91tsiawd Posted February 15, 2009 Report Share Posted February 15, 2009 Today, I ran into a issue while tearing my motor down. My Flywheel seized itself to my 4mm crank. I'm not sure how this happened, timing key was not twisted, anit seize was used, and it was a brand new crank (4 rides on it). I ended up going though 3 flywheel tools (threads were ripped right off of them), and finally tried welding the flywheel tool to the flywheel only to have the welds snap off. After the tools broke off I decided to cut the flywheel off (outter section), and then removed the crank from the case, and put the crank in the press. In my case the threads are bent but I'm able to screw the nut on the end easily. I'm more concerned with the crank now being out of balance due to the bend. After nearly breaking the press The flywheel came off, but in the process of trying to remove the flywheel from the crank the first 1/2" of the threads that are used to secure the flywheel are slightly bent. The shaft the flywheel sits on it fine though. I'm wondering if anyone has had this issue in the past, and if so were they able to pay the manufacturer to correct the problem or came up with another solution. Any help would be great right about now. Quote Link to comment Share on other sites More sharing options...
spurdy Posted February 15, 2009 Report Share Posted February 15, 2009 Today, I ran into a issue while tearing my motor down. My Flywheel seized itself to my 4mm crank. I'm not sure how this happened, timing key was not twisted, anit seize was used, and it was a brand new crank (4 rides on it). I ended up going though 3 flywheel tools (threads were ripped right off of them), and finally tried welding the flywheel tool to the flywheel only to have the welds snap off. After the tools broke off I decided to cut the flywheel off (outter section), and then removed the crank from the case, and put the crank in the press. In my case the threads are bent but I'm able to screw the nut on the end easily. I'm more concerned with the crank now being out of balance due to the bend. After nearly breaking the press The flywheel came off, but in the process of trying to remove the flywheel from the crank the first 1/2" of the threads that are used to secure the flywheel are slightly bent. The shaft the flywheel sits on it fine though. I'm wondering if anyone has had this issue in the past, and if so were they able to pay the manufacturer to correct the problem or came up with another solution. Any help would be great right about now. I can help you out. PM sent. SP Quote Link to comment Share on other sites More sharing options...
PACIFIC NW BANSHEE Posted February 15, 2009 Report Share Posted February 15, 2009 Today, I ran into a issue while tearing my motor down. My Flywheel seized itself to my 4mm crank. I'm not sure how this happened, timing key was not twisted, anit seize was used, and it was a brand new crank (4 rides on it). I ended up going though 3 flywheel tools (threads were ripped right off of them), and finally tried welding the flywheel tool to the flywheel only to have the welds snap off. After the tools broke off I decided to cut the flywheel off (outter section), and then removed the crank from the case, and put the crank in the press. In my case the threads are bent but I'm able to screw the nut on the end easily. I'm more concerned with the crank now being out of balance due to the bend. After nearly breaking the press The flywheel came off, but in the process of trying to remove the flywheel from the crank the first 1/2" of the threads that are used to secure the flywheel are slightly bent. The shaft the flywheel sits on it fine though. I'm wondering if anyone has had this issue in the past, and if so were they able to pay the manufacturer to correct the problem or came up with another solution. Any help would be great right about now. I dont think there would be any problem with the crank being out of balance.Think about like a wheel on a car when they add weights they dont add them to the center of the wheel they put them on the lip of the wheel .The further you go out from the center of the rotating mass the more effect it has on balance.So if you bent/mushroomed the end of the crank and it is near the center of your rotating mass should not be a problem.And you can buy a die and rethread the end of your crank i hope that helps Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted February 15, 2009 Report Share Posted February 15, 2009 Did you lap the new crank and flywheel? That could have caused your problem if you didnt do that. josh Quote Link to comment Share on other sites More sharing options...
91tsiawd Posted February 15, 2009 Author Report Share Posted February 15, 2009 I just wanted to thank everyone for their help (Big thanks to Spurdy for taking the time to give me a couple diffrent options). It's great how clear you can think after talking to a couple people who have been through this before. Thanks again guys! Quote Link to comment Share on other sites More sharing options...
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