No idea why those problems would suddenly arise after an oil change, but the problem is definately carb related. I would suggest tweaking your fuel-air mixture screw as it sounds like your bike could be running to lean.
it is either your fuel lines arnt hooked up to the carbarator right or your fuel lines a clogged and it is starving for gas
Mud bogging trucks can be viewed online on YouTube. There are videos that show true mud bogging, that is mud bogging in the woods. There are also videos of course mud bogging.
Mudd Bogging is when you Take A 4x4 out into the Mud (also known as 4 bying)
Change the fuel filter
There is no such thing as a crandberry, so the answer is no.
mud-bogging in upper new york
Check that catalytic converter is not plugged
Off road drive
You need to go through the steps of troubleshooting your bogging problems. Most likely a fuel delivery issue. Check out my bio page for help.
Mud-bogging in upper new York.
Plugged catalytic converter?
Kawasaki Brute Force in my opinion, or the CanAm Outlander