Maintenance

Super easy way to replace the drive belt on your scooter. This method will work on 50cc-150cc GY6 engines. On a bigger or a different type of engine there is no guarantee.

Vento Phantom R4i Repair Manual— GY6 150cc Engine PDF

Vento Triton  R4 Repair Manual — Engine type 1PE40QMB Minarelli Jog PDF

Being able to "read" a spark plug can be a valuable tuning aid. By examining the insulator firing nose color, an experienced engine tuner can determine a great deal about the engine's overall operating condition.

In general, a light tan/gray color tells you that the spark plug is operating at optimum temperature and that the engine is in good condition. Dark coloring, such as heavy black wet or dry deposits can indicate an overly-rich condition, too cold a heat range spark plug, a possible vacuum leak, low compression, overly retarded timing or too large a plug gap.

If the deposits are wet, it can be an indication of a breached head gasket, poor oil control from ring or valvetrain problems or an extremely rich condition - depending on the nature of the liquid present at the firing tip.

At this time there are a few brands of Spark Plugs being manufactured in China. These Spark Plugs are more commonly found in Chinese engine applications and are not always readily available in other countries for aftermarket purchase.

In determining an NGK cross reference, we have found that the "Torch" and "NHSP LD" provide a good starting point. Torch and NHSP LD have a similar part numbering system which is also used across other Chinese brands.

For cross referencing purposes please consult the Cross Reference Chart.

CONTENT PREVIEW

1. REGULAR INSPECTION
1-1 Delivery Introduction  ----------------------------------------------------3
1-2 Inspection Before Running   --------------------------------------------4
1-3 Regular Inspection  -------------------------------------------------------5
1-4 General Inspection  -------------------------------------------------------6
1-5 Notes for Inspection  -----------------------------------------------------6