VegasJeff Posted October 9, 2009 Report Posted October 9, 2009 just wondering if anybody could give me the low down on how to lap a flywheel.I checked the search function with no success.I think AK heaten explained it once on here. thanks in advance. Jeff. Quote
Snopczynski Posted October 9, 2009 Report Posted October 9, 2009 put some lapping compound on the inside of the flywheel hub, or the crank stub. Then work the flywheel side to side on it. Rotate it gradually around as you go. Your done when the crank end is smoothed out, and the motion doesn't feel very gritty anymore. Quote
racer Posted October 9, 2009 Report Posted October 9, 2009 What's the point of this, corrosion issues? Quote
AKheathen Posted October 10, 2009 Report Posted October 10, 2009 the surfaces can get worn and glazed, and develop some imperfections that make it hard or imposible to seat the flywheel on the taper completely, or square. also if your flywheel comes loose. if you don't seat it good it can start sheering keys. if you're ever in a pinch, and hve enough tooling, you can clean it up with a file/emery cloth and heat-seat the flywheel. had to do this out camping this summer. only problem is when you need to remove it..... think i remember it coming up as part of a flywheel key discussion, but don't totally remember it for sure. my method is to use the nut tightened down with a flat washer, then backed off just enough to spin the flywheel. don't go too crazy, or you can make a ridge on the shaft that will keep the flywheel from seating all the way, too. apply a little rocking pressure as you rotate it. either way works. you're just trying to get an even grip on the shaft Quote
sinisterboo Posted October 11, 2009 Report Posted October 11, 2009 He said "even grip on the shaft" . Good write up, but whats the campfire method? as that seems to be to only time anything ever breaks on me. Usually on a sand dune 300 miles from my shop. Quote
AKheathen Posted October 12, 2009 Report Posted October 12, 2009 well i usually pack a good toolkit, which happened to include a couple microtorches, files, picks, and other stuff i used, but i heated the center of the flywheel to expand the bore, and installed it on the cool crank when it was ready. only need about 200 degrees to make a kung-foo grip. rode another 10+hrs before going home. Quote
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