hi guys,
5bears.com has transistor ignition schematics that look the same as those at jerry- howell.com, just go to his radial engine section. beware though, these are current hungry kettering type ignitions, not CDI! i experimented awhile ago with an ignition module from an old suzuki swift distributor and although it was compact, light, and super reliable it took about 2.5amps at 6volts! would need a massive battery to get any decent run time. sure had fun though, even with all the shocks i got!
dave