i have a 92 arctic cat 550 ext and i just got a cylinder back and i installed it, then i put everything back together and got it to run on 1 rpm, and i had perfect spark. now after about 30min of pull starting it, it had no spark. i replaced the coil pack, wasting 47$ and still getting no where. i need help and will take any suggestions to where the gounds are, i have no book on this sled. i have been dying to ride, so if anyone wants me to join them.