All 2st ducatti vespa cdi onto sem stator

so i bought an 84 wr 240. 5th ride blew piston,bought 250 piston, bored n rebuilt to find out its off balance( twisted crank), back apart trued new seals n bearings, reassembled , now no spark i must have rotated it without the spark plug grounded, dead cdi so in the search to find one i discovered so many that seem so similar. so i ordered thu ducatti one for vespa for 33$ total shipped from germany. plug in got spark check by timing light its on time ish about 2mm btdc. put plug in and kick and it fires and starts, but wont rev past about 2000rpm, timing light says the spark is cutting out at above 2000 or so rpm. think think think, check many a forum saw some using resistors and capacitor to buffer the trigger signal. the sem stator has higher resistances than the vespa one so i suspect the sem puts a stronger charge and trigger signal. so using a variable potentiometer i made a simple voltage reducer, (like 2 series resistors) to drop the trigger voltage and voila , now revs up i live in an appartment so i cant run it for too long in the underground parkade, but for the 10 seconds it ran for, it seemed better, hitting 7000 rpm smoothly and not cuttin out at 2000. my refining is not quite finished nor do i know if it will last, but ive progress and thought to share. and i do sincerely appologise for making mix match husky, but someone has to forge a way to replace the expensive not available mith cheap and readily available
i thought this was a good idea
hindsight is,,,

i like this bike, but shes angry,looks neglected, and judging by the nearly new trelleborg tires, i suspect shes hasnt had much riding for the last decade. now rescued, safe and in a good home. must have had water in case as the crank case inside has corroded on the inside, where the original black coating was machined off for clearance purposes. how unfortunate.the rear fender was missing so ive crafted one from a white plastic pail, even cut around to keep the warning of the drounding baby. funny thing is that nobody even notices that its not original until i point it out, i think im gonna mount some sort of tail light on it.

so i test drove alright , but not quite as fast as it could. im not sure if timing advance curve is right. or if there is in vespa cdi? now im thinking to get a variable timing curve cdi. first more ride to get in tune, might be thats it. also i delayed the timing so it dont kick back like it used to, which no doubt effects power

Post your questions here, you'll probably get more feed back.
http://www.cafehusky.com/forums/vintage-restoration-projects.67/

ridden more, tuned a bit, rips a plenty
seems i need more armour and pilot skills, and a clutch lever. cursed blackberry, piq-piq, under bandage, sting more, they'll come out, in time

about the vespa cdi coil, i went back to the drawing board. it was a hastle, adjustin the pot for start speed spark of high speed spark, and if it wasnt starting wondering about the spark. so i tried the nice looking gold box in aluminum heat sink, supposed to ge racing curve.that system fired once at tdc and next fire would be half way up compression stroke. nomatter how much i rotated stator. so i found blueprints for original sem cdi and set out to build one. finally, after months of figuring ive a gone full circle and now take the other path to find out its only a few hours not months, i should have done this first. so i made my own cdi and it works on many 12 volt igniter coil
after a four hour rip im so impressed that ill offer to make them upon request. small like a flasher relay like one inch cube. actually if you use the chinese scooter round coil with the green and black bossed terminal conector that hangs by one bolt mount hole, itll be a lighter set up than original one piece cdi coil, not by a hole lot, but better than heavier. and i think it will work with any sem stator, i think. some where i read they changed resistances on stator windings at some pointand so the one i made is for the 22 ohm trigger pickup and 1750 ohm ignition power coil. i forget actual values but around there.
if you go to any bike shop in this town they tell you the part is obsolete and nothing to replace it with. even though they where used well into the 2k century. they will try to sell you on a whole new set up thatll cost a fortune. i dont know if there any better, possibly, more in it to go wrong probably as with most modern stuff.

... and heres a thought, cause i can build cdi so small, why not put 2 unit in one block, for when you finally reach BFN and it craps out, you swich 4 wires and run on backup.ive ordered more parts and when they arrive thats what im gonna do. and with the small size of the scooter coil, you could have an entire redundant ignition fit nicely under the gas tank. all except for the stator.if that blow youre up the creek