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mnwingnut

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  • Great Instructable! I had a CB200T as my first vehicle, and I had forgotten how soft and miserable those JIS screws were.I have a tip for shortening bolts that helps preserve the threads. If you have a nut that's the same thread size and pitch, run that up threads all the way to the head, and if you have a second nut, run that up the threads as well, just past the point of where you want to cut. Now secure the bolt in a vice safe in the knowledge that the vice won't mess up the threads. If you don't have nuts that fit, don't worry: use a rag or a few winds of tape to protect the threads and gently secure the bolt in the vice. You want the excess hanging outside of the jaws.Now take a hacksaw and cut halfway through the bolt. Don't go all the way, just to the middle.Next, grab a ball pe…

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    Great Instructable! I had a CB200T as my first vehicle, and I had forgotten how soft and miserable those JIS screws were.I have a tip for shortening bolts that helps preserve the threads. If you have a nut that's the same thread size and pitch, run that up threads all the way to the head, and if you have a second nut, run that up the threads as well, just past the point of where you want to cut. Now secure the bolt in a vice safe in the knowledge that the vice won't mess up the threads. If you don't have nuts that fit, don't worry: use a rag or a few winds of tape to protect the threads and gently secure the bolt in the vice. You want the excess hanging outside of the jaws.Now take a hacksaw and cut halfway through the bolt. Don't go all the way, just to the middle.Next, grab a ball peen hammer and strike the excess along the threads. The goal is to cleanly shear the bolt. If done with conviction, the cutoff piece falls away and what remains is a bolt the correct size AND the threads are intact. If you used nuts to help hold the bolt in vice, the act of removing them will clean up the threads as well. Even if you used the rag/tape method, though, the threads are almost always clean and ready for use.Oh, and whatever you do, do NOT even THINK of exceeding that red line at 70MPH on the speedometer of a CB200T. Few old motorcyclists have done it and lived to tell the tale. ;-)

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