KTM XC4 BIKE RANGE EVOLUTION

2008 KTM XC4 Models

2008 saw the introduction of a radically new / redesigned 4 stroke model range from KTM for off road riding. Designated XC4 engine similar to 250 and 450/505 SXF models but with single overhead cam to replace the RFS models from earlier years. In addition these new models incorporated the new KTM frame design first introduced in 2007 on SX models.

Kick and electric start

450/530 EXC-R

450/530 XCF-W

Performance Upgrades

JD jetting kit

De-smog including muffler de restriction

14/48 gearing with hard parts / supersprox rear sprocket

Hard Parts fuel screw

F2 scram manifold and bulls eye carb divider

Removed final screen from silencer

Suspension Upgrades

Enduro Engineering stiffer fork and shock springs (.48 and 8.4 respectively)

Trail Tricks stage 1 suspension revalve

F2 unshocks front and rear

Hard Parts fork bleeders

Other Changes/Upgrades

Baja Designs rear light with shorter modified plate holder

Sicass rear LED blinkers and smaller light switch

Dirt Tricks cam chain tensioner

F2 magnetic oil fillers and float bowl plug

Hard Parts rear brake reservoir extender and quick release rear brake pin

Enduro Engineering axle pullers

Good Points

Chain, sprockets, Brake pads, Bearings,

Reliability

Bad Points

Oil consumption

Cam chain tensioner (fixed 2010)

Starting (Cam/ADC fixed later)

Suspension (2009 much better)

Rear blinkers and light/number plate mount

Airbox sealing (improved 2010 a little)

Handlebar clutter, big light switch

Gearbox

2009

More information on XC4 evolution of 2008 and onwards range of KTM models can be

2010

More information

Champions edition 2009.5 model, same as 2009 EXC’s but with different graphics and 2010 VIN number.

CHASSIS – All Models XC-W & EXC

» New front Brembo brake caliper (like 2009 SX), new TOYO B153 brake pads, Floating 2-piston caliper with new brake master cylinder and new TOYO pads, Improved brake performance, less lever force, more progressive feel

» Modified Air Box With New Design TwinAir Filter, Improved air filter protection, New shape in the front to reduce dirt or water collection and a slight wall in the back to avoid water coming into the filter, New TwinAir Filter designed for the new airbox

» New suspension valving, PDS with new needle design, Similar needle as SX/XC from 2009 – provides damping slightly earlier for more progressive feel through the stroke

» New DID 520 VT2 X-ring chain instead of Regina, Improved durability, less friction

» New Lighter EXCEL rims, 100 g lighter for less unsprung weight

» New Renthal Hand Grips

» New Graphics

» 400 XC-W & 450/530 XC-W Six Days & 450/530 EXC New Frame Design (same as 450 SX-F), Frame Is Welded To The Steering Head 10mm Lower Than 2009, Rotates the frame and engine forward slightly - Lowers the tank and seating position, Improves the weight balance, provides less deflection on the front end, better control of front wheel, lighter feeling

» New Lower Handlebar, Works in conjunction with the new frame

ENGINE – Model Specific – Four-Stroke

400 XC-W

» Optimized decompressor spring, Easier starting

400 XC-W & 450/530 XC-W Six Days & 450/530 EXC

» Reinforced gear box (1,2,5,6 idler gears), Improved durability

» Reworked chain adjuster & clamping rail, Better tension on timing chain, noise reduction

530 XC-W Six Days & EXC

» New camshaft timing, Smoother power delivery, improved rideability, optimized power band

» New ignition timing, Better combustion and performance

» 450 & 530 XC-W Six Days Edition

• Limited Edition Portugal Six Days Graphics

•Headlight and Tail Light

•Quick Release Plastic Skid Plate

•Fork Bleeder Valves

• Seat Including Race Logo and Card Holder

•Machined Triple Clamps

•Handlebar Protector

•Rear Brake Retaining Pin

•Front Axle Puller

•Radiator Cooling fan

•Stealth Rear Sprocket - Orange

•Black Fuel Tank

•Hand Guards

450 XC-W Champions Edition

• Limited Edition Kini Red Bull Graphics

•Headlight and Tail Light

•Quick Release Plastic Skid Plate

•Fork Bleeder Valves

•Rear Brake Retaining Pin

•Front Axle Pull

•Billet Fuel Cap

• Orange Anodized Oil Filter Cover, Clutch & Front/Rear Brake Master Cylinder Cover

» 450 & 530 EXC Champions Edition

• Limited Edition Kini Red Bull Graphics

• Quick Release Plastic Skid Plate

•Fork Bleeder Valves

•Rear Brake Retaining Pin

•Front Axle Pull

•Billet Fuel Cap

• Orange Anodized Oil Filter Cover, Clutch & Front/Rear Brake Master Cylinder Cover

2011

Transparent tank, Fuel level visible

New colours & graphics

Hand guards, Protection against stones etc.

Handlebar protector, Protection for chest and face

400/450/530 EXC New material for valve spring retainers, better reliability

400/530 EXC New timing of automatic de-compressor, improved starting

6 Days Models

» Frame powder coated in ORANGE

» Engine protector for all models

» Radiator fan for all 4-strokes

» CNC machined triple clamps, (black anodised)

» Seat cover with logo and card pocket

» Stealth rear sprocket

» Axle puller

» Quick-change rear brake pad pin

» Breather valves for front fork

» Exclusive Six days decals

Comparison

The following table shows a comparison

2008

2009

2010

2011