saggy balls

just got my first banshee its a 97 and will be using it for trail riding in PA so im more worried about bottom end. it has stock ported cylinders, what kind of port i have no idea with a stock head pistons say 2470a 513m06550 not sure what those are and have no way to measure at the moment stock carbs with v force reeds coming from open uni filters fmf fatty head pipes with tubine core silencers just need advise on this set up as is or things to add thanks

So I just bought my first banshee its a 97 i will be riding it in pennsylvania on tighter trails so looking for more of a bottom end setup. just wondering if this is a good setup and things to add. stock cylinders ported but no idea what type of port crank not sure about but has wsm 45-520 rods, are those oem replacement? will i need to split the case to find out? stock head stock carbs with vforce reeds coming from 2 open uni filters fmf fatty head pipes with fmf isde turbine core spark arresters everything else apears orignal on wheeler

heres a pic of the intake and thanks for the help on the cylinder id

Just got my first banshee and it appears the cylinder and rods are after market its got a blown top end so just want to see what im working with before i rebuild it. thanks for the help. cylinders have no markings and are clearly port and polished connecting rods say wsm on one side and 45-520 on other