MotoGP rookie Cal Crutchlow suffered a fall from his Monster Yamaha Tech 3 late on day two of the Sepang test.

Despite the off, the former World Supersport championship improved from 16th to 15th out of the 20 riders present, having improved his lap time by almost one second.

"Good day today and was happy at the end," Crutchlow, who is recovering from similar shoulder surgery to Valentino Rossi, wrote on his Twitter page.

"Improved lap time 1 second from yesterday and was consistent enough. Small crash at end but I am fine. No real reason other than track was greasy because so hot.

"Pace isn't too bad from last year's race. Hope to improve tomorrow try more settings and do some more laps."

Of the 17-race riders present, Crutchlow was faster than multiple MotoGP winner Loris Capirossi (Pramac Ducati) and fellow rookie Karel Abraham (Cardion AB Ducati).