Pistons & Cylinders
The difference in measurement between the X and Y axis of the cylinder is called
Out of round
Name the three dimensions the dial caliper can measure
Inside, outside, and depth dimensions
One inch is equal to how many centimeters?
2.54cm
When did HD first start selling sidecars?
1914
What motorcycle company made the first off road motorcycle "dirt bike"?
BSA 1914 Scrambler The first "off road" races were held in the UK in 1909
Pistons are manufactured out of round for this purpose
Thermal expansion (the crown and piston pin boss expand the most)
Would shouldn't you store the 0-25mm and 0-1 inch micrometers fully closed?
Rust and Corrosion can build up between the spindle and anvil
8 5/8 inches written as a decimal
8.625 inches
On a single overhead camshaft (SOHC) the cam lobes generally face what direction when the engine is on TDCO.
Top Dead Center Overlap
10 and 2
True or False: If combustion chamber volume was decreased, compression ratio would increase and cylinder volume would be unchanged.
True
Increasing the size of the piston in the brake caliper does what to the clamping force on the brake disc?
Increases
Seven turns of the thimble on a standard micrometer equals
.175 inches
120 in/lbs is equal to how many ft/lbs
10 ft/lbs
True or False: In most two stroke engines the same oil lubricates the crank shaft and the transmission
False - the crankshaft is lubricated from the oil in the premix.
Piston skirt knock would indicate which two parts are worn out.
The cylinder and piston thrust surface
Why should piston ring end gaps never be aligned
Loss of compression, uneven cylinder heating, and oil control
What does the small dial on a dial indicator count?
The number of revolutions
A fish scale (spring scale) is used for measuring what on a motorcycle?
Steering bearing tension
Name 3 of the 5 ways to increase measured HP
Increase displacement, Increase RPM, Improve Improve combustion efficiency, fill cylinders better, reduce friction
Valve clearance that is too tight too measure could indicate that what may be happening to the valve
the valve is sinking into the cylinder head
How many CC's is a 3 cylinder motorcycle with a 1.5 inch bore and 1 inch stroke?
3.81 x 3.81 x 2.54 x ,7854 x 3 = 86.87cc's
Name the seven parts of micrometer
Sleeve, thimble, spindle, anvil, frame, lock,clutch
100 milliliters are equal to how many cubic centimeters?
100ml = 100cc
Name the two types of combustion engines designs?
Internal Combustion - burns fuel inside an engine (motorcycle engine)
External Combustion - burns fuel outside the engine (steam engine)
What does the "190" represent for a motorcycle tire size of: 190/60-ZR17MC
Tire width (in mm)