Your 200 has kick start shaft??
Many of the splines all swap, but the way a kicker pivots and how long it is can change what it will fit. The easiest way to check splines is to use a metric wrench. Some a 17MM fits on and others a 19MM fits on..............
If you have a pullstart, then I can't see a kickstarter in your future 
BEAST:
200X forks slide right into an SX but now you have to deal with spacers to center the wheel (and it won't center) to make the caliper work...
Swap the whole front end to a 200X 83-87 and make the necessary steering stops.
All our government does is distract us while they steal from us, misspend our tax $ and ruin our country