Im going to be shooting a vid on troubleshooting a no start or hard start situation for the blaster/banshee. Heres what I have come up with so far. Please feel free to add anything you think I should include. More then likely I will make this a step by step process and I will show each step.
Spark- If you check for spark with the spark plug outside of the quad and there is spark that doesnt mean there is spark inside the engine with 120lbs of pressure. Replace the plug and check your plug gap. I did a vid of that on my banshee topend vid. Check it out. Check your engine ground. Specifically the one that mounts right next to the coil. If the grounds are good then the problem is your CDI box or Stator. Assuming all of your wiring is intact.
Timing- If you sheered a flywheel key (woodruff key) then you will still have spark it will just not be at the right time. The spark will ignite when the piston isnt in position yet. To check the flywheel key (which is the part that controls timing) you need to pull off the flywheel side cover and pull the flywheel with a flywheel puller (they are 20 bucks online and are reverse threaded)
Compression- For proper compression you also need intact reed valves. They are located in between the carb and the engine behind the rubber boots the carb slides into. Also part of compression is back pressure. If you have any major exhaust leaks that could also cause a no start or hard to start type scenario. Obviously you need to test the compression at the topend which is done with a compression tester.
Fuel- FRESH FRESH FRESH. Always use fresh fuel. Meaning you went to the gas station and bought fresh fuel (even some gas station fuel is not fresh). Not use the "fresh fuel" from the jug thats been sitting in the garage for a year. Make sure your fuel/oil mix ratio is correct. (I use 40:1 and have no problems with amsoil interceptor). Also make sure the carb is clean and float is adjusted properly. Also what size jets are you running? What airbox mods if any? What air filter? Is your pilot air screw set properly?
Air- Clean air filter! You need a clean air filter in order for your machine to function properly. You wouldnt run a mile while breathing through a straw so why force your machine to? Also make sure the inside of the airbox and carbs are clean and that your air filter is mounted properly and seals all dirt out.
Spark- If you check for spark with the spark plug outside of the quad and there is spark that doesnt mean there is spark inside the engine with 120lbs of pressure. Replace the plug and check your plug gap. I did a vid of that on my banshee topend vid. Check it out. Check your engine ground. Specifically the one that mounts right next to the coil. If the grounds are good then the problem is your CDI box or Stator. Assuming all of your wiring is intact.
Timing- If you sheered a flywheel key (woodruff key) then you will still have spark it will just not be at the right time. The spark will ignite when the piston isnt in position yet. To check the flywheel key (which is the part that controls timing) you need to pull off the flywheel side cover and pull the flywheel with a flywheel puller (they are 20 bucks online and are reverse threaded)
Compression- For proper compression you also need intact reed valves. They are located in between the carb and the engine behind the rubber boots the carb slides into. Also part of compression is back pressure. If you have any major exhaust leaks that could also cause a no start or hard to start type scenario. Obviously you need to test the compression at the topend which is done with a compression tester.
Fuel- FRESH FRESH FRESH. Always use fresh fuel. Meaning you went to the gas station and bought fresh fuel (even some gas station fuel is not fresh). Not use the "fresh fuel" from the jug thats been sitting in the garage for a year. Make sure your fuel/oil mix ratio is correct. (I use 40:1 and have no problems with amsoil interceptor). Also make sure the carb is clean and float is adjusted properly. Also what size jets are you running? What airbox mods if any? What air filter? Is your pilot air screw set properly?
Air- Clean air filter! You need a clean air filter in order for your machine to function properly. You wouldnt run a mile while breathing through a straw so why force your machine to? Also make sure the inside of the airbox and carbs are clean and that your air filter is mounted properly and seals all dirt out.
