Im getting a 96 mxz670 and its got rave valves and a rave link what does that mean and whats the best way they should be taken care of.

it's just exhuast valves that are spring loaded that give you more torque. They should be cleaned every 2000 miles. they aren't hard to take apart, just be careful with the gasket. make sure to put them in the right way (the valves will say top to help indicate this) .

Rotax Adjustable Variable Exhaust

oh yeah dash is right too