mxu 400 Werkstatthandbuch : Seite 33

                     Specifications*


                   VALVES AND GUIDES                                            CYLINDER, PISTON, AND RINGS
Valve Face Diameter               (intake) 30.6 mm (1.20 in.)      Piston Skirt/Cylinder Clearance            0.060-0.073 mm
                                (exhaust) 27.0 mm (1.06 in.)                                                  (0.0024-0.0029 in.)
Valve/Tappet Clearance            (intake) 0.076-0.127 mm          Piston Diameter 15 mm (0.6 in.)            80.98-81.00 mm
(cold engine)                              (0.003-0.005 in.)       from Skirt End                             (3.188-3.189 in.)
                                (exhaust) 0.152-0.203 mm
                                           (0.006-0.008 in.)       Piston Ring Free End Gap (min)       (1st) 8.0 mm (0.3150 in.)
                                                                                                       (2nd) 8.3 mm (0.3268 in.)
Valve Guide/Stem Clearance         (intake) 0.04 mm
(max)                                       (0.0016 in.)           Bore x Stroke                              81.0 x 71.2 mm
                                 (exhaust) 0.06 mm                                                            (3.19 x 2.80 in.)
                                            (0.0024 in.)           Cylinder Trueness                  (max) 0.01 mm (0.0004 in.)
Valve Guide/Valve Stem              (max) 0.35 mm (0.014 in.)      Piston Ring End Gap - Installed            0.15-0.30 mm
Deflection (wobble method)                                                                                    (0.006-0.012 in.)
Valve Guide Inside Diameter                5.000-5.015 mm          Piston Ring to Groove           (1st/2nd) 0.06 mm (0.002 in.)
                                           (0.1969-0.1974 in.)     Clearance (max)
Valve Stem Outside Diameter       (intake) 4.975-4.990 mm

                                                                                                                                        3
                                                                   Piston Ring Groove Width             (1st) 1.01-1.03 mm
                                           (0.1959-0.1965 in.)                                                 (0.0398-0.0406 in.)
                                (exhaust) 4.955-4.970 mm                                               (2nd) 1.21-1.23 mm
                                           (0.1951-0.1957 in.)                                                 (0.0476-0.0484 in.)
Valve Stem Runout                   (max) 0.05 mm (0.002 in.)                                            (oil) 2.01-2.03 mm
                                                                                                               (0.0791-0.0799 in.)
Valve Head Thickness              (intake) 2.03 mm (0.08 in.)
                                (exhaust) 2.28 mm (0.09 in.)       Piston Ring Thickness                (1st) 0.97-0.99 mm
                                                                                                              (0.0381-0.0389 in.)
Valve Face/Seat Width (min)       (intake) 2.25 mm (0.089 in.)                                         (2nd) 1.17-1.19 mm
                                (exhaust) 2.55 mm (0.100 in.)                                                 (0.0461-0.0469 in.)
Valve Seat Angle         (intake/exhaust) 45°                      Piston Pin Bore                    (max) 20.008 mm (0.7877
                                                                                                            in.)
Valve Face Radial Runout            (max) 0.03 mm (0.001 in.)
                                                                   Piston Pin Outside Diameter         (min) 19.994 mm (0.7872
Valve Spring Free Length            (min) 42.8 mm (1.69 in.)                                                 in.)
Valve Spring Tension               (outer) 18.6-21.4 kg                                     CRANKSHAFT
@ 32.5 mm (1.28 in.)                       (41-47 lb)
                                                                   Connecting Rod                     (max) 20.021 mm
           CAMSHAFT AND CYLINDER HEAD                              (small end inside diameter               (0.7882 in.)
Cam Lobe Height (min) (intake/exhaust) 13.46 mm (0.530 in.)        Connecting Rod                             0.10-0.55 mm
Camshaft Journal Oil Clearance      (max) 0.081 mm (0.003 in.)     (big end side-to-side)                     (0.004-0.022 in.)

Camshaft Journal Holder (right & center) 22.01-22.04 mm            Connecting Rod (big end width)             21.95-22.00 mm
Inside Diameter                           (0.8665-0.8677 in.)                                                 (0.8642-0.8661 in.)
                                   (left) 17.51-17.54 mm           Connecting Rod                     (max) 0.3 mm (0.012 in.)
                                          (0.6893-0.6905 in.)      (small end deflection)
Camshaft Journal           (right & center) 21.959-21.980 mm       Crankshaft (web-to-web)                    60.8-60.9 mm
Outside Diameter                             (0.8645-0.8654 in.)                                              (2.393-2.397 in.)
                                      (left) 17.466-17.480 mm
                                             (0.6876-0.6882 in.)   Crankshaft Runout                  (max) 0.03 mm (0.001 in.)
Camshaft Runout                     (max) 0.03 mm (0.0012 in.)         * Specifications subject to change without notice.
Rocker Arm Inside Diameter                 12.000-12.018 mm
                                           (0.472-0.473 in.)
Rocker Arm Shaft Outside Diameter          11.975-11.987 mm
                                           (0.4715-0.4719 in.)
Cylinder Head Distortion            (max) 0.05 mm (0.002 in.)
Cylinder Head Cover Distortion      (max) 0.05 mm (0.002 in.)




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