Has anyone put an '01 or later tail lamp on a pre '01? I know there is info on integrators and R1 tail light swaps, but I can't come up with anything about a straight swap.  I'm not looking to change the whole tail.
If someone in their infinite wisdom could please point me in the right direction....

i would dump the idea on '01+ tail lamp swap...they're too different

no more different than installing an R1 taillight....maybe if you could find someone with an 01gs500 or 04+gs500F you could do a test swap to see if they fit. Or just hit a salvage yard or ebay to buy one used. if it doesnt work you can sell it on ebay.

Thats what I did to find the cb100xx clearalternatives lens fit the 01 (they since have them for the 04). I just bought it and chanced that I could make it work.

Your only problem will arise if the 01+ taillight is significantly wider or taller than the older version. If its not, you could probably fit it in the space for the 89-00 version.

this is just an educated guess...i think the 01 lamp is significantly wider and slightly taller...also with different angles.

here's an aproximate measurements of 01 lamp:

width: 6 6/8"
height: 3"

Thanks guys, and Jetswing thanks for taking the time on the measurements.  Height is not a problem but the width may be if it doesn't taper at the top.  I'm not afraid of cutting plastics but I think I'll shop for another solution.  I just want to freshen up the tail of my bike, it's the last part that seems to really date the bike.