Posted by ScottyHOMEy on September 01, 2010 at 19:04:06 from (71.241.198.13):
In Reply to: Super C rebuild posted by Alex in Windsorville. CT on September 01, 2010 at 18:37:29:
As far as the bearings, the size they are asking for has to do with compensating for wear on the crank or having it turned down to round again. Thebearings that are in there may tell you something, so have a look at them. The bearings you have will be stamped on the backside -- an "s" or nothing would indicate that they are the standard bearings that would have fit the crank when it was new. If they are stamped .010 or .020, that means they are for a crank that has worn or been machined down that fraction of an inch. Best bet is to have your crank measured. It will take a good micrometer, not a slide caliper, to do it and is easier done with the crank out of the motor. You would be measuring not just for diameter but for roundness. A machine shop can measure it up for you. If everything is all in round and within tolerances, they could tell you what size bearings you need. If it needs turning, they will either do it there or job it out to a shop that has the equipment to turn it, and it is customary to have that shop supply the bearings to fit.
As far as the sleeves, there was some variation in the blocks of the late SuperAs, as the motor transitioned to the 123 used in the SuperA-1s,but I don't believe there was any variation in the outside diameter or length on the sleeves in the SuperC. It was originally a 3-1/8" bore, but most kits anymore are for 3-1/4" and work just fine, adds about another 10 c.i. displacement.
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