Yamaha TTR90(M), Owner'S Service Manual

Page: 63 / 287

SPEC
2 - 8
Crankshaft:
Crank width “A” 42.95 ~ 43.00 mm
(1.691 ~ 1.693 in) ----
Runout limit C ---- 0.03 mm
(0.0012 in)
Big end side clearance “D” 0.1 ~ 0.4 mm
(0.0039 ~ 0.0157 in) 0.50 mm
(0.02 in)
Big end radial clearance “E” 0.010 ~ 0.025 mm
(0.0004 ~ 0.0010 in) 0.05 mm
(0.002 in)
Clutch:
Friction plate thickness 2.7 ~ 2.9 mm
(0.106 ~ 0.114 in) 2.6 mm
(0.102 in)
Quantity 5 ----
Clutch plate thickness 1.1 ~ 1.3 mm (0.043 ~ 0.051 in) ----
Quantity 4 ----
Warp limit ---- 0.05 mm
(0.002 in)
Clutch spring free length 26.2 mm (1.03 in) 24.2 mm
(0.95 in)
Quantity 4 ----
Clutch release method Inner push, cam push ----
Push rod bending limit ---- 0.5 mm
(0.02 in)
Automatic centrifugal clutch: ----
Clutch-in revolution 2,000 ~ 2,400 r/min ----
Clutch-stall revolution 3,100 ~ 3,700 r/min
Shifter:
Shifter type Cam drum and guide bar ----
Kick starter:
Type Ratchet type ----
Kick clip friction force 5.8 ~ 14.7 N
(0.59 ~ 1.50 kg, 1.3 ~ 3.3 lb)
Carburetor:
I. D. mark 5HN 00 ----
Main jet (M.J) #90 ----
Main air jet (M.A.J) ø 1.1 ----
Jet needle (J.N) 4E9-2 ----
Cutaway (C.A) 2.5 ----
Pilot outlet (P.O) ø 1.0
×
2.0 ----
Pilot jet (P.J) #12.5 ----
Valve seat size (V.S) 1.5 ----
Starter jet 1 (G.S.1) #37.5 ----
Pilot air screw 1-3/4 turns out
Float height (F.H) 2 ~ 3 mm (0.08 ~ 0.1 in) ----
Fuel level (F.L) 15.5 ~ 16.5 mm (0.65 ~ 0.65 in) ----
Engine idle speed 1,450 ~ 1,550 r/min ----
Item Standard Limit
MAINTENANCE SPECIFICATIONS
C
C
D
A
E