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50mm bore X 40mm stroke = 78.54cc (80cc)

There’s no replacement for displacement!  This is the same engine that a few other companies are claiming as their own “exclusive” – fact is, there’s only one type of YD100 on the market so why bother with anyone else will have the lowest price and first to deliver??

New Features Include:

• 50mm bore single piece cylinder/head (increased weight capacity, lower operating temps, easier starting, sustained power output across varied rpm range)
• 40mm Intake
• High perfromance Speed carb
• Silver anti-corrosion coating
• High performance CDI
• Improved magneto
• High end stainless allen bolts
• Improved gas cap

2017 Original Upgrades:

• Balanced Crank
• 40mm stroke, long rod
• 40mm intake
• Tighter Crankcase for More Primary Compression
• Large, ROUND exhaust port
• Port-Matched intake manifold
• M8 mounting studs
• Wide front mount
• Big transfer ports
• Stainless Steel Allen-head hardware
• Rod is stamped – ZL 40mm

2017 Original Upgrades:

• Balanced Crank
• 40mm stroke, long rod
• 40mm intake
• Tighter Crankcase for More Primary Compression
• Large, ROUND exhaust port
• Port-Matched intake manifold
• M8 mounting studs
• Wide front mount
• Big transfer ports
• Stainless Steel Allen-head hardware
• Rod is stamped – ZL 40mm