"The idea was that people could hop off the train with their bike and cycle the trail, then hop back on the train," he said.
"Now we hear that the train won't stop anymore, and the timing couldn't be worse."
Mr Aslett said he was frustrated because he had written to KiwiRail about their planned changes, but had heard nothing back from them.
"I decided I couldn't sit around and wait - I had to get off my butt and do something."
Mr Aslett said anyone is welcome to sign the petition online at www.taihape.co.nz or at the following locations: Wanganui i-Site, Ohakune Station Cafe and Gallery, Taihape information centre, Project Marton, Marton Library, the Feilding Information Centre, Feilding Arts Centre, Ohingaiti Hotel, Mangaweka Pub, DC3 Cafe at Mangaweka, Green Plum Cafe at Hunterville, Sugar Plum Cafe on SH1, and the Bulls information centre.