FRONT CHAIN ADJUSTMENT
Tighten the front chain by :
Slacken : Nut on right-hand side of gear box top fixing bolt.
Forward nut on the adjusting eye-bolt. (Two or three turns.)
Remove inspection cap from front chaincase.
Screw up the rear nut on adjusting eye-bolt until, with the finger through the inspection
cap orifice, it can be felt that the chain is dead tight. Then slack off the rear nut and
carefully tighten the forward nut until the correct chain tension is obtained, after which
securely tighten the rear nut to lock the assembly. (The correct chain whip is a inch.)
Check the adjustment in more than one position and adjust, as above, at tightest place.
It is important that these instructions to over-tighten and then slack back
are carefully followed.
Tighten nut on gear box top fixing bolt.
Replace chaincase inspection cap.
REAR CHAIN ADJUSTMENT
To obtain rear chain adjustment the rear wheel is bodily moved in the rear frame fork
ends which are slotted for the purpose. Adjusting screws with lock nuts are provided
on the forward side of each slotted end.
To adjust the chain place cycle on stand and slightly slacken wheel spindle end nut (both
ends on rigid frame models). On spring frame models also slightly slacken the brake
drum dummy spindle locknut, the hexagon of which is adjacent to the spindle end nut.
Then slacken back the adjuster screw lock nut on each side and screw each adjuster bolt
in turn further in on rigid frame models and further out on spring frame models until
the correct chain tension is obtained, taking care to move each side adjusting screw
exactly the same amount.
While on the stand the chain whip should be ½" in the case of rigid frame models and
18" for spring frame models (see notes below). Then retighten spindle end nut or nuts
and also the adjuster screw lock nuts. Chain whip must always be checked midway
between the two sprockets and the rear wheel should always be turned to obtain the
position of least slackness. This is because rear chains rarely wear evenly and there is
usually one position at which the chain is tighter than at any other. It is at this tightest
position that the adjustment check should be made.
NOTE—On spring frame models the chain adjustment specified while cycle is on the
stand is reduced to ½" when the wheel is on the ground and rider seated. This
is due to chain sprocket centres varying slightly as the result of movement of
the rear swinging arm.
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