engraved cylinder?

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99sr220
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Posts: 91
Joined: 04:16 am Aug 23 2010
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Location: Thailand

engraved cylinder?

Post by 99sr220 »

my 220 has 'D-3' engraved on the cylinder. Doing a search it seems this is the mark of someone who has worked on the bike. Has anyone seen markings like this?
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