Derailleur Adjustment
MPORTANT: It is advised that you have a professional bicycle mechanic adjust the front or rear derailleur.
Rear Derailleur
Adjustment
Adjustment to the rear derailleur can be done while turning the cranks, in a stationary position, while the rear wheel is elevated
off the ground. Always make small adjustments first, then test while you rotate the crank and turn the shifter.
Before adjusting the derailleur, be sure the chain is clean and well lubricated. Also, lubricate the shift cables and inspect for any
kinks. Dirty, dry or kinked cables will cause shifting hesitation or failure. Stiff links in the chain will also cause shifting failure.
1. Top adjustment. Turn the top adjustment screw to position the guide pulley below the outer line of the smallest sprocket
when looking from the rear. (Fig. a)
2. Low adjustment. Turn the low adjustment screw so that the guide pulley moves to a position directly in line
with the largest sprocket. (Fig. b)
3. How to use the B-tension adjustment screw. Mount the chain on the smallest chain ring (on the crank) and the largest
sprocket (on the rear cluster), and turn crank arm backward. Then turn the b-tension adjustment screw to adjust the
guide pulley as close to the sprocket as possible but not so close that it touches. Next, set the chain to the smallest sprocket
and repeat the above to make sure that the pulley does not touch the sprocket. (Fig. c)
4. SIS Adjustment.
(a) Operate the shifting lever to move the chain from the top gear to the second gear.
If the chain will not move to the 2nd gear, turn the outer casing adjustment barrel counter clockwise to increase the ten
sion. If the chain moves past the 2nd gear , decrease the tension by turning the adjustment barrel clockwise. (Fig. d)
(b) Next with the chain on the 2nd gear, increase the inner cable tension by turning the adjustment barrel counter clockwise
while turning the crank arm forward. Stop turning the outer casing adjustment barrel just before the chain makes noise
against the 3rd gear. This completes the adjustment. (Fig. e)
Note: For best SIS performance, periodically lubricate all power-transmission parts.
SPECIAL CAUTION: The adjusting barrel is for fine adjustments to the derailleur. If the barrel is turned too far counter-
clockwise it will screw out of its threads creating a hazardous condition. The adjusting barrel must be screwed in until a maxi-
mum of 1⁄4" of thread is showing. Removing the derailleur cable slack at the rear derailleur cable anchor makes "Coarse"
adjustments to the system.
Page 6
(Fig. a)
(Fig. b)
(Fig. c)
(Fig. d)
(Fig. e)
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