I have one only P.B.U. Sleeper Head Kit to suit all cag engines, this complete kit consists of a 44mm cylinder bore, twin boost ports, widened and raised exhaust port, modified piston including window, shaved rings, gasket kit plus ngk-bpm7a sparkplug. this design by pocket bikes unlimited is there most powerfull single piece head kit, retail on these kits in australia is around $260 but i was lucky to obtain one of these kits for $120 , so thats the price for this complete and ready to bolt on kit from the u.s of a. contact RD Racing.
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