POLARIS 858 CFI Big Bore

If you are looking for HUGE TORQUE and HP Gains.. then look no further.

We have developed an 858 CFI Big Bore Kit that will make stockers look like 440's.. This kit is currently still being developed. We should finalize this kit February 2012.. Stay tuned!!! Price will be VERY reasonable (About $2K) and WILL produce the power you need!

This kit is designed for the 2011 and newer PRO (2 Injector Engine). It will install on the Dragon 4 injector engine but we have done ZERO testing with the Dragon 4 Injector Engine.

The small displacement increase is only PART of the equation. Making HP is about increasing airflow and maximizing the 2 stroke's ENTIRE process.

But, just for grins... Let's add the 7.5% more displacement ALONE into the equation..
So 60cc/800cc = 7.5% more volume
So at 150HP(Stock HP) x 7.5% = 11.25 So, the cc's alone CAN/MAY add 11HP or so..

But again, it is much more complicated that that..

1) Increased Airflow, due to better flowing ports.. PROPER PORTING

2) More efficient combustion process due to our patented combustion chamber design and just a better chamber

3) More "in tune" with the pipe.. this always makes power

4) Increased RPM of the engine.. HP = Torque X RPM/5252 So RPM is ALWAYS a player.. more RPM= MORE HP as long as torque is staying constant or increasing

5)MUCH better designed piston.. Stock pistons are .008" -.009" clearance with a lousy geometry.. So, if you did nothing but FIX the piston.. you would be increasing performance.

These are just a few contributors..