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Yamaha YZF-R7 User Manual

Yamaha YZF-R7
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4 - 68
ENG
CONNECTING RODS AND PISTONS
4. Calculate:
• piston pin-to-piston pin bore clearance
Out of specification → Replace the pis-
ton pin.
Piston pin-to-piston pin bore clearance =
Piston pin bore diameter (in the
piston) –
Piston pin outside diameter
Piston pin-to-piston pin bore
clearance
0.004 ~ 0.020 mm
(0.00016 ~ 0.00079 in)
<Limit>: 0.070 mm (0.0028 in)
CHECKING THE BIG END BEARINGS
1. Measure:
• crankshaft pin-to-big end bearing
clearance
Out of specification → Replace the big
end bearings.
â–¼ â–¼ â–¼ â–¼ â–¼ â–¼ â–¼ â–¼ â–¼ â–¼ â–¼ â–¼ â–¼ â–¼ â–¼ â–¼ â–¼ â–¼ â–¼ â–¼ â–¼ â–¼ â–¼ â–¼ â–¼ â–¼ â–¼
The following procedure applies to all of
the connecting rods.
ACHTUNG:
CAUTION:
Do not interchange the big end bearings
and connecting rods. To obtain the cor-
rect crankshaft pin-to-big end bearing
clearance and prevent engine damage,
the big end bearings must be installed
in their original positions.
a. Clean the big end bearings, crank-
shaft pins, and bearing portions of
the connecting rods.
b. Install the big end upper bearing into
the connecting rod and the big end
lower bearing into the connecting rod
cap.
NOTE:
Align the projections a on the big end
bearings with the notches b in the con-
necting rod and connecting rod cap.
Crankshaft pin-to-big end
bearing clearance
0.058 ~ 0.078 mm
(0.0023 ~ 0.0031 in)

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Yamaha YZF-R7 Specifications

General IconGeneral
Bore x Stroke80.0mm x 68.6mm
Compression Ratio11.5:1
Fuel DeliveryFuel injection
Final DriveChain
Front BrakesDual 298mm hydraulic disc; ABS
Rear Brakes245mm hydraulic disc; ABS
Front Tire120/70ZR17
Rear Tire180/55ZR17
Wheelbase54.9 in
Seat Height32.9 in
Fuel Capacity3.4 gal
Wet Weight414 lb
Ground Clearance5.3 in
Engine TypeLiquid-cooled, 4-stroke, DOHC, 4-valves
Transmission6-speed
Front Suspension41mm KYB inverted fork, adjustable preload, rebound and compression damping; 5.1-in travel
Rear SuspensionSingle shock, adjustable preload and rebound damping; 5.1-in travel

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