yes,you do need a tool to adjust that shok of your bike,that tool should be include when you buy your motocycle,and the fork problem is depend on what bike you ride~
uninstall your cam cover,there are 3 bolts on it,then you can release the right cover,there you go ,release the 3 bolts.take off the little sprokets,then push that cam from the left side to the right!!! ok all done~
that engine in china,we install that on the farm machine,so the wiring you have seen is the gear box `s direction light ,in that bike you won`t need that !