New 167fmm oil cooling and big bore kit suppler

[pd100x]

Hi guys just bought a secondhand atv with a 167fmm engine, took it for a spin was reasonably happy with it but would love to set an oil cooler up ASAP as I'm going out with mates riding all day in 35-40 degree days but duno where to start, I would also like a bit more of a bore rather than the standard 229cc. I'd love any feed back if possible thanks guys