VX800 SERVICE DATA

 

 

ITEM STANDARD LIMIT
Valves and Guides
Valve diamater IN  30  (1.18)
EX  26  (1.02)
Valve lift  IN  8.5 (0.33)
EX 8.5 (0.33)
Valve clearance -cold IN. & EX 0.08-0.13   (0.003-0.005)
Valve guide to valve stem clearance IN 0.020-0.047 (0.0008-0.0019) 0.35 (0.014)
EX 0.035-0.062 (0.0008-0.0019) 0.35 (0.014)
Valve guide I.D. IN. & EX.  5.500-5.512 (0.2165-0.2170)
Valve stem O.D. IN 5.465-5.480 (0.2152-0.2157) 
EX 5.450-5.465  (0.2152-0.2157)
Valve stem runout IN. & EX 0.05 (0.002)
Valve head thickness IN. & EX 0.5   (0.02)
Valve stem end length IN. & EX 4.0  (0.16)
Valve seat width IN. & EX. 0.9-1.1 (0.035-0.043)
Valve head radial runout IN. & EX. 0.03 (0.001)
Valve spring free length INNER 38.3 (1.51)
OUTER  40.1 (1.58)
Valve spring tension  INNER  6.51-7.49kg(14.35-16.51 lbs)
at length 32.5 mm (1.28 in)
OUTER    12.09-13.91kg (26.65-30.67 lbs)
at length 36.0 mm (1.42 in)

ITEM

STANDARD

LIMIT

CAMSHAFT + CYLINDER HEAD 
Cam height  IN   35.954-35.994(1.4155-1.4171) 35.660(1.4039)
EX  36.919-36.959(1.4155-1.4171) 35.660(1.4039)
Camshaft journal oil clearance  0.032-0.066(0.0013-0.0026) 0.150
Camshaft journal holder I.D. No.1 Left side 20.012-20.025 
No.2 Right side (0.7879-0.7884)
No.1 Right side 25.012-25.025
No.2 Left side  (0.9847-0.9852)
Camshaft journal O.D.    No.1 Left side 19.959-19.980
No.2 Right side (0.7858-0.7866)
No.1 Right side  24.959-24.980 
No.2 Left side (0.9826-0.9835)
Camshaft runout 0.10 (0.004)
Cam chain 20-pitch length 128.9 (5.07)
Rocker arm I.D IN. & EX. 12.000-12.018 
(0.4724-0.4731)
Rocker arm shaft  O.D   IN. & EX. 11.966-11.984
(0.4711-0.4718)
Cylinder head distortion  0.05 (0.002)
Cylinder head cover distortion 0.05 (0.002)

ITEM

STANDARD

LIMIT

CYLINDER + PISTON + PISTON RING 
Compression pressure   1 300- 1 600 kPa 1 300- 1 600 kPa 
  (13-16 kg/cm2) 11 kg/cm2
(185-228psi)  (156psi)
Compression pressure difference 200 kPa(2 kg/cm2)(28 psi)
Piston to cylinder clearance    0.045-0.055  (0.0018-0.0022) 0.120(0.0047)
Cylinder bore 83.000-83.015 83.085
(3.2677-3.2683 (3.2711)
Piston diam. 82.950-82.965   82.880
Measure at 15 mm (0.6 in) from the skirt end. (3.2657-3.2663) (3.2630)
Cylinder distortion   0.05 (0.002)
Piston ring free end gap 1st      Approx 10.5  (0.413)  8.4 (0.331)
2nd     Approx 11.8 (0.465) 9.4 (0.370)
Piston ring end gap  1st 0.20-0.35(0.008-0.014) 0.70(0.028)
2nd  0.20-0.35(0.008-0.014) 0.70(0.028)
Piston ring groove clearance 1St 0.180 (0.007)
2nd     0.150 (0.006)
Piston ring groove width  1st  1.01-1.03
(0.0398-0.0406)
2nd 1.21-1.23
(0.0476-0.0484)
Oil 2.51-2.53
(0.0988-0.0996)
Piston ring thickness  1St 0.970-0.990  
(0.0382-0.0390)
2nd  1.170-1.190  
(0.0461-0.0469)
Piston pin bore  20.002-20.008  20.030
 (0.7875-0.7877)  (0.7886)
Piston pin O.D. 19.996-20.000 19.980
(0.7827-0.7874) (0.7866)

ITEM

STANDARD

LIMIT

CONROD + CRANKSHAFT
Corod small end I.D. 20.010-20.018 20.040
(0.7878-0.7881)  (0.7890)
Conrod big end side  0.10-0.20 0.30
clearance (0.004-0.010)  (0.012)
Conrod big end width 21.95-22.00  
(0.864 - 0.866)
Crank pin width  22.10-22.15 
(0.870-0.872)
Conrod big end oil  0.024-0.042 0.080 
clearance  (0.0009-0.0017)  (0.0031)
Crank pin OD. 40.982-41.000
(1.6135-1.6142)
Crankshaft journal oil  0.020-0.050   0.080         
clearance (0.0008-0.0020) (0.0031)
Crankshaft journal O.D. 47.965-47.980
(1.8884-1.8890)
Crankshaft thrust bearing 1.925 - 2.1 75
thickness (0.0758-0.0856)
Crankshaft thrust clearance   0.05-0.10
(0.0020-0.0040)
Crankshaft runout  0.05 (0.002)

ITEM

STANDARD

LIMIT

OIL PUMP
Oil pump reduction ratio  1.859 (71/42 x 32/29)
Oil pressure  at 3 000 r/min. Above 350 kPa 
(at 600C,1400F) (3.5 kg/cm2, 50 psi)
at 3 000 r/min. Below 650 kPa 
(6.5 kg/cm2, 92 psi)
CLUTCH    
Clutch cable play 4  (0.2)
Clutch release screw ¼ -½ turn back
Drive plate thickness No 1 2.65-2.95
(0.104-0.116)
  No 2 3.45-3.55
(0.136-0.140) 
Driven plate distortion

  0.10(0.004)

Clutch spring free length No 1 24.6 (0.97)
No 2 23.3 (0.92)

The specifications here are for information only. No Guarantee is made of the accuracy.  Buy the Service manual !