Don, are you wondering about that specific bike? Or just about that year of DRZ? If it has the stock automatic one, you need to replace it with the 03 version or a manual. That much I know. I had an 01 S model and can answer some questions. Can't help with jetting on the E though or the suspension since those were different back then, but most of the rest were the same.
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Rusty Myers
03 WR250F
89 XL600V Transalp
76 GL1000