I have a 2008 Outlaw 525s, and well I have done a ton of work to it. No engine work though, other than putting it in time when I first got it (and adjusting the valves of course). I never went down far enough too look at the Piston. Here is my issue though:

I did re-gear it to 15/37, and I do have a FMF Power Core 4 Slip On with the Air Box Lid Removed!

I have raced two 400ex, one with the 440 Big Bore Kit. Nonetheless I spanked them both, really bad! I raced a 450R with a pipe and K&N, I spanked it pretty bad to. This was before I changed my gear ratio, and removed my air box lid!

I beat that same 450R on my Brothers 500 Predator, which I can beat by a school bus length. My brothers Predator has by far been the most Challenging, he has air filter removed, Pro Circuit T4 Slip On, and even put 110 Octane Racing Fuel in his Predator. I was running regular 87 gas, and could still beat him buy at least a vehicle length. Is this normal, I am probably at least in the 80’s?

I have went to 93 Octane Gas now… I also have a few people wanting to race me on there LTR450’s, but I think i’ll beat them (or at least be close). Certainly don’t think they’ll smoke me, like I have done everything I have raced!

Opinions? The Head Gasket seemingly looks like this quad may have been rebuilt in the past, could it have a high compression piston (and you reckon I need to jet mine) seen some issues with that- but mine seems to be screaming pretty loud?