Indeed - good for you for sticking at it, being systematic and thorough Raymond.
On the indexing of that "dot & hole" marking - and I am just guessing here - there are a lot of geometric features and a number of components that need to line up for the clutch to work properly and my guess is that rather than try to hold tight tolerances on everything, Yamaha simply machined the assembly together and then marked it to make sure that it would be assembled after service with the mating features ...."mated". If they hadn't done that - they would have needed to make all of the parts much more accurately to be able to assemble everything - and that would have driven costs up without actually providing a real benefit in operation.
The mismatch perpetrated by your P/O could account for your difficulty in removing some of the springs and that last clutch screw. As you said in an earlier post (I think about the timing chain length) ...I wonder what else he left behind?
As for re-assembly, I would suggest measuring the "free" length of the springs to ensure that they are within spec. and also, many folks lap the rust and burrs off the edges of the steel plates by simply giving them a good rub on a piece of emery cloth on a sheet of glass or a steel plate (for flatness).
Pete
On the indexing of that "dot & hole" marking - and I am just guessing here - there are a lot of geometric features and a number of components that need to line up for the clutch to work properly and my guess is that rather than try to hold tight tolerances on everything, Yamaha simply machined the assembly together and then marked it to make sure that it would be assembled after service with the mating features ...."mated". If they hadn't done that - they would have needed to make all of the parts much more accurately to be able to assemble everything - and that would have driven costs up without actually providing a real benefit in operation.
The mismatch perpetrated by your P/O could account for your difficulty in removing some of the springs and that last clutch screw. As you said in an earlier post (I think about the timing chain length) ...I wonder what else he left behind?
As for re-assembly, I would suggest measuring the "free" length of the springs to ensure that they are within spec. and also, many folks lap the rust and burrs off the edges of the steel plates by simply giving them a good rub on a piece of emery cloth on a sheet of glass or a steel plate (for flatness).
Pete
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