I need to put new pistons in my 800 XCR, what is the best choice?

You'll get 100 opinions.

I will take into consideration the experience of the replies.......what is your opinion? It had SPI's and it wasn't their fault, but I did not install them either.

Thanks

I would NEVER use SPI's in an XCR 800.


Don

What would be your 1st and (maybe only choice) and 2nd choice? Do you have three you'd like to sell and how much?

Thanks

I use Wisecos in everything, have for 40 years, although the OEM stock Polaris' would be my second choice. I don't have any in stock to sell at this time.


Don 715 462 3860

Thanks Don, that's interesting. I would never put them in a BBC that makes HP.

AS LONG AS POLARIS PISTONS ARE STILL AVAILABE, WHY WOULD YOU USE ANYTHING ELSE, $, PUT IT BACK TOGETHER THE WAY POO DID, YOU WONT HAVE TO WONDER IF ITS RIGHT.

I'm not worried about wondering if its right, just looking for opinions on parts......factory is NOT always the best. Thanks for your opinion.

I have heard that Wiseco is a quality piston although I believe they require a different clearance than the OEM?? I have also heard they are prone to cold seisure if you dont warm the motor up prior to hitting the throttle too hard?? What is your experience with this?

I dont know if it applies to thease pistons, but the wiseco pistons we put in my RM race bike were wiseco's and i was always told to let them warm up more than OEM because the pistons would expand faster than the stockers.....like i said i dont know if its the same for thease or not. When we used wiseco's they always lasted a long time and we never had any problems.

Listen, if that were true they would never sell a piston as everyone would need to send their cylinders out for re-nicasiling and clearancing to run them, it's bull.. All Forged pistons whether snowmobile , auto, outboard, or whatever, expand faster when heated, than cast pistons, so require longer warm-up times.
My experience?-- 40 years of owning a sled repair shop. I currently have them in 4 of my own sleds, 170-314 HP machines, never blew one.

Don

On a nic cylinder the Wiesco's fit perfect, no need to worry about poor machining causing failures. The Pro-Lites I installed at season start were nothing short of a work of art. Now with 1000 miles on them I have 154lbs comp on my 700. It's smooth runs great. I have never had Weisco problems and have used them on big bore tripples.

Robin make good stock pistons but on something I own then only Wiesco. SPI or Kimpex if I was trading into dealer.

Hot topic, Wiesco failures often due to poor engine build and operation IMO.