buy a complete Ohlins Pro Pilot A1 Kit! (two 48S RXF forks and one TTx Flow Shock  sprung and done!)



Our state is the home of  KTM’s 8-Time AMA National Enduro Champion, 3-Time ISDE Gold Medalist, and the XC-1 Atlantic grand Prix Champion among many others including many AMA multi time National Number Motocross racers, West Coast Supercross Champion, and many Adventure Rides including the Pine Barrons 500.


We Know Dirt!

2016_KTM_300_XCW_Sixdays_Aaron Ginn Bakersfield CAL


(2016) Aaron G.~ 2016 Ktm 300XC-W Six Days BAKERSFIELD, CALIFORNIA


WP_Logo_large-300x93WP the Best 4CS Mods Forks 4CS_S




Many fork options from the most basic mods to full replacement fork is available,


We have seen plenty of 4CS! and many 2016’s already (see below…)

Our Leader


You can mod the WP 4CS forks like some people do or…


replace the whole guts with Ohlins TTX Cartridges that are a twin wall design like found in their whole Ohlins fork or…

replace the whole fork with  Ohlins 48 RXF  that slips right into you stock triple clamps and uses all the same stock front wheel, axle, and lower plastic guards.


See below for more info on each~



WP 4CS 1 Ohlins A kit KTM TTx Fork Kit IMG_3436





The Wp Black Anodizing is poor quality, the caps threads and other areas is common to wear marks and flaking off!

The Rebound Rods and both Red and Silver Cones Shown are also common to significant wear marks and galling from use, also when bottoming frequently this is only worse do to all the small parts flex and other issues!.


WP 4CS Fork Mods


2015 and 2016 Newer  KTM, Husqvarna,  and Others.


WP 4CS Mods 2 IMG_3450


WP 4CS Fork Mods



KTM WP 4CS Fork Mods Ohlins TTX Huck Valve IMG_3492



WP 4CS Fork Shim, mid Valve, bottoming control valving, revalving and mods.



KTM WP 4CS Cone Forks Kit Mods Ohlins IMG_3453


4CS WP  Fork Top Cartridge refiller  hole bleed.



KTMCS WP Valve IMG_3445


Note the wear marks and galling that are common to the Red Cones and fork caps anodizing that flakes off and is poor quality.



Wp 4CS Fork Kit Rebound Cone Fork and  Bottoming control open cone.


Shown above is 29mm Inner Top out Spring (noted for checking primary fork spring preload) see below…



WP 4CS Huck Valve A KIT TTx Ohlins


Note the wear on the Wp anodizing  off the fork cap do to poor quality and flex that is common.

WP 4CS Compression Cone and open hydraulic cup.



WP KTM 4CS Fork Mods IMG_3451


WP4CS micro bleeder  top cartridge both compression and rebound side.



WP 4CS Cone Valve Fork mods


4CS WP Fork , reminder Cone to to open port, 20mm primary 4 port piston with 8mm rod charge, directional check valves separate top cap rebound and compression external adjusters.


Both similar metered rod displacement volume and bottoming shim control.



Wp KTM 4cs Cone Valve IMG_3467


WP 4CS Fork anti bottoming control rebound side with directional low speed check valve.



KTM WP 4cs Fork Mods Ohlins TTx A_Kit IMG_3496


4CS WP 20mm four port piston and 8mm rod charge, see below for needle and seat low speed bypass.



KTM WP 4CS Huck Cone Valve Fork


WP 4CS Cartridge end cone,  blue oring seal ring bottoms on cartridge end when assembled, fluid charge created passes through end cartridge valving and cartridge though 6x holes (shown only two in pic) and 28mm 3 port piston.



Wp 4CS Adjustment Valve Seat bypass Huck


Shown low speed bypass adjusting needle for seats.



WP 4CS Fork Seled CArtridge Huck


WP 4CS  Sealed Chamber and lower leg.



WP 4CS Huck Cone Revalve


4CS Rebound end cone and tapered anti bottoming device.



Wp 4CS Top cartirdge Sealed Huck


WP 4CS seal  8mm rod charge.



WP 4CS Fork Spring Preload 29mm inner Top Out Sprg


WP Fork main spring installed with 29mm inner top out spring.


WP 4CS Preload with Top Out Spring 29mm


That much tunable with 29mm inner top out spring not shown.







WP Tech Tip:

When your Rebound RED Adjuster Goes blowing Off and you gets lost, the cartridge needle valve seal needs to be replaced.

Shown by blowing air through that little hole to see if inner rebound rod launches across the room!, then of before this happens reminder to check or replace that seal under there.




WP Ohlins 4CS

Cartridge Kit MX2010 


Ohlins Wp 4CS Cartridge TTx and Spring Kits
(To Replace everything inside your Wp Forks!)


Very popular option with excellent results featuring TTX Twin wall design.


WP Ohlins 4CS

Cartridge Kit MX2010


Wp Fork with popular Ohlins TTx Cartridges
(see  Ttx Cartridge page for more info)


WP Ohlins 4CS


Unlike traditional fork Cartridges this Ohlins TTx Twin Wall design is very unique similar to TTx Ohlins Shocks with twin Piston and twin tube design with more directional fluid flow, less cavitation, and more equal pressure balance through shims and pistons.


WP Ohlins 4CS



These Struts have a tunable internal Nitrogen pressurized floating Twin piston (Shown in background) and True Twin wall TTx Design features within each strut for ultimate improvement not found with a basic single tube cartridges found on all OEM forks.

This Unique design through completely different engineering than standard forks offers a much improved and more consistent feel with less fluid cavitation.



WP Ohlins 4CS







WP Ohlins 4CS



FGKT1696 Ohlins Fork 48 RXF


Ohlins has a whole fork available to replace the WP 4CS,


The 48RXF Ohlins Full Fork, slips right into your standard triple clamps and uses stock everything else like wheel, axle, fork plastic guards.



WP Ohlins 4CS


2016 Ktm Fork Bottoms FGKT1696 Ohlins



Ohlins 48RXF bottoms (these are 2016 KTM SX-F , XC-F and Husqvarna).


WP Ohlins 4CS