"Vespa ET4: Useful Information"
By Ron Stultz
27 Jun e 2015
Summary: an attempt to put some useful information all in one place.
Background:
2004 ET4 bought new in January 2004
Useful information:
Engine oil: 5W-40 Synthetic European
1 Liter/quart without filter change.
1 quart and 4 ounces with new filter.
Exhaust Allen Bolts: 6mm
Exhaust Allen Bolts: Long bolt goes at bottom.
Exhaust nuts: 10mm
Oil drain plug: 24mm
Spark plug: RG6YC
Gear oil: 75W90 Exactly 5 ounces.
Clock battery: 1.5Volts original Bolva 617 but Duracell 301/386 works
Side mirrors: rider left has 13mm nut, right side simply screws into frame.