Yamaha RS90PB Owner's Manual page 120

Periodic maintenance and adjustment
1. Oil tank breather hose clamp
2. Oil tank breather hose
6. Slide the crankcase breather hose clamp
(crankcase side) up, and then disconnect
the crankcase breather hose from the en-
gine.
1. Crankcase breather hose clamp (crankcase
side)
2. Crankcase breather hose
7. Lift up the air filter case, slide the crank-
case breather hose clamp (air filter case
side) down, disconnect the crankcase
breather hose from the air filter case, and
then remove the air filter case.
114
1. Crankcase breather hose clamp (air filter
case side)
8. Disconnect the negative battery lead.
9. Replace the blown fuse with one of the
proper amperage.
1. Main fuse
2. Spare main fuse