Meh. Normal. Engine size won't affect the frame as far as jumping and landing , speed will. Unless you're racing , where every little bit counts , a little wiggle when she walks is fun! Make sure you check the
bottom of the ceramic when reading plugs. The top will tell you nothing unless it's really bad. Unleaded gas has made reading plugs almost useless anyway. With unleaded all I look at is the line on the ground electrode to check the timing , anyway.
Unless you bump up the compression , the stock heat range is your best bet. If you want to tune it up , pull the top end and gasket match the transfer ports in the case and the cylinder , raise the exhaust port .47 mm and put an FMF pipe on it.