"CRUSADER
250," "250
CLIPPER"
AND
"CRUSADER
SPORTS"
up-and-down play can be felt in either the big end
or
the
main bearings, the engine will have to be removed from
the frame for new parts
to
be fitted.
The gudgeon pin
is
fully floating and of large
diameter. When the engine
is
cold it should be a free
working
fit
in the small end of the rod and a push fit
in the piston bosses.
30
Removal and Dismantling of Engine. Probably
most Royal Enfield owners will never
find
it necessary
to remove the engine from the frame and
if, after a long
period of use, an overhaul
is
required, will send the
machine back
to
the Works. Therefore, details of engine
removal and dismantling will not be given here.
31
Timing Chain Adjustment. The camshaft
is
chain
driven from the near-side end of the crankshaft.
To
obtain access to the chain, remove the near-side engine
cover, first placing a tray beneath the engine to catch
escaping oil. Slacken the two tensioner nuts and adjust
to
give a minimum of slackness in the chain. After
replacing the chaincase cover, replenish with about
one-third of a pint of engine oil before starting erigine.
32 Valve Timing.
If
the timing chain
is
removed for
any reason, e.g., the fitting of a new primary chain, place
the piston at top dead centre and line up the marks on
the timing sprockets, as shown in Fig.
4,
before replacing
the chain. Adjust the chain tension
as
described
in
Section 31.
For
those who wish to check the valve timing the
opening and closing points are given below.
On
1960 models the following instructions
apply:-
Valve Timing with
·O
15
in. Clearance:
"250 Clipper" and "Crusader
250"-
Exhaust opens
Exhaust closes
Inlet opens
Inlet closes
21
95
° before B.D.C.
37° after T.D.C.
60
° before T.D.C.
65
° after B.D.C.
To Next Page
Loading...
Need help?
General
