[Kevan]

Formula Juniors returns sounds about right, they're awful quality 

That NSR tyre has a mold sprue that just needs nipping off...or grinding off on a sheet of sandpaper with the wheels mounted on the rear axle as a basic basic tyre sander.
...notice I didn't say tyre truer as you can't properly true a tyre unless the axle is rigidly held in place which your hand can't do.