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FJR Motorcycle Forums
Technical & Mechanical Problems
DIY valve clearance check/adjust
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<blockquote data-quote="garyahouse" data-source="post: 1158568" data-attributes="member: 20946"><p>Don't over think this. The 150 paper you have on hand will work fine to hog off most of the stock, though Fred is right in suggesting something more like 220 or 240 for roughing off most of the stock. Finer paper is less "grabby" and thus makes it slightly easier to keep 'em straight. But the 150 will indeed work fine if you are careful. Leave about a 1/2 thousandth extra meat on there to finish it up with a finer paper, like 400 or 500. One way to know that you've successfully removed all the deep scratches is to take your final few passes with the rough paper all in one direction. Then as you use a circular pattern to remove those deep scratches with a finer paper, you'll know when the last deep scratches are gone because they were all straight and going in one direction. Once they're gone, you're done. Mike the rascal in several places around the outer edge. If it's within about a thousandth, you've done a great job.</p><p></p><p>Vernier caliper: are you referring to those really old rascals that have no dial on them? Get out your magnifying glass. Is it accurate enough? Measure a piece of shim stock or a feeler gauge to practice. If you can accurately measure that, you'll do fine. If you're dealing with a really old one, you might have significant wear on the tips. Check the difference between using the tips and using the middle of the caliper jaws where they don't wear much. You may get very different numbers. I've seen them out by .002 inch.</p><p></p><p>Good luck</p></blockquote><p></p>
[QUOTE="garyahouse, post: 1158568, member: 20946"] Don't over think this. The 150 paper you have on hand will work fine to hog off most of the stock, though Fred is right in suggesting something more like 220 or 240 for roughing off most of the stock. Finer paper is less "grabby" and thus makes it slightly easier to keep 'em straight. But the 150 will indeed work fine if you are careful. Leave about a 1/2 thousandth extra meat on there to finish it up with a finer paper, like 400 or 500. One way to know that you've successfully removed all the deep scratches is to take your final few passes with the rough paper all in one direction. Then as you use a circular pattern to remove those deep scratches with a finer paper, you'll know when the last deep scratches are gone because they were all straight and going in one direction. Once they're gone, you're done. Mike the rascal in several places around the outer edge. If it's within about a thousandth, you've done a great job. Vernier caliper: are you referring to those really old rascals that have no dial on them? Get out your magnifying glass. Is it accurate enough? Measure a piece of shim stock or a feeler gauge to practice. If you can accurately measure that, you'll do fine. If you're dealing with a really old one, you might have significant wear on the tips. Check the difference between using the tips and using the middle of the caliper jaws where they don't wear much. You may get very different numbers. I've seen them out by .002 inch. Good luck [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
DIY valve clearance check/adjust
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