McLean holds his lead over the start of the lap but Cooper is right there.

This will be another battle of the slipstreams down to Coleraine.

Adam McLean makes the move into Juniper Hill to lead Cooper over the line by 0.6 seconds.

Paul Jordan is a lonely third, ahead of Micko Sweeny, Barry Furber and AJ Venter.

McLean keeps his foot in right up against the kerb on the run to Metropole.

That's brave stuff, but Cooper still leads as they hit Portrush.

Steve Parrish
BBC Sport NI commentator

There is nothing between Adam McLean and Richard Cooper. One of them is getting the slipstream and then the other one is.

McLean hits back into Mather's Cross but Cooper against responds. These two went at it in the opening race this morning and have picked up where they left off.

McLean and Cooper trade places in the slipstream on the run to Coleraine, but it's Cooper who holds it on the brakes.

It's Cooper and McLean who have broken away from the chasing pack, which is currently led by Paul Jordan.

Steve Parrish
BBC Sport NI commentator

They are perfect conditions and the wind is still settling down.

Richard Cooper leads off the line ahead of Adam McLean!

A look to the lights, the engine notes rise....AND WE ARE RACING!

Ryan Farquhar speaking on BBC iPlayer:

"Richard [Cooper] has been unreal. The way he was riding on Thursday as well.

"I know Michael Dunlop beat him in the 600 race, but I think he has shown today how good a rider he is and we have done all we can, we need a bit of luck now.

"It would be unreal [to do the double]."

Image source, Pacemaker

Here's the grid for the Supertwins race. Peter Hickman won't be racing in that one as he's limited to five race starts in a day, and he'll be gunning for the feature Superbike race.

1. Richard Cooper (Kawasaki)
2. Adam McLean (Yamaha)
3. Paul Jordan (Aprillia)
4. Peter Hickman (Yamaha) - DNS
5. Jeremy McWilliams (Aprillia)
6. Michael Sweeney (Aprillia)
7. Jamie Corward (Kawasaki) - DNS
8. Michael Rutter (Yamaha)
9. Pierre Yves Bian (Aprillia)
10. AJ Venter (Kawasaki)

More from Stephen Watson on BBC iPlayer:

"No Jamie Coward in this race. He was involved in an incident earlier on and was taken to hospital for treatment."

BBC Sport NI's Stephen Watson speaking on BBC iPlayer:

"An update on Jeremy McWilliams, who crashed earlier on at Millroad roundabout.

"He is back out for this race. I spoke to his wife Jill briefly and asked how he was and he is a bit sore, bumped and bruised but happy to take place in this race which is good to see."

The Supertwins are off on their warm-up lap before their second four-lap outing of the afternoon.

Keith Huewen
BBC Sport NI commentator

Jeremy McWilliams, to be a 61-year-old and to be competitive at a level is fantastic.

He has been fantastic at Grand Prix no matter what he has been riding, he has always been competitive.

So we've two races to go this afternoon.

The Superwtins get their second outing of the day before the feature North West 200 Superbike race to round out the action.

They should be two crackers.

Here's a look at your top 10.

Image source, BBC Sport