Durable, simple, low-maintenance, 124.9 cc air-cooled single-cylinder 4-stroke engine develops the smooth, tractable powerA step up before they step out Ultra-reliable electronic ignition simplifies maintenance. -20 mm carb with light throttle action. -Closed crankcase vent system safeguards against engine oil contamination -Primary kick starting for easy starts in any gear. -Lightweight, up swept, competition-type exhaust system utilizes a quiet muffler/spark arrester. -Heavy-duty manual clutch with light, smooth, progressive engagement. -Convenient electric start makes starting a breeze.