You might not be getting spark, the lights are comin on cause your stator is sendin power to them when you kick, you need to check for SPARK. If you don't have spark check your coil, CDI, and grounds. If you've got spark, you need to do a compression check (if a real technical guy gets in here, he'll say to check squish aswell). Get yourself a quality gauge, not a cheap one. If all that passes, you need to clean your carbs, make sure they are hooked up correctly and your flowing fuel adequately.
Eric