I think all the EFI Sportsmans are programmed to not be 100% full output until they're broken in. I was told something like that anyway. And both of my 500 EFIs were nowhere near as quick or fast when they were brand new as they were after 100 miles or 10 hours or so. The top speed went up and they felt quicker too.

 

<div class="FTQUOTE"><begin quote>Originally posted by: jumbofrank

I think all the EFI Sportsmans are programmed to not be 100% full output until they're broken in. I was told something like that anyway. And both of my 500 EFIs were nowhere near as quick or fast when they were brand new as they were after 100 miles or 10 hours or so. The top speed went up and they felt quicker too.</end quote></div>

That is quite possble with EFI as the ECM can be programmed to do that. The thought had crossed my mind but I dismissed it as being a little too high tech of an idea for Polaris to institute. But it makes sense because while breaking in the engine and driveline will loosen it up a little, it really shouldn't be that much. Seals loosen a little, roller bearings installed with pre-load find a seat and the piston rings seat as well ect. These things happen fairly quick. Any other "break-in " amounts to wear.
Another possibility is if the EFI ECM is set up like a modern automobile's it has adaptavie abilities, but I don't see how it could as there are no O2 sensors..

 

it wasnt designed to be any where near the renegade speed or power. that thing is alot lighter as well but i hear a few of them are breaking frames. i think given some break in time the 850 will be alot more hp then the 800 since it has more cc's and ponies it only stands to reason. imo.