Herschelle Gibbs was bowled for one and Boeta Dippenaar lbw after a painstaking seven in 37 balls. Cuffy finished with two for 26 from ten tight overs.

But after Kemp fell lbw to Carl Hooper, South Africa lost their way again.

Hooper (2-27) bowled Jacques Kallis for three and then Corey Collymore ended McKenzie's defiance.

Jonty Rhodes scampered a typical 25, but no-one else reached double figures as Kerry Jeremy cleaned up the tail to finish with three for 48.

South Africa now have a 5-1 lead in the seven-match series.

And their captain Pollock said they refused to be rocked by the controversy surrounding some of their players' off-field activities.

All five of the players who admitted to smoking marijuana in an Antiguan hotel room a month ago were included in the side.

"We dealt with the matter as a team a month ago and we put it behind us, so the actual fact that it came out wasn't something that was going to rock the side," Pollock said.

"But just the fact that the news was out at home and that maybe there were a few comments flying around made the guys very motivated to come out and play well."

And he said the scandal should not taint South Africa's successful tour.

"I don't think it has tarnished our success at all. It's been a brilliant effort by the guys on the tour.

Pollock also paid tribute to the endeavours of unsung squad members like Nel.

"It was nice to see some guys who haven't seen much action come in and perform well. I'm chuffed."

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West Indies: D Ganga, S Chanderpaul, B C Lara, C L Hooper (Capt) R L Powell, M N Samuels, R D Jacobs (Wkt), C E Cuffy, K C B Jeremy D Ramnarine, C D Collymore.

South Africa: H H Dippenaar, H H Gibbs, J H Kallis, J N Rhodes M V Boucher (Wkt), S M Pollock (Capt), J M Kemp, P R Adams N D McKenzie, R Telemachus, A Nel.