The E version doens NOT get as good as gas mileage I understand. Also the other advantage of the S model is the S carb may not produce as much power, it is not as sensitive to elevation changes as the E model carb. I have an S version with aftermarket pipe, 3x3 mod and E cams. It makes plenty of power. The cams made a big diffrance. I'm not sure how that will affect my mileage as yet however.
EDIT: Forgot to mention that some people wire on a computer fan to their DR-Z's. I would peobably consider doing that for a lot of desert racing, although they don't overheat easy.
Last edited by ekaphoto; 11 Feb 2007 at 04:31.