Updated

Johannesburg, South Africa (SportsNetwork.com) - Wallie Coetsee carded a 6- under 65 in Friday's second round and he moved one stroke clear of the field at the Joburg Open.

Coetsee, who has missed the cut in his last two European Tour starts, finished 36 holes at 12-under-par 131. He played the West Course at Royal Johannesburg & Kensington Golf Club in round two.

The first two rounds were played on the par-71 East Course and the par-72 West Course at Royal Johannesburg & Kensington Golf Club. The East Course will host the final two rounds.

The next five players behind Coetsee on the leaderboard all played the East Course in the second round.

Simon Dyson (67), Garth Mulroy (68) and Tjaart van der Walt (69) share second place at minus-11. Van der Walt had moved to 12-under, but he bogeyed the 17th to slip back into second place.

Niclas Fasth (67) and Anthony Wall (66) are tied for fifth at 10-under 133.

First-round leader Nic Henning mixed two birdies, a double-bogey and six bogeys in a round of 6-over 78. He ended two rounds at 3-under-par 140 and missed the cut by one stroke.

Coetsee flew out of the gate with three straight birdies from the first. After a pair of pars, he birdied the par-4 sixth, but gave that shot right back as he bogeyed the seventh.

The 44-year-old ran off five consecutive pars from the eighth. He jumped into a share of the lead with an eagle on the par-5 15th.

Coetsee moved atop the leaderboard at minus-12 with a birdie on the 17th. He parred the last to end there.

"There were no cameras on me the whole day, so it was quite easy out there. I made one stupid bogey out there on the seventh, but I enjoyed the round a lot," said Coetsee. "This is a marathon, not a race. You have to pull the horse back a bit, you can't run too fast. We'll let the horse loose on Sunday on the back nine. For now, it's about making solid pars."

Dyson birdied the first and followed with four pars in a row. He poured in three straight birdies from the sixth to jump to 10-under.

The Englishman birdied the 10th, but gave that back when he bogeyed the 12th. Dyson parred four in a row from the 13th before sinking a birdie effort at the 17th.

"I didn't play as good as yesterday, but I scored pretty well. I made four birdies on the front nine and I birdied the par-5s," said Dyson. "It's been a while since I've been up there."

Mulroy had three birdies on the front nine to jump to 10-under. After a birdie on the 10th, he stumbled to a bogey on the 11th. Mulroy ran off six pars in a row from No. 12 before making birdie at the last.

Van der Walt moved into a share of the lead with three birdies in the first five holes. He grabbed the lead at 12-under with a birdie at the par-3 eighth.

Around the turn, van der Walt stumbled to a bogey at the 10th. He quickly rebounded with a birdie on the 11th. Van der Walt remained alone atop the leaderboard as he parred five in a row. The South African dipped back to minus-11 as he bogeyed at the 17th.

NOTES: Coetsee, a two-time winner on the Sunshine Tour, hasn't finished in the top-10 at a European Tour event since 1999 ... The cut line fell at 4-under- par 139 with 74 players moving on to the weekend ... Among those missing the cut were Edoardo Molinari and newly named European Ryder Cup captain Darren Clarke.