When the modding community sees that you're genuinely interested in being a provider/facilitator instead of a selfish taker, then modders and PC gamers alike will respond more positively to your requests. The quickest way to solicit the help and support of the modding community is to become a hands on user in the community. Then don't expect other PC gamers to hold your specialized request high on their priority lists either. '.I don't have a nexus account either, and making one isn't exactly high on my priority list.' Unofficial fan sites the likes of Nexusmods (which has been around for over a decade and home to 99% PC modding community) can help/guide you in the modding process as a n00b. So there isn't any excuse on your part here. Tons of youtube videos on the DIY process as well. There are TONS of FREE tutorials on the web including the excellent one by Bethesda at the ck forum.
While the learning curve is on the steep side, the modding process is not rocket science. '.On top of that I have no idea how to make mods or how to port them.' Then save up some money and build one yourself cheap by ordering parts from cheap, high quality online PC hardware retailers like new egg software Because it's painfully clear this motorcycle mod is most likely a stolen port for XB1 console. In which case that is a flagrant red indicator you should NOT pursue any attempts to locate and download said motorcycle mod for your console.
