2013 Motocross Bike Buyers Guide

Over the course of the next few pages, your argument that last year’s model bike is just as competitive as ever will lose its believability. With countless improvements made to nearly every model, along with the release of two all-new bikes, the 2013 releases show the rate at which our sport is advancing. The most standout bike for next year is easily Honda’s CRF450R, with its all-new aluminum frame, Kayaba PSF (Pneumatic Spring Fork) air fork, and dual exhaust. Not to be outdone is KTM, with their specially crafted 450SX-F that Ryan Dungey piloted to their first US 450 title.
The Honda is not the only model to feature Kayaba’s PSF fork, as Kawasaki’s KX450F is also outfitted with the compressed air units. After making its debut on last year’s KX250F, the Showa Single Function Fork has spread onto both of Suzuki’s RM-Zs, while KTM has continued to revalve their WP units to suit the American market. With all full-size machines running 11 to 12 inches of suspension travel, they are a far cry from the bikes of yesteryear.
Those longing for the nostalgia are not forgotten, as two-strokes are still carried in Yamaha, Husqvarna, and KTM’s lines. The lack of change to the six screamers is a sore subject for some, yet we look at it this way: why mess with a good thing? As long as we continue to hear and smell the pre-mix burners, you will not hear a complaint from us.
As we continue to progress through this decade, one cannot help but think about the flying cars and self-tying shoes we were “promised.” Sadly, this is not a Hanna-Barbera-Spielberg creation and we are still bound to our dreary, simple duties. However, knowing you have the chance to swing a leg over any of the 2013 race bikes should be enough to make you realize how good we have it.

125 TWO-STROKES

KTM 125 SX

$6,449
Displacement – 124.8 cc
Engine Type – Single cylinder, two-stroke
Claimed Dry Weight – 200.2 lbs.
Bore X Stroke – 54 x 54.5 mm
Compression Ratio – N/A
Carburetion – Keihin PWK 38S AG
Ignition – Kokusan
Transmission – Six-speed multi-disc clutch
Fuel Capacity – 1.98 gal.
Frame – Chromoly central tube
Wheelbase – 58.27 in.
Rake – 63.5 degrees
Seat Height – 39.06 in.
Tires – (F) 80/100-21, (R) 100/90-19
Suspension Travel – (F) 11.81 in., (R) 12.99 in.
Front Brake – 260 mm disc
Rear Brake – 220 mm disc
Final Drive – Chain
Handlebar – Tapered Renthal Aluminum
Yamaha YZ125 
$6,290
Displacement – 124 cc
Engine Type – Liquid-cooled two-stroke, reed-valve inducted
Curb Weight – 207 lbs.
Bore X Stroke – 54.0 x 54.5 mm
Compression Ratio – 10.7:1
Carburetion – Mikuni TMX 38
Ignition – C.D.I.
Transmission – Constant-mesh six-speed; multi-plate wet clutch
Fuel Capacity – 2.1 gal.
Frame – Aluminum frame
Wheelbase – 56.8 in.
Rake – N/A
Seat Height – 39.3
Tires – (F) 80/100-21, (R) 100/90-19
Suspension Travel – (F) 11.8 in., (R) 12.4 in.
Front Brake – Hydraulic single disc brake, 250 mm
Rear Brake – Hydraulic single disc brake, 245 mm
Final Drive – Chain
Handlebar – Aluminum Pro Taper
Husqvarna CR125 
$6,299
Displacement – 124 cc
Engine Type – Two-stroke power valve with mechanical control
Curb Weight – 207.2 lbs.
Bore X Stroke – 54 x 54.5 mm
Compression Ratio – 8.8:1
Carburetion – Mikuni TMX38
Ignition – Electronic with Variable Advance
Transmission – Six-speed
Fuel Capacity – 1.85 gal.
Frame – Steel
Wheelbase – 57.9 in.
Rake – 26.5 degrees
Seat Height – 38.8 in.
Tires – (F) 80/100-21, (R) 100/90-19
Suspension Travel – (F) 11.8 in., (R) 11.6 in.
Front Brake – 260 mm disc brake
Rear Brake – 240 mm disc brake
Final Drive – Chain
Handlebar – Aluminum
KTM 150 SX 

$6,549
Displacement – 143.6 cc
Engine Type – single-cylinder, two-stroke
Claimed Dry Weight – 200.2 lbs.
Bore X Stroke – 56 x 58.4 mm
Compression Ratio – N/A
Carburetion – Keihin PWK 38S AG
Ignition – Kokusan
Transmission – Six-speed multi-disc clutch
Fuel Capacity – 1.98 gal.
Frame – Chromoly central tube
Wheelbase – 58.27 in.
Rake – 63.5 degrees
Seat Height – 39.06 in.
Tires – (F) 80/100-21, (R) 100/90-19
Suspension Travel – (F) 11.81 in., (R) 12.99 in.
Front Brake – 260 mm disc brake
Rear Brake – 220 mm disc brake
Final Drive – Chain
Handlebar – Tapered Renthal Aluminum
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