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It is essential to clean your shock after each day of riding without waiting! Nothing is worse for the life of 
your seals than dirt and dust. 
 
The cleaning process is also extremely simple: wipe off the body and the seal with a clean, soft rag. You can 
occasionally lubricate the exterior of the seal with fork oil. 
 

Do not under any circumstances use degreaser. On the same note, do not power wash the shock's 
seals! It will only push the mud inside the shock and get it stuck between the shaft and the seals. 

 

 

Every ride 

Every six 

months 

Every 

year 

Every two 

years 

Cleaning 

 

 

 

Basic service 

(Oil change) 

Recreational use 

 

 

 

Racing use 

 

 

 

Complete Service 

Recreational use 

 

 

 

Racing use 

 

 

 

 

The oil service and full service should be performed by a BOS-approved service center. 
Only  BOS  service  centers  are  able  to  identify  and  appraise  a  damaged  or  worn  part, 
especially in case of shock or wear on structural elements such as the chamber, the shaft, 
the body. 

 
 
 
What is the basic set up? 
Your shock has been set up for your bike, with a specific internal valving spring weight. You can find all the 
information about standard settings for your bike in the chartlist on the BOS website bos-suspension.com. 
 
Where can I purchase original stickers? 
You  can  purchase  these  items  through  your  approved  BOS  center,  or  on  the  BOS  store  on  bos-
suspension.com. 

 

I noticed some play between my shock and the frame, what can I do? 
Check that your mounting hardware is torqued to your manufacturer’s specifications. If it is, the rear shock 
mounting  hardware    must    be    replaced.    Contact  an  approved  BOS  service  center,  or  connect  on 
bosmtb.com. 
 
My shock makes a whistling or clicking sound when I compress it. 
These sounds are normal to the functioning of the hydraulics when the rebound or low-speed compression 
circuit  is  closed  or  almost  closed.  Check  your  settings  and  bring them  closer to the base  settings  in  your 
product’s user manual to reduce this noise. 
 
For any other questions, please visit our FAQ page on the BOS website or send us a message to 

sales@bos-

suspension.com

. 

 
You will also be able to obtain the service or warranty request forms and the revision  rates for your BOS 
product on our website www.bos-suspension.com or by simple request to the previous email address. 

MAINTENANCE AND SERVICING 

FAQ 

Summary of Contents for SYORS

Page 1: ...UM_152017 001A_En_SYORS USER MANUAL SYORS ...

Page 2: ... of advanced research from our engineering office test bench and many hours spent with our professional riders Our goal is to provide you with the best technologies and the greatest outdoor experience In order to make the most of your new acquisition please read this user manual carefully The mounting instructions and tips for use contained on it will allow you to make the most out of your suspens...

Page 3: ...rable to subsequent owners Wear and tear parts such as dust seals O ring bushings rear shock mounting hardware shafts threaded parts and bolts are not covered by this warranty TERMS This limited warranty is subject to legal jurisdiction or warranty rights of the original purchase country which will prevail if different from the terms herein listed LIMITS This limited warranty is conditioned on the...

Page 4: ...NT 5 OIL SETTINGS 7 MAINTENANCE AND SERVICING 9 FAQ 9 SETTINGS HISTORY 10 SERVICING NOTES 11 You will need the following tools for settings and maintenance Tool Symbol 2 mm hexagonal wrench 4 mm hexagonal wrench 11 mm open end wrench Ruler By hand Flat screwdriver TOOLS SUMMARY 11 ...

Page 5: ...e compatibility table available on the BOS suspension website download page www bos suspension com SAG verification The SAG is the amount of travel used by your suspension from your weight on the bike It is set by adjusting the spring preload BOS recommends a SAG percentage of 25 to 35 of total travel depending on your use and your riding style Enduro 25 30 DH 30 35 The bike manufacturer may also ...

Page 6: ...suspension any more extend the rear suspension to its full travel by pulling up the saddle and measure the distance between the bump stop and the rod guide This distance allows you to check the percentage of SAG The SYORS shock absorber for exclusive use in downhill mountain bike requires different spring preload depending on the geometry of each bike on the market To know the exactly preload to y...

Page 7: ...ning the screw clockwise on rolling terrain with big compressions and kickers It might be useful to soften the low speed compression by turning the screw counter clockwise on steep gradients High speed compression 11 mm black nut on head The high speed compression acts mainly on harsh hits jump landings rough sections It should be soft enough to get all the travel without bottoming out If on a giv...

Page 8: ...ngs between too fast and too slow Then always choose a setting in the faster part of that range for example the three last clicks counter clockwise on a range of nine Platform lever option Optionally your SYORS shock can be equipped with a locking lever to reduce the hydraulic flow in the compression system This will be useful during the pedalling period to avoid the work of the shock under the ef...

Page 9: ...l valving spring weight You can find all the information about standard settings for your bike in the chartlist on the BOS website bos suspension com Where can I purchase original stickers You can purchase these items through your approved BOS center or on the BOS store on bos suspension com I noticed some play between my shock and the frame what can I do Check that your mounting hardware is torqu...

Page 10: ...10 Date Place Track conditions Comp Rebound Comments LS HS SETTINGS HISTORY ...

Page 11: ...______ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _______________________________________________________________________________________ _________________________________________...

Page 12: ...ON 4 IMPASSE LEONCE COUTURE 31200 TOULOUSE Tel 33 0 534253366 Fax 33 0 534253360 sales bos suspension com www bos suspension com Facebook Page Bos Suspension User manual for BOS Suspension Mountain Bike SYORS ref UM_152017 001A_En_SYORS ...

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