Chain 'M1Eel, Camshaft - MZ 125 SX Repair Manual

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1
Cylinder Head
6.7.4 Chain Wheel, Camshaft
Removal
1. Hold the camshaft with the open-jawed spanner ST 16 and
screw off the chain wheel screw with ST 13.
Inspection
- Camshaft:
(A) Intake: 32.80 - 32.90 mm; minimum 32.65 mm
Exhaust: 31.95 - 32.05 mm; minimum 31.80 mm
(B)
Intake: 25.95 - 26.05 mm; minimum 25.80 mm
Exhaust: 25.95 - 26.05 mm; minimum 25.80 mm
(C)
Intake: 6.85 mm
Exhaust: 6.15 mm
Outer diameter at the bearing: 19.967 - 19.98 mm
Clearance between the camshaft and cover: 0.020 - 0.046 mm
maximum permissible eccentricity at the bearing: 0.03 mm
- Chain Wheel, Camshaft:
\/\/hen the components are adjusted correctly, light markings can
be seen centred on the edges of the timing chain (1) and the
edges of the chain wheels (2).
If there is too little tension in the timing chain, the chain links do
not grip the teeth of the chain wheels correctly. These are worn
out more quickly, the markings are located near the edges.
If the chain wheel is worn out or damaged: Replace the timing
chain and chain wheels as a set.
Replace the crankshaft as well, if significant wear is found.
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MZ 125 SXlSM Repair Manual