KUALA LUMPUR, Malaysia — Justin Thomas had a 6-under 66 on Friday to take a two-stroke lead halfway through the CIMB Classic, staying within striking distance of the tournament record he set in winning the title here last year.

He started the second round in a three-way share of the lead with Keegan Bradley and Derek Fathauer after opening with a 64, and followed up with a bogey-free round containing six birdies to move to 14 under, two shots clear of Anirban Lahiri.