60 Tiger Cub Motorcycle

FRS 106, Michael Littman – Spring 2019

Week 1: Tuesday Scribe Notes

General Notes-

  • Groups:

Top End – head, intake/exhaust valves, cylinders, carburetor, exhaust

Bottom End – clutch, transmission, oil

Electrical – wiring, points, coils, timing

Wheels – brakes, rims, spokes, hubs

Frame – fork, swing arm, seat mudguards, tanks

Detailing – Painting, Fasteners

  • Probably will be using Fusion 360 program

Reading Discussion-

  • Compression ratio (7:1 9:1) ratio of volume of cylinder and combustion chamber from when the piston is at the bottom to when it is at the top. Relates to engine power.
  • Square engine (like ours with dimensions 63mmx64mm).
  • Engines are 33% efficient with a third of energy lost in the exhaust and a third lost through excess heat.
  • Dry sump sucks oil out so the fly wheel doesn’t rotate in oil.
  • OHV (over head valves)
  • Clutch (ours is a friction clutch that uses a collection of plates).
  • Our bike has no battery – alternator directly creates the spark).

Author: Ben Johnston

Ben Johnston is Senior Educational Technologist in the McGraw Center for Teaching and Learning, a unit of the Office of the Dean of the College, Princeton University.