Tekno RC ET48.3, Building Instructions

17

Shock Filling Instructions

For both front and rear shocks

The following steps and information will provide you with the best way to fill and bleed your

shocks. After thorough testing, we've found it's easiest to complete steps 1 through 3 on each

shock before moving onto step 4. By the time you've finished step 3 on the last shock the first

one will be ready for step 4.

Standard or Vented Cap Build:

Step 1: 

Extend the shock shaft all the way down. Fill the shock with oil until the it is about 90% full.

Step 2:

 Slowly pump the shock shaft up and down 3-5 times to release air bubbles from underneath 

the piston.

Step 3:

 Let the shock rest vertically with the shock shaft fully extended for five minutes or until all 

the air bubbles have released.

Step 4:

 Next you will top off the shock with oil, to about 1-2mm below the top edge.  

(If you do overfill the shock, it won’t hurt performance, it will just spill out and make a little bit of a 
mess. If you underfill the shock, it will cause air to be trapped inside.)

Step 5:

 Place the bladder 

INSIDE

 the shock cap and put a few drops of oil on the bladder.  

Step 6:

 Put a paper towel down below the build to catch drips and have another ready to 

wipe off excess oil.  Place the cap on the shock and screw down about half way.  Lay the shock 
over about 45 degrees with the bleeder hole facing up.

Step 6A:

(Standard non-vented “Stock”)

 Push the shaft in for the amount of rebound desired.

Step 6B:

(Vented)

 Push the shaft in until about 15mm of shaft is showing.

• 

Make sure that you match the rebound amount between the left and right shocks.  

• 

Oil should be oozing out of the bleeder hole.  

Step 7: 

Hold the cap firmly in place with the bleeder hole facing up and turn the shock body until 

hand tight.  The shock will continue to ooze oil. 

Step 8:

 Fully tighten down each shock with shock tools until cap is secure and wipe excess oil away.

Emulsion Build:

Prep your shock caps TKR6018 (optional for ET48) accordingly by drilling out the large angled 
bleeder hole in the top of the cap. Place the larger thin o-ring around the base of the threads 
where the shock cap screws on (see diagram on the next page). This seal is crucial to the build.

Follow steps 1-4 above.
Step 5:

 Rebound is more of a natural side effect of an emulsion shock. It’s not something that can 

be set accurately because you run the risk of hydrolocking the shock if you do not push the shaft 
all the way in when you bleed it. For now leave the shaft fully extended.

Step 6:

 Fill the shock up, over filling just slightly without spilling to create a small dome of oil.

Step 7:

 Place a little bit of oil in the shock cap and quickly put the shock cap on the shock body. 

Tighten the cap all the way down. Very slowly push the shaft in. Oil will start to bleed out of the top 
of the cap. While wiping away excess oil, continue to slowly push the shaft in 

ALL THE WAY

. 

If no oil comes out when the shaft is fully inserted, you will need to start over at step 6. 

Step 8: 

Install the TKR1341 M4x6mm flat head screw and TKR5125 black o-ring to seal 

the cap (see diagram). Tighten until o-ring is fully seated.