Beta RR250 - Engine Checks and Assembly; Crankcase Half

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ENGINE CHECKS AND ASSEMBLY
Before reassembling the engine, a series of
crucial checks must be carried out to ensure
the engine is in good working order.
In order to insert the bearings into the
crankcase halves, heat the crankcase halves
to 150°C and keep them at constant temper-
ature for 20 minutes.
Place said crankcase halves on a large sur-
face where their whole seal surface can rest.
When the bearings cool down, they drop into
their seats on their own.
3.1 CRANKCASE HALF
The crankcase halves have some parts that require
care, and their integrity and condition must be
checked. The checks and assembly operations of
the individual parts coupled to the crankcases are
described below. The threading and oil passages A
should be cleaned thoroughly by using a degreaser
and compressed air.
Crankshaft bearings lubrication holes.
3 ENGINE CHECKS AND ASSEMBLY