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Self installation instructions for
Helmets and Speakers

Determine if ear noise reduction muffs will fit in your helmet.
Helmet Speaker Installation | HJC 2012 Model CL Max ll Modular Helmet Installation | HJC 3/4 Open Face FG-JET Snowmobile Helmet Installation
Shoei Neotec Modular Helmet Installation | Motorcycle Half Helmet Installation | NEXX Dual Sport Helmet | Tools Needed to Modify All Helmets

HJC 2012 Model CL Max Modular Helmet Installation
Transformed into
Quiet Ride Helmet

If you need to see a larger view please click on any picture, use back button on browser to return to this page.

Step 1 - HJC helmet before modification
Step 2 - View of helmet

First two pictures above is a standard CL Max ll HJC Modular Helmet.

Step 5 - HJC helmet before modification
Remove the ¾” electricians tape to separate earmuff ABS washer and pad from ABS cup.
Step 6 - View of helmet
Unsnap ABS washer and pad from ABS cup by squeezing ABS cup
while pulling on ABS washer.

Step 7 - HJC helmet before modification
Use ABS cup to trace around inside of APS Styrofoam side padding shown below. When done tracing snap ABS cup and ABS washer back together and reinstall 3/4" tape over seam between ABS cup and washer. Taping seam is important in providing noise reduction quality of earmuffs.
Step 8 - View of helmet
ABS Earmuff cup placed in position against EPS Styrofoam side pad to trace location for making earmuff pocket.

Step 9 - HJC helmet before modification
Line drawn on plastic covering over EPS Styrofoam left side pad.
Step 11 - HJC helmet styrofoam cutout
EPS Styrofoam cut out for earmuff pocket. Chin strap and metal chin strap connection must be relocated down and forward 2 1/4". It is impossible to properly Velcro air bladder to inside of helmet shell until metal chin strap connection to helmet and chin strap is removed from earmuff pocket.

Step 12 - Metal chin strap
Metal chin strap shown in new location. It is attached to helmet by drilling 3/16" hole in the helmet and attached using a short 3/16" pop rivet.
HJC helmet side pad
Side pad and what is left of EPS Styrofoam is reinstalled to left side of helmet.

Chin strap relocation
  With chin strap and chin strap metal connection relocated, it is now
possible to stick on loop Velcro piece included in the earmuff kit.

Step 13 - HJC helmet before modification
Cheek pad before modification.
Step 14 - View of helmet
Back side of cheek pad before modification.

Step 15 - HJC modified pad
Modified pad with part of plastic backer and foam removed.
Step 16 - Modified pad
Modified cloth folded over pad and glued to back side.

Step 17 - HJC helmet Modified foam side padding
Step 18 - Modified foam side padding

Modified foam side padding ready to install in helmet around earmuff.

Step 19 - HJC helmet modified left side
Modified left side EPS Styrofoam side pad with attached vinyl and padding to accept earmuff.
Step 20 - View of helmet
Modified left side EPS Styrofoam side pad with attached vinyl installed on left side of helmet with screw reinstalled to hold EPS Styrofoam piece in place. Loop Velcro stuck to inside of helmet shell in pocket to attach to hook, Velcro stuck on air bladder.

Step 21 - HJC helmet left side of bladder
Left side bladder with hook Velcro is stuck to loop Velcroed in helment shell. Note the bladder is positioned in forward lower earmuff pocket. In all cases this makes it easier for earmuff to seal lower area around ears in area of the jaw bones, which is an irregular surface versus flat head bone area above the ear using less air pressure.
Step 22 - Padding reinstalled
Foam side padding is reinstalled on left side EPS Styrofoam padding and attached using one snap button and loop and hook Velcro attached to both ends of side pads to the helmet shell and to the EPS styrofoam.

Step 23 - HJC Air lines from bladder
Air lines from bladder are ready to be cut to length and attached to air valve and earmuff Velcroed to air bladder.
Step 24 - airlines cut and attached
Air lines from bladders are cut to length and attached to air valve and held by two small cable clamps stuck to helmet shell by 3M VHB double face tape. A larger clamp holds air intake for air valve pump bladder.

Modification of HJC CL MAX II is complete.
  Modification of HJC CL MAX II is complete. User will enjoy over 50% reduction of wind and engine noise, versus original Standard helmet before installing noise reduction earmuffs.


About Quiet Ride Ear Muffs
Benefits of Quiet Ride Ear Muffs
Decibal effect on hearing
Dangers of wearing ear plugs
Tinnitus symptoms
Quiet Ride Ear Muff pad design

Quiet Ride Ear Muff Kit
Helmet speaker installations
HJC 3/4 Open Face FG-JET Snowmobile Helmet Installation
HJC 2012 Model CL Max ll Modular Helmet Installation
Motorcycle half helmet installation
Shoei Neotec Modular Helmet Installation
NEXX Dual Sport Helmet


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