Motorcycle/Small Engine NC II study plan

State the personal protective equipment required for each of six named servicing tasks (draining fuel, grinding valves, charging batteries, welding, lifting an engine, handling coolant) and justify each item from the hazard it controls.

Demonstrate the safe handling, storage, and disposal sequence for used engine oil, drained fuel, spent solvent, and lead-acid batteries, citing the segregation and labeling rules applied in your own shop.

Identify and explain the function of at least twelve hand tools used in motorcycle and small engine work, and demonstrate the correct size selection and torque-safe use of sockets, wrenches, and torque wrenches.

Read a vernier caliper, micrometer, and dial gauge to the correct resolution and record three measurements each on a practice workpiece, showing the calculation for least count.

Set up and use a torque wrench correctly, including unit conversion between N·m and kgf·m, and explain why a torque wrench is returned to its lowest setting after use.

Build a periodic maintenance schedule for a named motorcycle model covering the first 1,000 km service and the 4,000/8,000 km intervals, listing each inspection item, the specification, and the pass/fail criterion.

Perform and document a full pre-ride and periodic inspection sequence: engine oil level and condition, air filter, spark plug gap and color, valve clearance check point, chain slack and lubrication, brake pad thickness, tire pressure and tread depth, and battery terminal condition.

Explain the four-stroke operating cycle and use it to reason why valve clearance, cam timing, and compression each affect starting and idle quality.

Apply a structured diagnostic sequence (verify the complaint, confirm with a symptom check, isolate by system, test the component, confirm the repair) to a no-start scenario, writing the decision steps in order.

Distinguish rich, lean, and ignition-timing symptoms from spark plug reading and exhaust behavior, and state the first test to run for each.

Measure cylinder bore with a bore gauge or inside micrometer at three heights and two planes, compute taper and out-of-round, and compare against the service limit to decide hone or rebore.

Measure piston-to-cylinder clearance, ring end gap in the bore, and ring side clearance in the groove, then state whether the top end is serviceable.

Remove, inspect, and assess a cylinder head: check for warpage with a straightedge and feeler gauge, inspect valve seats and stems for wear, and decide grind, replace, or reuse.

Test compression (dry and wet) and perform a cylinder leak-down test, then interpret the results to separate ring, valve, and head gasket leakage.

Explain crankshaft and connecting rod inspection points - journal wear, out-of-round, rod side play, and bearing clearance - and describe how each is measured.

Disassemble, clean, inspect, and reassemble a valve train, setting valve clearance to specification on a cold engine and verifying the setting after two rotations of the crankshaft.

Time an engine correctly: align camshaft and crankshaft marks, verify TDC on the compression stroke, and describe the damage caused by incorrect timing.

Service a carburetor: disassemble, clean jets and passages, check float height against specification, set the idle mixture, and explain the function of the pilot, main, and needle circuits.

Diagnose a fuel delivery fault by testing tank flow, filter restriction, float level, and fuel quality in sequence, and record the evidence at each step.

Inspect an exhaust system for restriction and leakage, and explain how a blocked muffler or leaking header gasket changes mixture and engine behavior.

Test a battery under load, measure charging voltage and current, and diagnose a no-charge condition across the stator, regulator/rectifier, and wiring in a logical order.

Trace and test an ignition circuit from pickup or points through CDI or coil to spark plug, using a multimeter and spark tester, and state the expected reading at each test point.

Measure coil primary and secondary resistance, stator coil resistance, and pickup gap, and compare each to specification.

Diagnose a lighting or starting fault using a wiring diagram, including continuity, voltage drop, and ground integrity tests, and document where the open or high-resistance fault was found.

Explain the safety rules for handling fuel and batteries during electrical and fuel system work, including spark avoidance and ventilation.

Inspect and adjust a clutch: measure friction plate thickness, spring free length, and cable free play, and state the wear limits used.

Service a chain and sprocket final drive: measure chain slack and stretch over a set number of links, inspect sprocket tooth wear, and decide adjust, replace, or reuse.

Explain the operation of a constant-mesh transmission and identify the function of shift forks, shift drum, and detent mechanism, then describe the symptom of a bent shift fork.

Diagnose a slipping clutch, a dragging clutch, and a jumping-out-of-gear fault by listing the probable causes in order of likelihood and the test that confirms each.

Perform a fluid service on a transmission or final drive (gear oil or belt drive as applicable) to the correct level and specification, and record the quantity used.

Write a service report for a completed job that includes the customer complaint, the diagnosis, the work performed, parts used with part numbers, measured values, and the technician's signature.

Prepare a cost estimate for a named repair, separating parts, consumables, and labor hours, computing the total with a stated labor rate, and explaining how you would present an estimate revision to a customer.

Explain the handling of a customer complaint you cannot immediately resolve, including what you say, what you record, and when you escalate.

Describe three situations in a shop that raise an ethical conflict (for example, upselling unneeded work, hiding a mistake, or misrepresenting a used part) and state the correct action in each.

Explain why service records matter for warranty claims, repeat repairs, and resale value, and describe how you would keep records traceable to a specific machine and date.

Work through five timed mixed-fault scenarios covering engine mechanical, fuel, ignition, and driveline faults, writing the diagnostic path and the confirming test for each.

Re-test your weak areas identified in weeks 3 to 6 by re-measuring one cylinder, one valve clearance, and one electrical circuit and comparing results against the earlier records.

Explain the correct sequence for a complete engine teardown and rebuild, including labeling, cleaning, measurement, and torque and tightening-order requirements.

State the safety and environmental controls that apply across all domains, and check your week 1 checklist against what you actually did in weeks 2 to 7, updating it where practice differed.

Prepare a one-page personal readiness summary listing the domains you can perform unsupervised and those needing more practice.