1-7
GEN
INFO
SPECIAL TOOLS
Tool No.Tool name / Usage Illustration
90890-04086All-purpose clutch holder
This tool is used to lock the clutch, when the
clutch boss lock nut is being loosened or
tightened.
90890-01135Crankcase separating tool
This tool is necessary to disassemble the
crankcase.
90890-01274Crankshaft installation hose
This tool is used to install the crankshaft.
90890-01275Crankshaft installation bolt
This tool is used to install the crankshaft.
90890-04059#10 (M14) adapter
This tool is used to install the crankshaft.
90890-04081Crank spacer
This tool is used to install the crankshaft.
90890-85505SEALANT (QUICK GASKET) ®
Yamaha Bond No. 1215 ®
This sealant (adhesive) is used for crankcase
mating surfaces etc.
90890-01268Ringnut wrench
This tool is used to loosen and tighten the
steering ringnut.
90890-01348Ringnut wrench
This tool is used to loosen and tighten the
steering ringnut.
ProCarManuals.com
SPECGENERAL SPECIFICATIONS
2-2
Item Standard Limit
Spark plug
Manufacturer/model NGK/DPR8EA-9 or NGK/DPR9EA-9
Gap 0.8–0.9 mm •••
Clutch typeWet. Multiple-disc
Transmission
Primary reduction system Spur gear
Primary reduction ratio 71/34 (2.088)
Secondary reduction system Chain drive
Secondary reduction ratio 47/15 (3.133)
Number of drive chain sprocket
teeth (front/rear) 15/47
Transmission type Constant mesh 5-speed
Operation Left foot
Gear ratio 1
st2.583
2nd1.588
3rd1.200
4th0.955
5th0.792
Chassis
Frame type Open cradle backbone frame/detachable
rear frame
Caster angle 27° •••
Trail 117 mm •••
Tires
Front:
Type With tube
Size 90/90-21-(54R) / 90/90-21-(54S)
Manufacturer/model Pirelli / MT70 - Michelin / T63
Rear:
Type With tube
Size 130/80-18-(66R) / 130/80-18-(66S)
Manufacturer/model Pirelli / MT70 - Michelin / T63
Maximum load* 180 kg •••
Tire air pressure
(measured on cold tires):
Up to 90 kg* Front 200 kPa; 2.00 kgf/cm
2; 2.00 bar •••
Rear 220 kPa; 2.20 kgf/cm2; 2.20 bar •••
90 kg–maximum* Front 210 kPa; 2.10 kgf/cm2; 2.10 bar •••
Rear 240 kPa; 2.40 kgf/cm2; 2.40 bar •••
Off-road riding Front 150 kPa; 1.50 kgf/cm2; 1.50 bar •••
Rear 160 kPa; 1.60 kgf/cm2; 1.60 bar •••
High-speed riding Front 210 kPa; 2.10 kgf/cm2; 2.10 bar •••
Rear 240 kPa; 2.40 kgf/cm2; 2.40 bar •••
* Total weight of rider, passenger,
cargo and accessories
Wheels
Front:
Type Spoke wheel
Size 21” x 1.85
Rear:
Type Spoke wheel
Size 18” x MT 2.50
ProCarManuals.com
SPECMAINTENANCE SPECIFICATIONS
2-8
Item Standard Limit
Ballancer
Ballancer drive method Gear
Clutch
Clutch release method Inner push, cam push
Friction plate thickness 2.72 - 2.88 mm •••
Wear limit ••• 2.60 mm
Plate quantity 6 pcs
Friction plate thickness 2.94 - 3.06 mm •••
Wear limit ••• 2.8 mm
Plate quantity 2 pcs
Clutch plate thickness 1.20 mm •••
Plate quantity 7 pcs
Max. warpage ••• 0.20 mm
Clutch spring free length 42.8 mm •••
Plate quantity 5 pcs
Clutch housing thrust clearance 0.070 - 0.071 mm •••
Transmission
Max. main axle runout ••• 0.08 mm
Max. drive axle runout ••• 0.08 mm
Shift mechanism type Cam drum and guide bar
Carburetor
ID mark 5CH5 10
Main jet #1:#150 #2:#145
Main air jet #1:1.0 #2:0.9
Jet needle #1:5C5A-3/5 #2:5Y18-3/5
Needle jet 2.600
Cutaway 4.00
Pilot air jet 1 # 0.8 mm
Pilot jet # 50
Bypass 1 # 1.0
Pilot screw turns out 2-3/4 +/- 1/2
Valve seat size 2.5
Starter jet 1 # 74
Float height 6.0 - 8.0 mm •••
Engine idle speed1,150-1,450 r/min •••
CO% 1.5 - 3 •••
Intake vacuum 30.6-33.36 kPa - 230-250 mm Hg •••
Lubrication systemDry sump
Oil filter type Paper type
Oil pump:
Oil pump type Trochoid type
Inner rotor to outer rotor tip clearance 0.12 mm 0.20 mm
Outer rotor to pump housing
clearance 0.030 - 0.080 mm 0.150 mm
Bypass valve opening pressure 80.0 - 120.0 kPa (0.8 - 1.2 kgf/cm
2) •••
Relief valve operating pressure 80.0 - 120.0 kPa (0.8 - 1.2 kgf/cm2) •••
Oil pressure (hot) 13.0 kPa (0.13 kgf/cm2)/1,300 r/min •••
Pressure check location Oil filter chamber •••
ProCarManuals.com
SPECMAINTENANCE SPECIFICATIONS
2-10
Tightening
Part torque
Part to be tightened
nameThread size Remarks
Nm mkg
Cylinder head Washer
based bol M8 x 1.25 29 2.9
Cylinder head Stud bolt M10 x 1.25 20 2.0
Cylinder head Hexagon socket
head screw M6 x 1.0 10 1.0
Cylinder head Stud bolt M6 x 1.0 7 0.7
Cylinder head:
Cap (oil check) Union bolt M6 x 1.0 7 0.7
Spark plug – M12 x 1.25 18 1.8
Cylinder head cover Hexagon socket
head screw M6 x 1.0 10 1.0
Tappet cover (intake) Hexagon socket
head screw M6 x 1.0 10 1.0
Tappet cover (exhaust) – M32 x 1.5 12 1.2
Cylinder Crown nut M8 x 1.25 22 2.2
Cylinder Nut M10 x 1.25 42 4.2
Cylinder Hexagon socket
head screw M6 x 1.0 10 1.0
Weight drive gear Hexagon nut M16 x 1.0 60 6.0
Rotor (A.C. magneto) Hexagon nut M14 x 1.5 120 12.0
Lock nut (valve adjusting screw) Hexagon nut M6 x 1.0 14 1.4
Cam chain sprocket Washer based
bolt M7 x 1.0 20 2.0
Cam chain stopper guide Hexagon socket
head screw M6 x 1.0 10 1.0
Cam chain stopper guide Washer based
screw M16 x 1.0 20 2.0
Rocker shaft Hexagon socket
head screw M6 x 1.0 10 1.0
Oil pump Hexagon socket
head screw M6 x 1.0 10 1.0
Oil delivery/retrieval pipe Pan screw M6 x 1.0 7 0.7
Oil draining pipe Washer based
screw M14 x 1.5 30 3.0
Oil filter cover Hexagon socket
head screw M6 x 1.0 10 1.0
Bleed screw (oil filter cover) Hexagon screw M5 x 0.8 5 0.5
Push lever (clutch) Pan screw M8 x 1.0 12 1.2
Push rod (clutch) Hexagon nut M6 x 1.0 8 0.8
Sprocket Hexagon nut M18 x 1.0 115 11.5
Lock washer (oil seal) Hexagon screw M6 x 1.0 10 1.0
Stop lever Bolt M6 x 1.0 10 1.0
Shift cam Hexagon screw M6 x 1.0 10 1.0
Stator Pan head (+)
screw M5 x 0.8 5 0.5
Tightening torques
ProCarManuals.com
SPECMAINTENANCE SPECIFICATIONS
2-11
Tightening
Part torque
Part to be tightened
nameThread size Remarks
Nm mkg
Stator (pick-up coil) Hexagon socket
head screw M6 x 1.0 7 0.7
Engine oil pipe 1 Hexagon socket
head screw M6 x 1.0 10 1.0
Engine oil pipe 2 Union screw M12 x 1.25 35 3.5
Oil delivery pipe Union bolt M8 x 1.25 18 1.8
Carburetor joints Hexagon socket
head screw M6 x 1.0 10 1.0
Air filter case (frame) Hexagon screw M6 x 1.0 10 1.0
Air filter case (frame) Washer based
screw M6 x 1.0 10 1.0
Exhaust pipe Washer based
nut M6 x 1.0 10 1.0
Exhaust pipe protector Pan head (+)
screw M6 x 1.0 7 0.7
Muffler Hexagon socket
head screw M8 x 1.25 23 2.3
Muffler (band) Nut, nylon M8 x 1.25 23 2.3
Muffler Washer based
screw M8 x 1.25 23 2.3
Crankcase Hexagon socket
head screw M6 x 1.0 10 1.0
Crankcase Stud bolt M10 x 1.25 20 2.0
Crankcase cover (right) Hexagon socket
head screw M6 x 1.0 10 1.0
Crankcase cover (left) Hexagon socket
head screw M6 x 1.0 10 1.0
Sprocket cover Hexagon socket
head screw M6 x 1.0 10 1.0
Stop washer (bearing) Flat headscrew M6 x 1.0 7 0.7
Pressure plate Washer based
screw M6 x 1.0 8 0.8
Clutch housing Hexagon nut M20 x 1.0 90 9.0
Primary drive gear Hexagon nut M20 x 1.0 120 12.0
ProCarManuals.com
SPECMAINTENANCE SPECIFICATIONS
2-13
Item Standard Limit
Drive chain
Type/manufacturer 520 135ORSB / Regina Chain
Link quantity 114
Drive chain slack 30.0 - 40.0 mm •••
Front disc brake
Disc outside diameter x thickness 267 x 4 mm •••
Max. deflection ••• 0.15 mm
Brake pad lining thickness-inner 7.5 mm * 3.7 mm
Brake pad lining thickness-outer 7.5 mm * 3.7 mm
Master cylinder inside diameter 13 mm
Caliper cylinder inside diameter 28 mm x 2
Recommended fluid DOT 4
Rear disc brake
Disc outside diameter x thickness 220.0 x 5.0 mm •••
Max. deflection ••• 0.15 mm
Brake pad lining thickness-inner 9.0 mm * 4.5 mm
Brake pad lining thickness-outer 9.0 mm * 4.5 mm
Master cylinder inside diameter 12.7 mm
Caliper cylinder inside diameter 34 mm
Recommended fluid DOT 4
Front brake leverAdjustable
Brake pedal lever
Brake pedal position 10 mm (below the footrest plane) •••
Clutch lever
Clutch lever free play (lever end) 10.0 - 15.0 mm •••
Throttle grip
Throttle cable free play 3.0 - 5.0 mm •••
ProCarManuals.com
SPECMAINTENANCE SPECIFICATIONS
2-14
Tightening
Part to be tightened Thread torque
Remarkssize
N·mm·kg
Engine mounting and rear frame:
Engine front/Stay engine M10 x 1.25 64 6.4
Stay engine (engine front)/Frame M10 x 1.25 64 6.4
Engine rear under/Frame M10 x 1.25 68 6.8
Engine top/Stay engine M10 x 1.25 64 6.4
Engine protector/Frame M6 x 1.0 7 0.7
Chain tensioner top/Frame M8 x 1.25 23 2.3
Chain tensioner under/Frame M8 x 1.25 23 2.3
Frame/Rear frame (upper) M8 x 1.25 23 2.3
Frame/Rear frame (under) M8 x 1.25 23 2.3
Rear frame/Air filter assy M6 x 1.0 5 0.5
Front fork and steering:
Handle crown/Inner tube M8 x 1.25 28 2.8
Handle crown/Steering shaft M28 x 1.5 4 0.4 See “NOTE”
Steering shaft/Ring nut M36 x 1.5 115 11.5
Holder handle upper/Crown handle M8 x 1.25 20 2.0
Holder handle under/Crown handle M10 x 1.5 40 4.0
Front fork under bracket/Inner tube M8 x 1.25 23 2.3
Front master cylinder/Cap M4 x 0.7 1.5 0.15
Front master cylinder/Handle M6 x 1.0 9 0.9
Union bolt tightening M10 x 1.0 20 2.0
Front fender/Front fork M6 x 1.0 7 0.7
Stay headlight/Handle crown M6 x 1.0 10 1.0
Stay headlight/Bracket meter M6 x 1.0 6 0.6
Headlight/Stay headlight M6 x 1.0 10 1.0
Rear arm and cushion:
Pivot shaft/Frame M14 x 1.5 90 9.0
Arm relay/Frame M10 x 1.25 60 6.0
Arm relay/Rod connecting M10 x 1.25 52 5.2
Arm relay/Shock absorber M10 x 1.25 59 5.9
Rod connecting/Rear arm M12 x 1.25 66 6.6
Shock absorber upper/Frame M12 x 1.25 66 6.6
Seal guard/Rear arm M6 x 1.0 4 0.4
Support chain/Rear arm M6 x 1.0 9 0.9
Chain case/Rear arm M6 x 1.0 9 0.9
Front wheel:
Front wheel shaft/Front fork M16 x 1.5 59 5.9
Axle holder//Front fork M6 x 1.0 9 0.9
Rear wheel:
Rear wheel shaft/Nut M18 x 1.5 115 11.5
Clutch hub/Sprocket M10 x 1.25 48 4.8
Tightening torques
ProCarManuals.com
SPECMAINTENANCE SPECIFICATIONS
2-16
Tightening
Part to be tightened Thread torque
Remarkssize
N·mm·kg
Starting motor cord/Starting motor M6 x 1.0 11 1.1
Wire minus lead (-)/Starting motor M6 x 1.0 10 1.0
Front flasher lights/Stay, headlight M6 x 1.0 1.5 0.15
Clutch wire/Engine M6 x 1.0 7 0.7
Assist grip (Standing handle)/Rear frame M8 x 1.25 23 2.3
Speedometer M5 x 0.8 4 0.4
Air filter case 1/Air filter case 2 (L = 13 mm) M3.9 0.5 0.05
Air filter case 1/Air filter case 2 (L = 19 mm) M3.9 1 0.1
Hose clamp/Joint, carburator M4 x 0.7 0.6 0.06
Hose clamp/Air cleaner/Carburator M5 x 0.8 0.8 0.08
Battery (+)/(-) M6 x 1.0 2.5 0.25
NOTE:
1. First tighten the ring nut approximately 38 Nm (3.8 mkg) by using the torque wrench, then loosen the
ring nut one turn.
2. Final tighten the ring nut at the torque of 4 Nm (0.4 mkg).
ProCarManuals.com