m7 vs rmk 800

[sledneck 900]

im wondering does anyone know if the cranks on the 05 m7s last longer than on the rmk 800s cause the rmks definitely have a bad reputation with cranks. i ride the edge rmks and wanna upgrade to something better and the m7 looks like a good choice the design and chasis is betta and its lighter but i dont know if the engines last longer( all stock of course) polaris crank hater

 

[mtnclimber]

The m7s are great....very reliable machine...no cranks issues to worry about

 

[Stack]

Many M7 and F7 motors are getting 4-5000 miles without so much as a rebuild. The 05's were mapped a bit rich, but that is a pretty easy fix. These motors are very strong!

John

 

[TREE_MAGNET_777]

I ran a M7 for three years and now my son is running it and have purchaced another for my other son and these last. Only problem I have had was we lost the voltage reg. on mine but all it did was dim the lights untill replaced. Depending on your elevation, Kelseys head (rktech) is a simple and reliable head update for sleds running at elevation and seems to clean up the fuel map without a control box. if you get one with over 3000 miles IMO it is a good idea to change out the pistons. Also if you are new to Cat the M-7's have a wire you unplug for oxynated fuel up front by the ecu box, UNPLUG IT and forget about it. One more thing is I have found sled junkys clutch kit is a plug and play kit that was spot on (everything included).....Garry

 

[mtn_extreme]

4000 miles on my m7 bigbore before the turbo install. probably 500 miles on turbo and still running strong.

 

[Vern]

like mentioned they are very reliable. the m7 wont feel like it has the snap off the bottom that the edge does but IMO is a much better/funner sled to ride in every other aspect, well except maybe trail riding. and with some clutching and rkt head you can get better bottom end power out of them.