He doesn't ride motorbikes any more.
"I've now got a family, so I've blown that one basically. I've got wiser and my kids are more important than me."
His ongoing discomfort hasn't stopped him giving blood every three months - and he would give more if it was allowed.
"My advice to anyone thinking about donating is just do it - you could save someone's life."
The New Zealand Blood Service said the decline in donations reflected a decrease in demand for red blood cells and how often the service was able to get to the region, rather than a reduction in willing donors.
"We try to target what we actually need," Blood Service central area manager Alastair Neill said.
"It's really good if we can send out a message saying we're short on A+ blood, if you have A+ blood and can come down on Friday, get in touch."
Nationally, the number of red blood cell donations has decreased markedly in the past five years.
In the year to September 2009, there were 152,098 donations; in the past year they dropped to 120,006.
Blood Service spokeswoman Asuka Burge said demand had dropped due to a blood conservation project initiated in 2010. However, demand for plasma-only blood, used to control bleeding in patients following trauma or transplantation, has increased.
"Our focus is to encourage blood donors to consider becoming a plasma donor to help to meet this demand," Ms Burge said.
The next Wanganui blood drive is at the Pioneer Room at 2pm on November 25.