Zeda100 (YD100) Complete 80cc/100cc Get the Power!! 50mm bore single piece cylinder, an upgraded CDI, Performance Speed Carburetor and more. New Features Include: 50mm bore single piece cylinder/head (increased weight capacity, lower operating temps, easier starting, sustained power output across varied rpm range) High performance Speed carb Silver anti-corrosion coating High performance CDI with Yamaha components Improved magneto High end allen bolts Improved gas cap This bike engine kit includes all of the necessary items to turn your pedal bicycle into a motorized speed demon with easy to follow instructions and phone support if needed. YD100 Zeda 100 Complete Engine Kit Includes: Zeda100 3+ HP Engine with one piece cylinder/head 50mm Bore, 40mm Stroke - Actual U.S. engine displacement 79CC Pearl coating protects against corrosion High performance Speed Carburetor. Angled LD Z8C spark plug Improved magneto Stainless steel allen bolts Better balanced crank Upgraded bearings / 60% thicker crank case around bearings Stuffed crank case Large intake port (40mm bolt hole width) Round exhaust port 40mm crank stroke (more powerful, efficient, and reliable) Type B piston (high wrist pin) Long rod (89mm) Larger 8mm x 1.25 engine mount studs Mounting Kit & Accessories High performance CDI with Yamaha components Black teardrop gas tank (2L) w/ new fuel cap, fuel valve, fuel filter, and fuel line 415 Heavy duty chain with chain gaurd Ball bearing chain tensioner New chrome muffler (longer angle for pedal clearance) Throttle assembly w/gooseneck style throttle cable Twist throttle and cable with matching grip and kill switch New quick release clutch handle Large front mount for bicycles that have large down tubes Available with 36, 44, or 48 tooth rear sprocket & wheel adapter Spark plug socket tool and gear removal tool I