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Have not had to have a wrench on it since I put the Spi/spx pistons in it , but will be if it makes it to the end of the season, but i am not worried it runs perfect still , no loss in rpm's or power, so like i said way better than the stock pistons, mine would scuff almost right away and then...

I am new to this forum, But not to the problem of the polaris dragon! I have an 08 800 163, I went through 8 engines including the updates that came out until 2011 never got more than around 600 miles on any of them, I finaly installed a fuel controller and put a set of spi/spx pistons in it...