Hi,
A friend recently gave me a quad, and it ran good until the day I picked it up where now it doesn't start. I have no clue about quads. But I intend to learn and I want to start now.

All I need is for one of you kind people to identify the parts of the quad, then I may be able to use my general maecanic stills to troubleshoot the problem/symptoms.






















Notes:
Starter is good. Motor turns. No spark at the spark plug. We don't know what the make and model is and have no wiring diagram to follow. All fairings removed, spark plug out, rear suspension out.

#1 ?
#2 ?
#3 ?
#4 ?
#5 ?
#6 ?
#7 ?

Thanks !