78250

Hi Guys First of all Thanks very much for your help with this, i now need to think about what to do next, before buying a CDI box i need to be sure that i can install and wire it to produce a spark, the issue i have is that the bike has been robbed of all its wiring and connectors, so all i have are the wires coming out of the magneto / flywheel without a connector plug attached, the coil unit is present but no wire to it, i will try to locate a wiring diagram or perhaps another bike to copy the colour of wires and correct connections from Magneto to CDI box and then to coil unit. will get back to you if i am succesfull ! Thanks once again Gordon

Hi, Thanks for the info, i agree that is a good price, if i went ahead with a purchase could you assist with info re which colour wires i connect from the magneto / stator coils to the coil unit to obtain a spark, i am only interested in running the engine and not supplying power for lights etc Do you accept PayPal ? Thanks Gordon

Thanks for all the replies, i contacted several Yamaha agents and one has confirmed as you say that the bike is a DT250F, the CDI box is missing so now looking for a used unit, will then need to find out which colour wires from the magneto unit go to the CDI box and coil, Thanks again for all your help

Thanks for the response, im late in writing back as i am in western Canada, just re-checked the numbers its definately 2x9000137 on both the frame and engine, manufactured in 9 / 78, on the lower right side of the cylinder base its stamped 246 cc, am trying to get a magneto flywheel puller to check points and condenser, looking through the 2 slots in the magneto i cant see any points but guess they are in there somewhere ? Thanks again

Hi Merv Thanks for the reply, sorry about the intro, new to forums in general, the bike has no documents, i have searched the web for model / seial numbers but cannot seem to find a model that matches the age, the frame and engine number are 2x9000137 and the makers plate states a 78 model, so im a bit stumped right now Thanks again for your response Gordon

Hi, am a newbie here and looking for some help if possible, this will probably be the first of many questions as im new to Yamaha in general, just bought a very rough 78 250, engine / frame no 2x9000137, im trying to get it running, problem is that 90% of the wiring has been removed, can anyone assist me by advising which colour wires from the CDI magneto need to go where to enable to get a spark at the plug, i am only interested in getting the engine running, will not be fitting any lights, I assume that with this system i do not need a battery to run the engine ? Thanks for any help, and im sure i will be back with lots more questions !