Pitbike head and piston change (YX 160)

We had some valve issues and we decided to update head to HC.
New engine snapped the valve and that lead to smashed piston and head so we decided to order new piston and cylinder with head (high compression).
Parts were ordered for YX 160 engine.

Part list:
Head - http://www.sport-toys.com/epages/990690746.sf/en_GB/?ObjectPath=/Shops/990690746/Products/T150YXC
Piston - http://www.sport-toys.com/epages/990690746.sf/en_GB/?ObjectPath=/Shops/990690746/Products/P60

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