On Monday, September 28, 2015 at 5:23:02 PM UTC-4, wrote:
I understand you can use glider hours towards a private pilot license, but can you use motor glider hours toward a glider pilot license?

From http://www.ssa.org/GliderPilotRatings

"Holders of a valid FAA Power plane license with 40 hours as pilot-in-command need a minimum of 10 solo flights to qualify to take the glider flight test. No written exam is required to add a glider rating to a power license. In all cases, refer to the Federal Aviation Regulations for details on pilot licensing."

Your CFI-Glider decides how many glider flights you need before you receive the endorsement to fly solo in the glider. The amount of pre-solo training that you require depends on your present skill and aptitude. In that sense, your experience in a motor glider may help you to solo sooner (or later).