The political wheels keep on turning as the National Party looks to gain extra momentum heading in to the final week of the general election.

September 20 marks the end to months of campaigning, door knocking and shaking hands for many candidates, including National's Simon Bridges and Todd Muller.

Tauranga MP Simon Bridges and family with Bay of Plenty Candidate Todd Muller and supporters outside the National Party bus. Photo: Ross Brown.

Just over a week out the National Party's Tauranga and Bay of Plenty candidates were able to call on an extra vehicle of campaigning - the National Party bus in town for the day.

Decked fully in blue with John Key's face emblazoned on the side, the big bus is clocking up the kilometres across the country, helping drum up support for all its candidates.

Picking up Bay of Plenty and Tauranga candidates and party supporters yesterday, the bus made various stops in the area – Papamoa east, Palm Beach Plaza, and Mount Maunganui before ending up in Tauranga for the night.

Tauranga MP Simon Bridges says the bus is a great way to raise the party's profile and have 'a bit of fun” while campaigning.

But of the Bridges' clan it is oldest son Emlyn who was the most excited to be riding the big blue bus.

'It's his first bus ride. He's got two toy buses but it's good to get him in a blue one.

'We have been building it up for a couple of days saying it's John Key's bus because he knows he's my boss.”

Simon says about 80 volunteers and national supporters jumped on the bus throughout the trip.

Among the faithful supporters and volunteers is Young Nats Lower North Island chairman Christian Hermansen, on board for a large chunk of the North Island tour.

Based in Wellington the 22-year-old jumped onboard helping out at each stop with 'human hoardings” and drumming up political support.

'We have done Wellington to Napier. We have done Hastings and Waipukurau and now the Bay of Plenty.

'We are trying to help as many candidates as we can and it's just a big mobile billboard.”

The bus is today heading to the far north before travelling back down to Wellington.

Young Nats Lower North Island chairman Christian Hermansen.

Emlyn Bridges on his first bus ride.