the kit i ordered from gasbike.net was a dualstart which came with pullstart already installed on engine and works perfect. i payed $149 plus $30 shipping and is worth every penny. the price of the kits went to $179 and now i dont see them listed as kits no more,but they do have just the dual start engine w/pullstart without kit forsale:$89.
GasBike - Motor Only (MO)
48cc dualstart startfire gt2 grubee with manual/auto clutch with pull/peddal start