SkyHawk Cylinder Kit for 66cc

GruBee Skyhawk


Latest and Greatest 66cc SKYHAWK CYLINDER!    

  • Fits 66cc high pin piston engines with 47x38mm bore and stroke. 

  • This SkyHawk Cylinder deck height is 69.5mm for 38mm stroke engines and gives an exhaust port timing of 143 degrees and a transfer port timing of 120 degrees!  

  • Heads up:  DO NOT USE with 40mm stroke engines that have a cylinder deck height of 70.5mm.    Even if you add a 1mm extra bottom gasket the port timing will be off and will result in a poor running engine.  Therefore, don't do it. 

  • Intake and exhaust port stud center line to center line spacing is 40mm. 

  • Complete cylinder kit for SkyHawk Gt5, Gt5A and Gt5a-ES and other 66cc 47x38 engines with hi pin pistons with long conn rods. 


  • Angle Fire Head, 

  • 69.5mm deck height HP Cylinder with big round hole exhaust port.

  • 40mm stud spacing for both intake and exhaust.

  • High pin Piston and rings with 10mm dia. wrist pin, needle brg. and (2) G clips,

  • 4 Gaskets, M8 head bolts, M8 nuts are substituted for acorn nuts.

  • 40mm Intake tube

  • No spark plug is included so best order those items separately if needed.   Cost to ship a spark plug can be included with this cylinder kit at no extra cost.

WARNING:   Be sure you know your engine and have determined the above specs are what you need.    This is a non-returnable item!   It will not work for engines with 70.5mm deck height and 47 x 40 bore and stroke 69cc engines.