i got a 250 from a friend and it will not start once it is warmed up. there is no spark at all. i put a new coil on it and that did not help it. the motor is worked i don't know what mods were done to it but i know that it is bored over alot if that helps at all. any help would be great. also does anyone have any parts they want to sell please let me know i need a bunch for it

 

I have a radiator and a gastank for one if you need them.