Inspecting The Crankshaft Alignment; Refitting The Crankshaft - Derbi GP1 50 cc Workshop Manual

I I
NSPECTING THE CRANKSHAFT ALIGNMENT NSPECTING THE CRANKSHAFT ALIGNMENT
Using the appropriate specific tools, check the eccentricities
of the surfaces of diameters «A»-«B»-« C» are within 0.03
mm (top reading limit for the dial gauge clock); check also
the eccentricity of diameter «D», for which a maximum mi-
salignment of 0.02 mm is allowed. In the event that the ecce-
ntricities are not too far off the prescribed values, straighten
the crankshaft by acting with a wedge in between the coun-
terweights or by using vice (with aluminium mouth guards)
according to your needs.
Specific tooling
020335Y Magnetic stand and comparator
020074Y Crankshaft aligning tool
R
EFITTING THE CRANKSHAFT G C
- Rest the transmission-side half-crankcase on two wooden
supports.
- Using a heat gun, heat the bearing housing up to approx.
120°.
- Insert the crankshaft and push it in as far as the bearing
will go.
67
S