I have a 03 predator and i bought it knowing it didnt run. I found out it had no compression so I tore it apart and found that the piston seamed a little loose in cylender but other than that head looked fine and cylender was not scored. I even turned head upside down and filled it with gasoline and it took quite a while just fo a litfle to leak out. I know this engine has the camshaft with the compresion release but i dont k ow how to check if something is wrong with it. What would you do at this point.

 

Get this manual before you go any further.It will show what you need to do on valves, piston,etc.2003 Polaris Predator 500 Service Manual PDF Download

 

I have the manual and haveven looked through it a lot. I just don't know if maybe the piston rings are worn out to much, the valves are leaking, the compression release cam is releasing all of the compression or a combination of those. I just was wondering what I should do next so I do think waste any money

 

Read the manual on the piston to cylinder clearances,ring end gap,etc.. Along with the trouble shooting guides.

 

Ok will do