Kitaco SE-Pro 124cc Bore and Stroke Kit for CRF50 CRF70 Monkey Gorilla. After years of domination with the Ultra SE head, Kitaco has now completely redeveloped it with larger valves, straighter ports, larger combustion chamber, new auto decompression camshafts, and even stronger valve train. Features include:
Complete bore and stroke kit comes with assembled SE-Pro head, SE-Pro rocker arms, 54mm aluminum cylinder, 54mm piston kit, 54mm H-Rod crankshaft, SD cam chain, cylinder studs, 8mm Denso plug, 3 bolt cam sprocket and all assembly gaskets and hardware. Head covers are not included.
- 29mm intake valve, 24.5 exhaust
- reshaped intake and exhaust ports
- 2mm larger combustion chamber
- auto decompression, nitride coated camshaft
- stepped valve diameter to lighten reciprocating mass while maintaining strength and durability
- L shape, flex type piston rings