Yamaha XT660R S Service Manual

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ENG
TRANSMISSION
INSTALLING THE TRANSMISSION
1. Install:
• shift fork “L” 1 (to drive axle)
• shift fork “C” 2 (to main axle)
• shift fork “R” 3 (to drive axle)
• shift drum 4
• transmission assembly
NOTE:
_
• The embossed marks on the shift forks
should face towards the right side of the
engine and be in the following sequence:
“R”, “C”, and “L”.
• Make sure that the shift fork cam follower is
properly seated in the shift drum groove.
3
1
4
2
2. Check:
• shift operation
Unsmooth operation → Repair.
NOTE:
_
• Apply engine oil to each gear and bearing
thoroughly.
• Before assembling the crankcase, make
sure that the transmission is in neutral and
that the gears turn freely.

Yamaha XT660R S Specifications

General

Displacement	660 cc
Bore x Stroke	100.0 mm x 84.0 mm
Compression Ratio	10.0:1
Fuel System	Fuel Injection
Ignition System	TCI
Starter System	Electric
Transmission System	5-speed
Final Drive	Chain
Front Suspension System	Telescopic forks
Front Tyre	90/90-21 M/C 54S
Rear Tyre	130/80-17 M/C 65S
Overall Width	865 mm
Overall Height	1, 230 mm
Seat Height	865 mm
Wheelbase	1, 505 mm
Wet Weight	181 kg
Fuel Tank Capacity	15 litres
Oil Tank Capacity	2.9 litres
Engine Type	Liquid-cooled, 4-stroke, single cylinder, SOHC
Maximum Power	48hp (35kW) @ 6, 000rpm
Frame	Steel diamond
Rear Suspension System	Swingarm, (link suspension)
Front Brake	Single 298mm disc, 2-piston caliper
Rear Brake	Single Disc, 245 mm