On Yamaha motorcycles the VIN appears on the right side of the steering coloumn. On your 1983 Yamahopper QT50, it will be 17 digits long. The first number tells you where it was made, 1 and 4 is America, 3 is Canada.
No.Oversize pistons are ment to be used with enlarged cylinders.
In most cases you should not mix oil into the gas of your 1979 Yamaha 50 cc moped. This type of moped had its own oil reservoir. If it is not marked on the gas You do not need to oil with the gas.
you will use 300cc. This is the same as 10oz.
30 mph stock...40 if you change the exhaust and bore it out
That is 5,000 cc
2,750 cc
250
1 gallon = 3785.41 cc
473.176473 cc American568.26125 cc UK
3 CC = HOW MANY MG
2,750 cc