Features: 1) StarFire Gen II our latest new model with 20% power 2) Available in 2-cycle, 48cc and 55cc models 3) Pedal start 4) New cylinder, new head, and new carburetor design 5) Steel lined piston sleeve 6) High performance carburetor 7) Angle fire spark plug 8) New muffler for improved exhaust flow 9) Everything included to install on a vee frame bicycle. 10) Options available: a) Available with 2.5L or 4L gas tank; 9 hole 44T or 50T rear chain wheel sprocket b) Standard bike or heavy duty 415 chain, push button clutch lever, improved throttle with integral dual cable brake lever c) Ball bearing chain idler d) Many muffler options, and 90 days' warranty period 11) Exclusive WD distribution territories available