I may be getting older, but I refuse to grow up!
Join Date: Jun 2012
Location: PACIFIC N.W.
Being a '06 now would be a good time to at least replace the rings. It could be bad rings allowed the gas in the oil.
Check the valves for leakage by pouring or spraying brake/carb/WD40 or similar solvent in the intake and exhaust ports. If there is any leakage past the valves they should be lapped or a valve job.
Also, check the head for warpage, a common problem.
Follow the manual to set valve timing, then turn over by hand a few times and recheck the timing marks.
Did you check the timing chain for stretch?
'19 Can-Am X3, RS Turbo, 172 HP, 1300x15 STU #2 paddle, Tribute front, DynaTec controller, cat delete, GTP blow off valve, custom flame wrap, Bent Metal windshield, Blazer wiper, rear window, 48in LED light bar, 14in LED light bar, GTP LED side lights, S3 shock tower brace, aluminum rear pull plate, 5K Badlands winch, dual batteries, 5ft lighted whips, Rugged radio and intercom, interior lights, rock lights, chase lights, over $200 additional switches, YES, street legal with dirt tires.