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Here we have
the /2 Bosch Magneto, although this one still works
OK, it is our experience that its more a question
of "when" than "if" the 40 year
old coil will fail. The old coil feels soft
and squishy, that means the lacquer insulation is
breaking down. A bad coil will make the bike difficult
to start, especially when hot. This is one item we
will replace with a new one before it lets us down. |
The oil pan
was removed and as you can see the oil was old
and sludgy. Good new is we don't see any metallic
particles but its a good thing we didn't run the
bike with this oil. Always remove the oil pan before
riding a newly purchased old BMW. At the very least
clean it. The /2's do not have oil filters, when
we get to the slingers we will know if they
are full of sludge. |
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The pistons
are still the original 71.95 MM size, that means
this engine has never had an over bore. These pistons
are scuffed pretty good on the sides and although
they would probably work OK we will replace them
with a new set of first oversize. |
Since BMWs
don't have a lot of chrome and the German chrome
never was very good, these are the parts we
will be reechoing.
Its not cost effective to rechrome some items such as exhaust pipes,
mufflers, wheel rims and fender braces. For parts like these its
advisable to simply replace. Its a toss up about chroming axles,
they are a precision fit and if the chrome gets to them they will
probably be to tight for the bearings when they come back. We will
go with a new set of stainless axles in their place. |
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These
aluminum parts are in good condition. Aluminum
polishing costs much less than chrome so we will
send these parts to the polisher. Don't bother
polishing any part that has a dent in it, the defect
will only be magnified when it gets polished. |
Here's a photo
of the parts we will be sending out for cad plating,
its basically all the steel parts that have
the dull silver finish. Cad plating is very inexpensive
if you do the prep work yourself. Each part must
be bead blasted perfectly clean and free of the
old plating, be sure to dress any buggered parts
with a file before blasting. If the holes in your
wheel seal nuts are elongated you can drill them
oversize and they will look new again. Do not use
cad plating that is only acid dipped, if you want
the best possible finish its worth the effort to
bead blast the parts first. |
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The shocks
have leaked some oil and they are old, our bike
will get new shocks front and rear. These are not
easy parts to replace so its best to change them
for new if you want to do the job right the first
time. |
Here's our
engine block, the timing gears are perfect and
the crank looks good so far. We will know more
when we get it completely disassembled. |
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Next week in episode 3:
We
will get deeper into the
engine and inspect the rod
bearings and slingers and
our frame parts should be
back from the powder coaters.
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