Derbi Rambla 250 Manual page 132

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Engine
Locking torques (N*m)
Screws for engine crankcase internal bulkhead (transmission-side half shaft) 4÷6 (3÷4.4 ftlb)
Engine crankcase coupling screws 11÷13 (8.1÷9.6 ftlb) engine oil drainage plug/mesh filter 24÷30
(17.7÷22.1 ftlb) Oil filter fitting on crankcase 27÷33 (19.9÷24.4 ftlb)
Studs
Check that the stud bolts have not worked loose
from their seats in the crankcase.
Check the depth of stud bolt driving with a gauge,
as indicated in the photograph. If it driving depth
varies significantly from that indicated, it means
that the stud bolt has yielded.
Should this occur, replace it.
By working on two cylinder head fixing nuts fitted,
nut and lock nut, remove the stud bolt from its seat
as shown in the photograph.
Thoroughly clean the threaded seat on the crank-
case.
Refit a new stud bolt and apply the special product
on the crankcase side thread.
Tighten up to the driving depth indicated.
Recommended products
Loctite Quick Set Loctite 270 maximum
strength threadlock
Loctite 270 maximum strength threadlock
ENG - 132

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