Retrospec Valen REV+ Assembly Instructions Manual page 6

Step 7: Derailleur Gears Maintenance and Adjustment
The gears/derailleur on your bicycle should be correctly adjusted from the
factory. However, as cables do seat and stretch, it is important to check the
function of your shifting after your first ride. Note that it is not unusual for your
shifting system to need some adjustment after being used a few times.
We strongly recommend you have your e-bike serviced by your dealer or
professional bike shop/mechanic.
To ensure long life and efficiency for your drivetrain system, it must be kept clean
and properly lubricated. Before attempting any adjustments, make sure you
understand the drivetrain components functions and feel confident to attempt
such maintenance.
• Left shifter controls the front derailleur and chain wheel(s); Right shifter
controls the rear derailleur and rear cogset.
• The largest/larger rear sprockets on the cogset are the low [speed] gears
used for hill climbing and low speed technical riding; the smallest/smaller rear
cogs are for cruising and high(er) speed and downhill riding.
• NOTE: For good shifting and riding experience, follow these 4 actions:
1) Shift only when pedaling (forward), do not shift when stopped.
2) Do not use hard, aggressive pedal pressure while changing gears.
3) Never back pedal when changing gears.
4) Never force the gear shifting levers.
7.1 Rear Derailleur Adjustment:
There are two limit adjustment screws on the rear derailleur - High/"H" and Low
"L". Looking from the rear of the bike forward, the limit adjustments center the
chain on the high/large and low/small rear cogs which prevents the chain from
going over the large cog and into the wheel/left (the "H" or high adjustment
screw) or into the frame/ right (the "L" or low adjustment screw).
First, the derailleur cable tension needs to be correct. Position the shifter(s) so
the chain is on the smallest rear cog and largest front sprocket - check for cable
slack at point "B" (Fig *8). If there is slack, loosen the cable nut or hex bolt, pull
the cable tight and retighten the cable nut/bolt while pulling cable taut (tightening
torque: 7Nm).
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Fig. 8
High/Large Cog ("H") Limit Adjustment
Turn the "high limit" adjust screw marked "H" on the rear derailleur so that, again
looking from the rear, the upper guide pulley is below the vertical plane of the
center of the top/large cog.
Low/Small Rear Cog ("L") Limit Adjustment
Turn the "low limit" adjust screw marked "L" on the rear derailleur so that, again
looking from the rear, the upper guide pulley is below the vertical plane of the
center of the low/small cog.
Operate the shift lever to shift the chain from top gear to 2nd gear.
• If the chain will not move to the 2nd gear, turn the cable adjusting barrel on
the rear derailleur to increase the tension (counterclockwise)
• If the chain moves past the 2nd gear, decrease the tension (clockwise) 2) Next,
with the chain on the 2nd gear, increase the inner cable tension while turning
the crank forward. Stop turning the cable adjusting barrel just before the
chain makes noise against the 3rd gear. This completes the adjustment. Make
sure the drivetrain is clean. We suggest "dry" lubricants for most applications.
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