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Old 08-31-2013, 11:46 PM   #59
disston's Avatar
Joined: Mar 2011
Location: Silver Spring, Md
Oddometer: 9,951
Here's one problem mentioned by Mr Bum but it's not the one I'm looking for;

One last bit of information about the cylinders needs to be made here. In the later 1980's, BMW added a sort of "step" machined into the cylinder spigots, and a similar matching step was in the crankcase opening. If you try to fit late cylinders to an early bike, you MUST machine-off the step.

Never memorize something you can look up.
---Albert Einstein

Pay your debt, piratejohn.
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