Mr Boyden instigated the first Coast-to-Coast ride.
Stewart Davies, trustee for Phillips Search and Rescue, which operates the Palmerston North Rescue helicopter service, said the ride must go on.
"These 25 years have been a fantastic journey and this legacy will continue," he said.
Chris Moody first became pilot of the rescue helicopter in 2001 but left after two years, to return in 2011 as pilot and base manager.
"The Palmerston North helicopter is one of the best-equipped air ambulance, rescue helicopters in New Zealand," he said.
"The Woodville Lions raised more than $180,000 (now $196,500) for the chopper in the first 24 years and people should feel very proud of the club. We're still doing the work you enable us to do."
Mr Moody said the helicopter had clocked up 330 hours in the last 11 months and he expected it would have flown 380 hours when the 12 months was up.
Three motorcycle riders who had taken part in all 25 rides attended the evening. Unfortunately, the fourth, Trevor Ward, was unable to make it because of illness, but was represented by his wife Lesley.
Along with Trevor, Grant McRae, Lynn Southee and Lynette Hancock have been loyal supporters of the event.
Last December, McRae was on his 2002 BMW R1150R bike leaving Himatangi Beach for the ride to Akitio Beach, via Woodville, and said as long as he could sit upright on his bike, he'd continue to be there.
"Twenty-five years ago I was a member of the Dannevirke Motorcycle Club and we took a few people along for the first ride," he said.
"The motorcycle club was quite big then and for the first 10 years of the Coast-to-Coast we were a strong group. On the first ride we made up a quarter of those taking part."
In those days, the ride ended in Herbertville, but the road was challenging, McRae said.
"They then changed to Akitio Beach and even though I've moved to Palmerston North, the ride is something to do every year.
"This fundraising event is remarkable for a small [Lions] club, and it's been a magnificent fundraising effort ... fabulous."
Trevor Ward has ridden all 25 years on the same Triumph bike he put together from a box of "bits".
"When I opened it up, there were pieces from the 1950s, 60s and 70s and I built it up," he told the Dannevirke News.
''In the early days it had no plates and I'd go on the Coast-to-Coast with plates belonging to an old caravan until I saw the error of my ways and registered it.
"This is a very reliable bike, but I always take a spanner and screwdriver with me, just in case, because these English bikes have problems with oil leaks."
For the 73-year-old, the ride is about proving his old 1969 TR6P bike can make it there and back. No one else has ridden the same bike for all 25 years of the event.
"I pat it on the tank when we've made it. I absolutely enjoy this ride," he said.
Mr Boyden said Mr Ward was a legend.
"He's got something to be pretty proud of," he said.
"And Lynette (Hancock) is the only woman in the world to have ridden in 25 Coast-to-Coasts."
Mr Southee, from Feilding, has ridden across Australia six times and from Palmerston North to Whangarei and back, his longest day.
"There are always new roads to discover," he said.
And while all the supporters and sponsors were thanked, Lions club member Ron Mabey was acknowledged for the extra fundraising effort in raffling a Suzuki motorcycle, sold to the club at cost price.
"All except 20 tickets were sold, 60 per cent of them in the Plaza in Palmerston North," Mr Sinclair said.
The Woodville Lions Club is thriving, with its youngest member just 27.