Clutch - Yamaha JT1 Series Service Manual

ENGINE-Crarkcase Cover, Clutch
2) Remove the seven pan head screws holding the
crankcase cover, and then remove the case
cover. ( The cover can be removed without
taking off the oil pump.)
Note: In this case, be sure to pull out the
Autolube pump banjo bolt before
cover removal.
3) Remove the crankcase cover gasket .Replace
it. if damaged.
Fig 3-8-2
B Installation Fig 3-8-3
Spread YAMAHA Bond No.5 over the mating sur-
face of the crankcase R Place the crankcase cover
gasket on the crankcase and apply Yamaha Bond
No.5 and install the crankcase cover
R.
Be sure
to apply YAMAHA Bond No.5 to the mating sur-
face : otherwise the crankcase will leak
Note : When ir 'alling the crankcase cover (R)
make ,re that the pump drive gear ( made
from sYnthetic resin) 1s correctly engaged
with the primary drive gear_ In addition,
make certain that all mating surfaces have
been thoroughly cleaned
3-9 Clutch
Fig 3-8-4
The clutch is of the wet disc type, consisting of two molded cork friction plates and one steel clutch plate.
It is installed on the transmission main shaft.
The clutch housing forms a one piece assembly with the primary driven gear of the onmarv reduction system.
This reduction gear is in mesh with the primary drive gear. The primary reduction ratio is 74/19 (3.894).
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