Ok..I'll answer some... Agilities in our country uses Cheng tires.. very slippery on wet roads but long lasting... you can can change to better ones... You need to replace the tires if you see some cracks,, that means they have dried up and old, no matter how deep the treads are... As to the aftermarket cone filter, sorry I have tried those and really one rider can't avoid rain... It really sucks water and engine dies... You can just change to an aftermarket filter element... and lastly, as to the rollers and jets, sorry, mine's all stock... hope that helps...