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GY6 4 valve cylinder head with 4v big bore piston

  • Sale
  • $330.00


Here we have the amazing 4 valve head for the GY6 125cc/150cc engine. This upgrade allows twice the amount of air and fuel through the engine. This upgrade paired with a big bore kit will blow your mind! There are big power gains here. This kit will come with the complete cylinder head, studs, performance 4v cam shaft, cam chain, cam support, valve cover, gaskets, and your choice of piston (sizes 58.5mm, 61mm, or 63mm). 

THE ENGINE CASES WILL NEED TO BE SPLIT TO INSTALL THE LONGER CAM CHAIN. THIS IS THE PERFECT TIME TO BORE THE CASES AND INSTALL A 63MM BIG BORE KIT!

This is the perfect upgrade for your gy6 ruckus motor!