TRANSMISSION
Front chain adjustment. The Scrambler Models use a chain adjuster on
each side of the gear box, to prevent the gear box from moving.
Remove the engine plate cover, also inspection cap on chaincase.
Slack off the clamp bolt.
To tighten the chain: Screw down the adjusting bolt. Press down the
rear chain to pull the gear box backwards,
Check the chain tension, which, if correct, should have a whip of a".
If the chain is too tight, unscrew the adjusting bolt a little at a time,
until the adjustment is correct.
Check the tension in several places. Chains do not always stretch
evenly. Retighten the nuts.
Now check the rear chain adjustment.
Chain case oil level. With the machine vertical and on both road wheels,
the bottom run of the chain should just touch the oil.
Rear chain adjustment (quickly detachable wheel). To take up slack or
tighten the rear chain and with the machine on the central stand;
Release slightly the spindle nut (22) and the dummy spindle nut (20).
Run back the lock nuts on the two chain adjusting bolts through fork
ends, unscrew each adjusting bolt a trifle at a time, also an equal amount,
until the chain whip taken in the centre of the bottom chain run is 1
8".
Check the tension in one or more places.
As an alternative and possibly the best method is to have this adjust-
ment made with the machine on its road wheels and the rider seated,
when the chain whip should be ½". Retighten the release nuts when the
adjustment is correct, then check the rear brake adjustment, which will
be affected when the wheel position is altered.
Rear chain adjustment (non-quickly detachable wheel). Release the
spindle nut (1) and adjust the chain as already described,
Removing the front chain. Follow details for removing engine from
frame. When refitting the chain the closed end of the spring link should
face the direction of rotation,
Removing the rear chain. The rear chain is closely shrouded by the chain
guard, which leaves little room to operate, other than releasing the chain
guard from its fixings. If a new chain is to be fitted, disconnect the con-
necting link in the fitted chain and connect it to the new chain at the top
run. Select a neutral position in the gear box then with the left hand
holding the bottom chain run and the top with the right hand, the new
chain can be pulled into position until the chain joint is accessible, when
the connecting link can be fitted.
NOTE—The closed end of the spring link should face the direction of
rotation.
If a second chain is not available, use a piece of string 10 ft. long, take
out the connecting link and pass one end of the string through the link
hole. Pull on the string until both ends meet and tie them together.
Pull on the bottom run of the chain, with one hand, keeping the string
taut with the other hand.
Heavyweight Models
100
To Next Page
Loading...
