12' RMK Pro 800 "normal" temp range

[kpudden]

Just picked up a new to me sled, @ 900 hours, seemingly well maintained, appearance is mint. On packed powder/groomed runs temps trended quickly up towards the 200 mark, I had to hit ditches (and get stuck on occasion) to keep the temp in the 150-170 range. Does this sound typical, if so, I may need to get scrapers or find other ways to keep my sled from getting to hot...maybe I just got the wrong type for my usage, which is a mixture of terrain from groomed runs to very deep drifts up steep terrain.

Any insights or suggestions?

Thanks!

 

[Murph]

Just picked up a new to me sled, @ 900 hours, seemingly well maintained, appearance is mint. On packed powder/groomed runs temps trended quickly up towards the 200 mark, I had to hit ditches (and get stuck on occasion) to keep the temp in the 150-170 range. Does this sound typical, if so, I may need to get scrapers or find other ways to keep my sled from getting to hot...maybe I just got the wrong type for my usage, which is a mixture of terrain from groomed runs to very deep drifts up steep terrain.

Any insights or suggestions?

Thanks!

Definitely need to run scratchers on a Pro on groomed trails. Stock Pro thermostat opens at 120 degrees-- running down trail should be 127-136. 200 degrees is way too hot and sled will go into limp mode.

With the BRP bypass thermostat ( there are threads on here about BRP install) the thermostat opens at 99 degrees and temps typically run cooler because you remove the stock restrictive thermostat from the head. Our sleds with the BRP thermostat run 109-122 down the trail. I'm overly conservative, but won't let our sleds get up past 150 degrees.

 

[kpudden]

Any particular type/brand/vendor for scratchers recommended? I'll look in to Tstat as well.

Thanks.

 

[Murph]

I just use the stockers and when those break I replace with the replacement springs from WPS-- they are cheap, I think around $16.

I tried the cable style but found they didn't have enough downward pressure for our snow.

 

[tuneman]

I use the stock style scratches too. Much more effective than cables. The BRP bypass thermostat mod won't help you at all on groomed trails. It'll still get hot without scratchers. The BRP mod helps the engine cool better when rippin' wide open thru 3 feet of pow.

 

[MKULTRA]

My little experience with the pro on the trails is don't go anywhere on packed surface without at least one working scratcher

Also tapping it once in a while even on packed surface to send some snow in the tunnel helps versus have a steady thumb on the throttle

I've broke the stocker pretty fast but they were very effective, no overheating at all on any kind of surface, a real piece of mind, you just have to get them down and up at the right time which sometimes can be a PITA.
I've replaced the stocker with the cable type i got from ebay and they were performing poorly, sometimes one side would bang against the rail and the side of the track at high speed. Also they would occasionally hook themselves up while riding.

I'm going back the spring type this year