Polaris RMK

The Polaris RMK was originally introduced on the 1996 Polaris Ultra 680cc triple, Indy 590, Storm, and Xlt. They featured a 15x133x1.5” track.

For the 1997 model year Polaris added twin cylinder case-reed inducted 600cc and 700cc engines. Both the 600cc and 700cc engines were built in the US and used 39mm Keihin D-slide carburetors and digital CDI ignition and utilized a 136"x15"x1.75" track with an estimated dry weight of 496lbs in the wedge chassis.,[1][2]

For 1999 the chassis of the RMK was upgraded to the Gen II style, but still retained the same 136" track as well as the 500cc, 600cc and 700cc engines.[3]

For the 2000 model year the 800cc engine was also added to lineup. The chassis also received upgrades in the form of 2" higher handle bars, sidehiller skis, as well as the Xtra-Lite suspension.[4] The 600cc, 700cc, and 800cc models used the 136"x15"x1.75" track and the 500cc model used the 136"x15"x1.5" track.[5]

For the 2001 model year the track of the 800cc model was upgraded to 144"x15"x2.0"[6] and the 700cc model had the option of the 136"x15"x1.75" or 144"x15"x2.0" tracks.[7] With the 600cc retaining the 136"x15"x1.75"[8] track and the 500cc keeping the 136"x15"x1.5" track.[9]

The 600cc, 700cc, and 800cc models were upgraded from the Gen II chassis to the Edge chassis, as well all three motors were upgraded with a Variable Exhaust System (VES) and 38mm Mikuni flatside carburetors. While the 500cc model retained the Gen II chassis.[10] 800cc models also had the option of 144"x15"x2.0" or 151"x15"x2.0" tracks.[11]

The 500cc model was dropped from the lineup. The 600cc model receives the 144"x15"x2.0" track,[12] and both the 700cc[13] and 800cc[14] models have a choice of the 144"x15"x2.0" or 151"x15"x2.0" tracks.

For 2004 all engines have PERC electronic reverse, allowing reverse of the snowmobile by reversing the engine crankshaft direction. A 159"15"x2.0" track was available on 700cc and 800cc models.[15]

For 2006 the RMK was upgraded to the Dragon chassis. The 800cc engine was dropped from the lineup and a 900cc reed-valve fuel injected twin was added, while the 700cc engine was redesigned and had fuel injection added.