The frame is the best ground source on nearly all vehicles (assuming it uses a negative ground system, which is the most common type-negative post of battery is attached to the frame). If the frame can't be used, a metal part attached to the frame *may* be substituted, but always make sure to clean the attachment point to BARE metal, as paint or powder coating can act as an insulator, preventing a good ground connection.
A quad is a triple combination pumper with the addition of 200' of ground ladders
Yes
Suitable by design no, but the engine has plenty of power and the seat will fit two people comfortably. Ride Safe!
ATV tires and a specific type of tyre. For Quad Bikes mainly. If the internet option is not suitable, I'd suggest visiting your nearest quad bike seller.
Rangeland
YES
The timing is ground in the crankshaft and not adjustable.
rain and flooding
quadranglequadruple
There are a number of very good ATVs suitable for a youth. Some good models one could purchase include '2012 Polaris Outlaw 90', '2011 Pitster Pro FXR 15R' and the 'Mini Motocross Quad'.
AWG 12/2 with ground.
Quad is four.