sled Unveiled

BRP unveiled Ski-Doo’s latest race sled this weekend – the 2014 MX Zx 600RS. According to BRP, the snowmobile will “turn quicker, stay straighter in the bumps, and have stronger starts.”

BRP says these changes come with the move from the REV-XP to the REV-XS platform and refinements to many systems for pure race track performance in both snocross and cross country.

The REV-XS platform provides what BRP calls improved ergonomics, improved aerodynamics, better rider protection and better air intake system for the engine.

“Racers will have more room in the cockpit and be able to move forward for easier cornering with the rounded side panels borrowed from the Summit line of snowmobiles – while getting better wind and snow protection from the sleek XS shape,” BRP says in a release.

The design incorporates large mesh covered vertical openings on both sides of the machine for unrestricted intake flow to the engine. As well, BRP says the sled offers easier access to servicing of everything under the hood.

Chassis changes include a longer overall length, new rear suspension geometry, new steering system and refined front suspension. A lengthened and tilted tunnel at the rear was designed to better handle tail landings on the new 128-inch length track. The rMotion Racing suspension gets reworked with longer rails to match the track, a 2.75-inch (70 mm) longer front arm with new mounting points, revised coupling system and recalibrated KYB Pro 40 shocks.

“The suspension geometry changes and longer track will provide much better traction for starts and better bump absorption in the nasty snocross style bumps,” says BRP.

Up front the MX Zx 600RS gets a new top A-Arm mount and new rack style steering system with increased leverage. BRP says the new mounting location of the A-arm provides better caster characteristics as the suspension cycles through its travel and the rack steering system eliminates any bump steer while taking less work to turn.

“Steering effort is reduced enough that racers will feel like power steering is a part of the changes,” says BRP.

Additionally the spindle length increases 5mm and the top ball-joint and spindle have increased tapered mating surfaces for a 135% strength increase.

Engine updates were also made to the cylinder and intake system. According to BRP, the cylinders will have tighter tolerances and better finishing for improved flow, while the carburetors increase to 40mm in size.

“Combined with the new intake tract, V-Force3 carbon fiber reeds, and less restrictive muffler, racers will see better performance from low in the RPM’s all the way to peak power output at 8400 rpm,” says BRP.

BRP says that making all the components work together has kept its Valcourt Race shop busy since last fall. Many parts come directly from the factory Open Mod sleds and lessons learned from racing last season have been applied and advanced from as late as last April.

2014 Ski-Doo MX Zx 600RR Updates

• New REV-XS Body Style • New, Longer Rear Suspension • New 128 inch Track • New Longer and Tilted Tunnel • New Front Suspension Geometry • New Rack Steering System with reduced steering effort • Increased Cooling Capacity • Improved Clutch Calibration • Improved ECM Calibration • 40mm Carburetors