Hy Just bought a 87 super magna 700c. big mistake so far. From the off it ran rich and couldnt get it to idle decent. So instead of calling dealer I thought stale oetrol and handed it over ti my lical bike mechanic to sought out. Ok, went like a dream, after 12 miles it went all fluffy and stopped. It wouldnt start? Had a ciggie cooled down and it started but ran like %!¤ before stopping again, then again and again. Mechanic took it for test drive after thourouly cold and same again after about 6 miles. Changed coil packs no difference. Any ideas please