Yamaha VMX12 2001, Service Manual

Page: 33 / 454

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SPEC
ENGINE SPECIFICATIONS
Clutch
Clutch type Wet, multiple disc ----
Clutch release method Hydraulic inner push ----
Operation Left-hand operation ----
Friction plates
Thickness 2.9 ~ 3.1 mm 2.8 mm
Plate quantity 8 ----
Clutch plates
Thickness 2.2 ~ 2.4 mm ----
Plate quantity 7 ----
Max. warpage ---- 0.2 mm
Clutch springs
Free length 7 mm ----
Spring quantity 1 PCS ----
Minimum length ---- 6.5 mm
Clutch housing thrust clearance 0.10 ~ 0.27 mm ----
Clutch housing radial clearance 0.017 ~ 0.053 mm ----
Push rod bending limit ---- 0.5 mm
Transmission
Transmission type Constant mesh, 5-speed ----
Primary reduction system Spur gear ----
Primary reduction ratio 87/49 (1.776) ----
Secondary reduction system Shaft drive ----
Secondary reduction ratio 21/27
×
33/10 (2.567) ----
Operation Left-foot operation ----
Gear ratios
1st gear 43/17 (2.529) ----
2nd gear 39/22 (1.773) ----
3rd gear 31/23 (1.348) ----
4th gear 28/26 (1.077) ----
5th gear 26/28 (0.929) ----
Max. main axle runout ---- 0.08 mm
Max. drive axle runout ---- 0.08 mm
Shifting mechanism
Shift mechanism type Guide bar ----
Max. shift fork guide bar bending ---- 0.025 mm
Installed shift rod length 367.8 mm ----
Air filter type Dry element ----
Fuel pump
Pump type Electrical ----
Model (manufacturer) UCV5A (MITSUBISHI) ----
Consumption amperage <max> 1 A ----
Output pressure 18 kPa (0.18 kgf/cm
2
) ----
Item Standard Limit