Jet needle improves acceleration.

Hello am new to the kz rider family if you will. I bought a 80' kz 750h1 ltd for $1 a cc, it was from a buddy who finally sold to me after 8 years of cmon let me take it off your hands. I got a jet kit from Sigma 6 that I am installing now, it had 4 to 1 Vance and hines and uni pods and it ran decent but didn't idle well before I took it apart. I put br8 plugs in, put plate over reeds and the jet kit. I am still in process putting back together hopefully in next week I will have it running. I plan on bringing it in for the valve clearance check and also carb sync. 

Also was wondering where the damper goes for the center stand so the chain don't rub on it. I took it off so long ago when I decided to paint frame. Thanks