Should be regular 2 stroke oil
No. As Kawasaki completely redesigned the kdx in 1989, and then once more in 1995.
No, it is a 2 stroke.
1987-1988 is the only years i know that will interchange. i have a 1988 KDX 200 with a 1985 model engine and it runs just fine. I do have a 1988 engine for parts if you need something
no
650mls
Such service intervals depend on the maintainance performed on the bike, and how regularly. The top end should be at least inspected at 100 hours riding time, and then re-built at a max of 200 hours riding time.
4 miles and hour
Yes, both years use a Mikuni VM32SS carb. Everything is identical with the exception of a larger main jet in the 84.
Most 200 cc dirt bikes (2 and 4 strokes) with stock gearing will run from low to mid 60's. I have a 01 KDX 220 and run woods gearing of 13/48 and top speed is 67 mph.
700 cc or .74 qt
i run 40:1 in mine, i have the same bike