Description
Big bore kit with big valve head for converting your 50cc engine to 72cc.
The kit is a creation of our very own; displacement has been increased from 49cc to 72cc. Various parts were tested to find the very best combination.
The resulting power was increased by around 33%, slightly downhill increased top speed to 53mph (+8mph), steady uphill increased top speed to 39mph (+7mph), and acceleration was increased drastically.
AMAZING FROM A 50cc 4-STROKE!
Kit includes –
Big valve head 23mm/20mm
Cast cylinder
Nibbi PE17FL carburetor
Red air filter
Intake manifold
Head and cylinder gaskets
Piston kit with rings
Spark plug
Barrel dimensions –
Bore diameter – 47mm
Cylinder sleeve length – 88.7mm
Outer cast length – 63mm (face to face)
Made to fit – YX, Lifan, may fit other engines (check dimensions)
Additional parts that may be required –
Throttle cable
Carburettor spacer set ( Available in our store – ENP016-2 )
24mm exhaust gasket ( Available in our store – MXA0194 x5 )
Valve cap covers ( Available in our store – MXF0178 )
Take off plate and gasket ( Available in our store – MXF0134 )
Cylinder head rocker inspection cover and gasket
Timing chain cover and gasket
Please note: The head is provided as seen in image one; no covers are included. Typically, the engine’s original ones would be utilised.
We advise that a mechanically able person should install this big bore kit; valve clearances will need to be set upon installation.
This product is designed for race purposes only; as such, no warranty will be provided.
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