2009 GP1R-150 Perfection with a Modern Twist. UM is proud to announce the introduction of the new GP1R-150 to our scooter lineup. After two years of research and development plus thousands of miles ridden on test vehicles, the new GP1R is ready to zip around town with its fuel efficient yet powerful 150cc, 4-stroke engine giving you up to 98 mpg estimated. With the same quality and fit and finish of our Matrix models, the modern looking GP1R features a smaller frame and lower seat height which makes it perfect for teenagers, students, women or simply shorter people. It is also easy on the checkbook, and visits to the gas station are a joy.