40mm high rev head kits

I have 4 x 40mm 5 port cylinder barrell kits complete with matching windowed pistons, shamfered rings, 10mm pins, clips ect. this head kit is suited to all owners of samauri and other types of bikes fitted with the 40cc engine along with the 10mm x 32mm stroke crankshafts. this type of modified cylinder is very popular in u.s.a. and results have shown rpms of and above 13,500 rpms, these complete & ready to bolt on kits are now available at a price of only $40 each. contact RD Racing for any info on these.

im dont know much about head kits but would these head kits suit a 47cc cag?

Yes. It will fit.

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many suppliers class the 40cc cag engine as a 47cc , the only way to check your engine size from the outside is to look at the cylinder cooling fins on either pullstart or clutch side , then count from the bottom fin up how many fins there are before the bulge in the cylinder stops [ bulge is outer transfere port surround ] 3 fins is 40cc and 4 fins is 49cc.