05 900 thermostat

[rodw7c]

Done the radiator block off. No problem but I discovered my thermostat had been removed by a previous owner should I leave it out or replace it? It seems to run good and cool without it.

 

[SnoDmon]

I ride one with a RK Tek head that doesn't even accept a t-stat. No problems whatsoever.

 

[knoba]

900

how cool does it run.The stat opens at about 122 .My sled runs at 122 in good snow. I think you can run too cold.

 

[Ex-Member]

120's are normal.... mine gets up to 160 on crap snow days, but scratchers will make a significant difference.

 

[mountainhorse]

Make sure that it does not have block off plug in the bypass hole if you run it.

RMX did this mod and deleted the thermostats...

IMO, Run the thermostat...

 

[diamonddave]

Make sure that it does not have block off plug in the bypass hole if you run it.

RMX did this mod and deleted the thermostats...

IMO, Run the thermostat...

IMO, Run the thermostat

Best advice, ESPECIALLY on a fuel injected motor. Remember that the cooler the engine runs, the more fuel the computer adds. Air/fuel mixture is controlled by the ECM based on inputs from onboard sensors. Too much fuel or over fueling an engine can lead to all sorts of runnabilty issues and possible engine failure.

There are many other benefits to running a thermostat on a sled.

 

[rodw7c]

Thanks

For all the input I found a thermostat and will put it back in. Guess I'll have to wait for snow to really test it out.

 

[Dogmeat]

Done the radiator block off. No problem but I discovered my thermostat had been removed by a previous owner should I leave it out or replace it? It seems to run good and cool without it.

You can run without it just fine, the only thing is that after the sled has been sitting in the cold it takes a lot longer for them to warm up to running conditions.

I used to have an RMX head on my 900 that had the bypass blocked off and no t-stat, it would take ~10 minutes of idling before it'd hit 100 degrees ...

So yes, you can run without the t-stat but you really need to wait awhile for it to hit operating temps before you get on it.

As far as running cooler once the sled is "warmed up" .... I can't tell any difference whatsoever, because for the most part your sleds' operating temp is gonna vary widley throughout the day, especially if you go from trail to powder and so forth. In a heavy powder day with the RMX head I'd see 120-130, it's pretty much the same with the SLP head I have now ...