Here's a thread on adding a kickstart:
The 98 and 99 street models have the same suspension components as the dirt models.
I have a 98SE which I'm real happy with as a practical one bike solution for transportation and good trail performance. It's at its best in eastern style, tight, gnarly type of trails. Seriously needs stronger springs in the front, and a revalve in the rear for more than casual speeds offroad. Frame flex will limit it if you want to do high speed riding in more open areas.
I'm real happy having the e-start - worth the extra weight for me.
I've just been stripping off all the street crud that I don't really need.