Welcome to the site. and good luck w/ the 200s
The second shaft is prob the gear indecator, it should have a white circle thing w/ a little pointer, if I remember my 200s. The gear problem could be alot of things, First I would check the chain / sprocket. Make sure everything it in good working order. 2nd check the shifter splines and make sure it is really changing a gear. From there you need to get into the motor and clutch adjustment, check the easy stuff and get back to us, I am sure you will get the help you are looking for.
GOOD LUCK
MIK6 / Mike
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