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Message: [QUOTE="viking20, post: 926301, member: 33877"] Changing the bearings in the case is really not that difficult. You sound like you already know about applying heat to the cases , and dropping the bearings in the freezer overnight. With a suitable drift they should tap out quite easily. If you disassemble the engine and check all the bearings , you might be able to get some of them from a bearing supplier instead of oem. You dont have to align anything as far as I know , and the bearings will be very easy to install when they have been in the freezer , and you heat the cases for a minute or two. You might want to use a press , instead of a hammer. That will also make it easier to get the crank out. Any machine shop that does engine work can help you out . The crank halves will have to be aligned after the conrod-bearing has been changed . Again , any shop that does engine work can do this for you. Remember that the rod in itself is the outer bearing surface for the lower bearing ( unless your engine is very special ) , so it will be best if you change the bearing and rod as a set. I know this sounds like difficult work , if you havent done it before , but its really not that complicated. My sons have a habit these days of dragging home 20 or 30 year old 50 cc mopeds , in desperate need of repair. We repair cranks , replace bearings and so for lots of other kids and dirtbikers etc. Its really not that hard , if you think about what you are doing , and know what your limits are. You cant fix the crank yourself , only a shop with the correct aligning tools can do this for you , only takes an hour or so... [/QUOTE]

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