Chapter 3 Engine; Engine Remova1 - Yamaha JT1 Series Service Manual

ENGINE-Engine Removal
CHAPTER 3 ENGINE
This chapter c;lescribes the disassembly and reassembly of the engine, its removal from the chassls, and the necessary
service data. However, except when overhauling the crankshaft assembly, transmission, shifter mechanism or bearings
and oil seals in the crankcase, it is suggested that engine be serviced without removing it
from the chassis. This
will
save a lot of time and labor.
Preparation for disassembly of the engine :
1) All dirt. mud, dust. and foreign material should be thoroughly removed from the exterior of the engine assembly
before removal and disassembly. This will prevent any harmful foreign material from entering the interior of the
engine assembly.
2) Before engine removal and disassembly, be sure you have proper tools and cleaning equipment so you can per-
form a clean and ·efficient job.
3) During disassembly of the engine .. clean all parts and place them in trays in order of disassembly. This will make
assembly time faster and easier, and insure correct installation of all engine parts.
3 -1 Engine Removal
Start the engine and warm it up for a few .minutes,
then turn off the engine and drain the transmission
oil
(Volume of o;I 800-850 cc 10.85 US qt)
YAMALUBE 4-CYCLE
or
SAE lOW-30 "SE"
2 Pull out the seat fitting pin and remove the seat
by pulling
it backward.
-11-
Fig 3-1-1
Fig
3-1-2