Yamaha YZF-R1 2020 Service Manual page 140

be blown out, which could cause serious in-
jury. When the engine has cooled, open the
radiator cap as follows:
Place a thick rag or a towel over the radiator
cap and slowly turn the radiator cap counter-
clockwise toward the detent to allow any re-
sidual pressure to escape. When the hissing
sound has stopped, press down on the radi-
ator cap and turn it counterclockwise to re-
move.
2. Remove:
• Water pump drain bolt "1"
• Copper washer "2"
3. Drain:
• Coolant
(from the engine and radiator)
4. Install:
• Water pump drain bolt
• Copper washer
New
Water pump drain bolt
10 N·m (1.0 kgf·m, 7.4 lb·ft)
5. Remove:
• Coolant reservoir cap "1"
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PERIODIC MAINTENANCE
6. Remove:
• Coolant reservoir bolt "1"
• Coolant reservoir "2"
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7. Drain:
• Coolant
(from the coolant reservoir)
8. Install:
• Coolant reservoir
• Coolant reservoir bolt
Coolant reservoir bolt
7 N·m (0.7 kgf·m, 5.2 lb·ft)
9. Fill:
• Cooling system
(with the specified amount of the recom-
mended coolant)
Recommended antifreeze
High-quality ethylene glycol anti-
freeze containing corrosion
inhibitors for aluminum engines
Mixing ratio
1 : 1 (antifreeze : water)
Coolant quantity
Radiator (including all routes)
2.25 L (2.38 US qt, 1.98 Imp.qt)
Coolant reservoir (up to the maxi-
mum level mark)
0.25 L (0.26 US qt, 0.22 Imp.qt)
Handling notes for coolant
Coolant is potentially harmful and should be
handled with special care.
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