hello i have 07 polaris predator 500 i have a 560cc j.e bbk , but cant find any information on what type of jetting i need and what kind of fuel do i have to run thanks .

560cc
its got a aftermarket complete exhaust (dmc)
+ 1 size intake valves

 

What's the static compression ratio of the piston?

 

opps forgot to add that part


560cc 105mm +5.8mm 12.5:1

 

what filter,do you have an open air box, or no air box,what carb, these are very important questions when jetting.12.5:1 is border line pump/race gas,what fuel are u using?are u using an open core muffler or a quit core?also what cam shaft?

 

stock cam shaft and i have a k&n filter with airbox , with stock carb (jettin was done for my pipe) and my pipe is open core muffler .

also have a upgraded cdi box if that makes any difference and i always ran premium gas before

 

on my notes for my dyno i have a couple of predators ive done,now i have an air/ fuel system for proper fuel raio's.now elevation changes final jetting,so it may vary a little,but this will help.main jet, 165 1 shim under needle and stock pilot at 2.5 turns out on mixture screw.this is for stock needle and with lid on.if its to rich u can take a uni bit and drill holes in your lid 1 at a time

 

what state do u live in?for every 1500 foot above sea level u drop 1 jet size,all my testing is done at sea level

 

i live in b.c. canada most of my riding is on wet mountians

 

try those settings and let me know

 

12.5 to 1 is race gas territory IMHO. You will be mixing at the very least.