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The Hanson Racing Engines 800 to 860 Big Bore Kit will add some serious power to your sled. This kit fits 2011-2016 Polaris 800 CFI-2 Models.
You will see great improvements in top end power and even more in the mid-range. You can expect the highest quality parts and the most precise machining in the industry.
Our 860cc Big Bore kits are designed to last. This kit features custom made Wiseco forged pistons. These new pistons are made from stronger alloy to reduce skirt collapse over time. The pistons come with new wrist pins and c-clips. We also use titanium nitride coated rings for faster break-in and longer life. The spacer plate is made from precision ground aluminum which we hard annodize. We also include a complete set of eight longer cylinder bolts and two longer dowel pins. Then you get the precision bored and ported cylinders and exhaust valves ground to match. Your head is also machined for the new cylinder bore and pistons. Your top case half will also be precision machined to match the cylinders.