the carbide and helix use the same engine as the hh twister 200 i'm not sure if the hh 150's are the same.They did not produce the 200's for very long.
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asw carbide 1500 main and clutch springs HP clutch and bell koso variator performance cdi uni redneck intake fmf exaust 9gram rollers 39 tooth sprocket 140main and 40 pilot jet
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