Ok heres the deal I put a piston in my friends ds650 for him, it drove into the garage. Well after we put the new piston it it cranks just fine, just that we only get spark when you intially push the start button or when you let off the start button. Tried a different cdi but to no avail, looked for wires that had become disconnected and there where none. Also we checked fuses and the battery, any one else had something similar happen? Thanks in advance