okay so i bought a 1977 ski doo Everest 440 that ran but would not turn the pto. i fixed that problem by replacing the points and spark plugs. Then it ran great till it ran for 10 minutes and started to bog out no matter how much throttle i gave it. After inspecting the spark plugs i found out i was only getting a strong spark from the left cylinder (if you`re sitting on it looking foreword). Then i proceeded to test the external coil for the right cylinder and it was okay. so i reset my points and replaced the condensers without adjusting the timing (i assumed the timing was good since it ran prior to this). The new condensers also tested good. Now i get no spark whatsoever. Any help or insight would be greatly appreciated.