Whilst surfing, came across a nice engine top end rebuild guide for GY6 based atv and scooter engines by scooterdawg.com. The link is a 16mb PDF with diagrams, written and visual directions. Well documented and photographed The author definitely put some work into creating this guide and it's worth checking out if you were ever curious about the insides of a scooter engine.

http://www.atvsnetweb.com/!pdf/GY6_Top_End_Rebuild.pdf



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