Preparing the oil change
- Place your bike on its rear stand or in an assembly stand so that you can later tilt it sideways to the left or lay it down to drain the oil.
- Leave the wheel unused for about 2 hours so that the oil can collect on the gearbox floor.
- Carry out the work at room temperature: Cold makes oil viscous, it does not flow off.
- Dispose of used oil at your recycling centre or a used oil collection point. It must not enter the sewage system.
- Wear gloves, protective goggles and clothing.
Opening the gearbox cover
Loosen the four screws (2.5 mm Allen key) of the gearbox cover one after the other and remove it. It is located on the left-hand side of the housing, where the shift cables are located, above the crank axle. The oil drain plug is also located underneath.
Cleaning
If moisture or dirt has penetrated under the cover, take this opportunity to remove the sludge from the housing.
Open the drain plug
Loosen the recessed grub screw with a 3 mm Allen key. Unscrew this screw completely and put it safely to one side. Don't worry: the oil won't splash out, it will just drip out gently.
Drain oil
Hold the collection container under the opening and allow the viscous, used oil to drip off. You can tilt the wheel sideways or even lay it flat on its left side to speed up the draining process. The amount drained may be significantly less than the filling quantity of 60 ml, as the oil is distributed throughout the gearbox.
Ventilate
You can use a wire (shift cable or similar) to help the oil drain: Carefully poke the wire into the hole. Do not shift gears or crank during the filling process!
Fill with oil
When no more oil flows out, place the filled oil syringe with 60 ml of transmission oil in the opening and gently press all the fresh oil into the transmission. Use an absorbent cloth to catch the excess before it drips to the ground.
Clean finish
If the syringe is empty, pull the piston back a little without setting it down. This will suck the excess oil out of the bore and create space for the sealing screw. Pinion's gear oil separates water. The oil change serves to remove condensation from the gearbox.
Glue sealing screw
Apply some medium-strength threadlocker to the sealing screw. The locking adhesive works despite the oil adhesion.
Screw in the screw
Insert the grub screw into its thread and first turn it slightly backwards to find the start of the fine thread. Then screw it hand-tight all the way into the recessed thread.
Torque
Now switch to the torque spanner and tighten the drain screw to 2.5 Nm.
Grease gearbox
Apply some fresh, non-resinous grease to the exposed gears of the camshaft gearbox before closing the cover.
Close lid
Insert the gearbox cover in the correct position and screw it on hand-tight only. The flat part of the cover must point towards the crank.
Secure screws
Apply a drop of "medium-strength screw adhesive" to each of the four cover screws.
Torque
Here too, you should tighten the retaining screws with the correct torque of 1.5 Nm and alternately crosswise (1, 3, 2, 4).
Degrease
Finally, wipe all oil and grease residues from the gearbox housing with a little isopropyl alcohol and an absorbent cloth.
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