Protest will take place in Westminster on Friday.
Thousands of bikers will travel from across the UK to London to show their support for a British soldier facing charges of murder over the deaths of two people in Derry in January 1972.
13 people were gunned down during a civil rights march.
The Public Prosecution Service said there was enough evidence to prosecute Soldier F for the murders of James Wray and William McKinney.
He also faces charges for the attempted murders of Patrick O'Donnell, Joseph Friel, Joe Mahon and Michael Quinn.
The former paratrooper is being referred to only as Soldier F because all military witnesses were granted anonymity through the Saville Inquiry into the circumstances around the killings.
The PPS said there was insufficient evidence to prosecute 16 other soldiers and two Official IRA men.
Chris Sleeman and Glyn Allen from the South Wales Splinter Group will lead the riders on Friday travelling from Swansea to London.
LISTEN to Glyn here for details:
The bikers will be meeting at several points in Wales.
The first stop is Celtic Motorcycles in Resolven at 6.00am and leaving at 6.20am.
McDonald's in Briton Ferry leaving at 6.30am - heading to Magor Services for 7.30am.
The bikers will then set off at 8.00am along the M4 corridor to London.