Test #1 Study Flashcards
Air pump which increases intake pressure.
Supercharger
A 5-speed transmission normally has 2 shift forks. (True/False)
False
What’s the prupose of the shift mechanism?
Moves the shift forks.
All gears on one shaft mesh with all gears on other shaft all the time.
Constant Mesh
What property does API rate in motor oil?
Service duty or levels of protection.
CVT’s are commonly found on what:
ATV’s
UTV’s
Snowmobiles
Scooters
What’s the purpose of the shift fork?
Moves the slider gears.
Can handle radial loads as well as axial thrust loads in both directions.
Ball Bearings
Purpose and application of a dry lubricant.
Used on cables and levels where contaminate accumulation is a concern.
Can handle radial loads but can only take thrust loads in one direction.
Tapered Bearing
Two purposes of the intake manifold:
A.) Intake conduit which seals between the intake system and engine.
B.) Part of the tune length.
A fixed gear may be……… on to the shaft.
Machined Splined Pressed
An indirect drive will have all the driven gears on what shaft?
Crankshaft
Changes fuel valve to use more fuel in the tank.
“RES” function
What is the gear ratio in the top gear of a direct drive transmission?
1:1
Type of bearing that requires a layer of high-pressure oil between it and the roating surface and normally has a split design.
Precision Insert (Plain Bearing)
Radial Loads
Right angle to the shaft.
What can be used in the transmission instead of a slider gear?
CVT
Two methods of rating octane
(R) Research
(M) Motor
What is the purpose of a sliding gear?
Toyou dog lock into freewheeler
Name the three types of shift detents.
A.) Arm and Roller
B.) Spring and Plunger
C.) Spring and Ball
Three types of air filters:
A.) Paper
B.) Foam
C.) Gauze (Oiled Fabric)
Purpose of the oil filter bypass valve.
Allows oil to pass the filler to maintain lubrication needs in the engine.
Purpose of the oil pressure relief valve.
Maintains oil pressure at the same force it takes to open the valve.
Main advantage of oxygenated gasoline.
Reduse emissions
Basic rule to identify slider, fixed, and freewheeling gears
Sliders are the gears with channels for shifting fork. Opposite and next to each spider are the freewheelers. All others are fixed.
The maximum number of speed may be determined by multiplying the number of shift forks times 2:
True
Name the four pruposes of bearings:
A.) Reduce friction on moving parts.
B.) Support axial and/or radial loads on the shaft.
C.) Control End Play
D.) Provide Spacing
Manual override on the bike makes engine pump (prime) fuel.
“PRI” function
Name the three types of gears used in Motorcycle transmissions.
Fixed Free wheeler Slider
Opens when engines running but closes when it’s off.
Vacuum type petcock
Shift forks can be made of?
A.) Bronze
B.) Hard Chromed Steel
The “W” in multiviscosity oil means?
Winter Grade
What’s the purpose of the final drive?
Transmits power from the transmission to the rear wheel.
Air/Fuel ratio of 12:1 is ________ than stoichiometric?
Richer
Fuel Valve enables:
The fuel tank to be removed for servicing the bike.
Because of its ability to deal with extreme pressures, this is used in modern shaft drive rear ends….
Hyphoid Spec Oil
The carburetor must be jetted richer when what occurs?
Air Density increases
What does SAE rate?
Viscosity
Six purposes of lubricating oil.
A.) Reduce Friction
B.) Dampen Shock
C.) Protect parts from corrosion
D.) Sealing
E.) Cooling
F.) Cleaning
Name the two stages of the dry sump oil pump.
A.) Feed Pump
B.) Scavenge
What are the two functions of a shift detent?
A.) Helps transmission go in to gear
B.) Helps transmission stay in to gear
Three attributes of a bushing?
A.) Capable of high loads.
B.) Uses grease on chassis application.
C.) Requiress constant lubcrication when used on transmission and engine applications.
Multi-layer design with soft metals to absorb small particles.
Embedability
Two Types of Shift Mechanisms.
A.) Drum
B.) Cam Plate
What mus be done to the fuel tank because of Boyle’s Law.
Must be vented.
What are the three purposes of the motorcycle transmission?
Change speed of Motorcycle at a given RPM. Change mechanical advantage Keep engine rom within usable powerband
How do you identify an “M1” in and indirect-drive transmission?
Smallest gear on mainshaft
Name and describe the six engine oil additives.
A.) Viscosity Modifiers-bridges gap between multigrade oils and determines reaction to changes in temperature, pressure, or speed.
B.) Anti-Foam
C.) Friction Modifiers-coats sliding surfaces to reduce friction.
D.) Detergents-helps reduce deposits.
E.) Antioxidant-helps keeps rings free and combustion chamber cleared.
F.) Shock & Sheer Protectants-creates a cushion for parts.
Physical property of lube and indication of oil flowability at a certan temperature.
Viscosity
Purpose of using grease?
Designed to lubricate in an are where a liquid lubricant may splatter.
Why is higher Air/Fuel micture needed for cold start?
Cold engine offers less opportunity to vaporize fuel.
Uses controlled lab engines to rate.
Octance rating system
Theoretical perfect combustion ratio of air/fuel in gasoline. (Stoichiometric)
14.7:1
Largest gear on the countershaf of most transmissions is….
C1
State that requires te fuel tank to be vented in to a charcoal canister:
California
What are the protrusions on the side of the gears called?
Slots or dog locks
Fuels resistance to detonation
Octane
Two reasons why a motorcycle may have a fuel pump:
A.) Tank too low to provide adequate pressure to the carburetors.
B.) Part of a Fuel Injection System
Air/Fuel ratio of 16:1 is ____ than stoichiometric?
Leaner
Differences in wet and dry sump lubrication systems.
Wet sump oil is stored at crankcase bottom
Dry sump stores oil externally from the engine
What are the three types of shift linkages?
A.) Claw, Hook, and Pin
B.) Floating PLate
C.) Ratchet
Name and define two basic types of transmissions used in motorcycles.
Indirect Drive: power flow enters one axis, leaves on other. Direct drive: power flow enters/leaves same axis.
Five types of rolling element bearings.
A.) Ball Bearing
B.) Needle Bearings
C.) Roller Bearings
D.)Tapered Bearings
E.) Thrust Bearings
Three Types of Fuel Pumps:
A.) Mechanical
B.) Electrical
C.) Vacuum
Axial Thrust Loads
Along the shaft.
Cruising speeds Air/Fuel mixture _______ and why?
13-14:1
Small throlle opening combined with moderate RPM results in good intake and fuel usage.
Four fuel valve types:
A.) Manual
B.) Vacuum
C.) Electrical
D.) Vacuum W/ Electrical Assistance
Two attributes of shims:
A.) Control Axial Load.
B.) Controls end play and provides spacing.
The types of damages we should look for when inspecting shift forks.
A.) Burnt
B.) Bent
C.) Broken
Three types of Oil Filters
A.) Internal
B.) External Screw On
C.) Centrifugal
Three types of final drives used on motorcycles
A.) Chain
B.) Belt
C.) Shaft
Three most common oxygenates used in oxygenated fuels.
A.) Ethanol
B.) Methanol
C.) MTBE
Idle requires an Air/Fuel mixture of _____ and why?
12-14:1
Low intake speed a udle results in reduced atomization.
