- ATV A-Arms
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ATV A-Arms, Yamaha Raptor 250 2008-13, Long Travel Motorcross | Slicast® Pro Series +4" Wide
Yamaha Raptor 250 2008-13 Long Travel Pro Series Motorcross A-Arms
+4" Wide, +0" Forward
- Patented Slicast® (US Patent # US 7,568,711) Caster Adjustment - adjusts your caster independently from your camber with our Slicast® (US Patent # US 7,568,711) Cam
- Aftermarket Shock Location - Longer Shock is required
- Maximum Ground Clearance
- Pro Series
- Made from TIG Welded 4130 Chromoly Steel Tubing
- Greasable Needle Bearing and Seal Design
- Durable Tie Rods: Cut to Size and Powdercoated
- Nyloc Nuts and Loc Washers for Safety of Ball Joints
- Dust Caps: to keep dirt out and grease in
- Sealed Ball Joints
- Part # 255901
"I've ridden the rest, but now I ride the best. If you want to make your way to the front - Houser Racing products will take you there."
Johnny Gallagher, PRO GNCC Racer
The SLICAST® (US Patent # US 7,568,711) caster adjustment is the only caster adjustment on the market today that can be adjusted independently from the camber setting. The Aluminum SLICAST® (US Patent # US 7,568,711) Feature has 11 settings, each giving you 0.5 degrees of caster change. Each setting is labeled for ease of use. The SLICAST® (US Patent # US 7,568,711) rotates like a cam or bearing carrier, with the ball joint hole being on an eccentric. To adjust the SLICAST® (US Patent # US 7,568,711), simply untighten the upper ball joint jam nut 3/16” and pop out the SLICAST® (US Patent # US 7,568,711) CAM. Turn the cam to the desired rotation (caster setting) and press back in, tighten your jam nut, & ride with the new SLICAST® (US Patent # US 7,568,711) setting.
How does the Caster Setting affect the handling of your ATV?
The Caster Setting affects the handling of the ATV as it corners or goes in a straight line. Rotating the top ball joint toward the rear of the ATV makes the ATV handle better in a straight line. Rotating the top ball joint toward the front of the ATV, makes the ATV corner better.
What SLICAST® (US Patent # US 7,568,711) setting is best for me?
There is not an overall best setting. The SLICAST® (US Patent # US 7,568,711) Cam should be adjusted to reflect: your unique riding style, the terrain you are riding in, and the type of riding you are doing.
Maximum Ground Clearance
Additional clearance between the lower A-Arm and the ground. This is ideal for helping the rider avoid roots, ruts, rocks, and debris. Additional Ground Clearance prevents the Rider from getting stuck more often.The Lower A-Arms are bent in a way that they provide more clearance, protecting your A-Arms and Shocks from damage.
Shock Specifications: Yamaha Raptor 250 2008-13 Long Travel Pro Series Motorcross A-Arms
|Shock Free Length||16.8125"|
|Shock Compressed Length||12.1875"|
- Shock Free Length: The measurement of the shock (eyelet hole to eyelet hole) when the ATV is at a completely extended state. The measurement is taken with the ATV up on a stand without the shocks installed. Houser Racing recommends a 12" stand to achieve 10 1/2" of wheel travel.
- Shock Compressed Length: The measurement of the shock (eyelet hole to eyelet hole) when the ATV is at a completely compressed state. The measurement is taken when the ATV is 1 1/2" from the ground.
- Shock Stroke: The distance the internal shaft in the shock travels when compressed. This measurement is the free length minus the compressed length of the shock. Houser Racing recommends 5 1/2" of stroke for optimum shock tuning.
- Wheel Travel: The distance the wheels travel when the shock is compressed. This measurement is taken into account when the A-Arms are engineered. Houser Racing recommends 10 1/2" of wheel travel for all types of racing except Desert Racing , which we recommend 11 1/2" of Wheel Travel. When measuring for the shock Free Length - use a 12" Stand under the frame. When measuring for the shock Compressed Length - use a 1 1/2" block (2 x 4) under the frame. 12" Stand - 1 1/2" Black = 10 1/2" Wheel Travel.
How to properly measure for the correct length shocks:
Click here to watch our YouTube Video.
- Determine which amount of Wheel Travel is best for you. 10 1/2" is typical for MX and XC racing, 11 1/2" is typical for Desert Racing. We will measure for 10 1/2" in this demonstration.
- You will need a tape measure, 1 1/2" stand (2 x 4 boards), 12" stand, and an ATV.
- Install your A-Arms according to proper installation instructions. Leave the shocks off. Leave the tires on.
- Place your 1 1/2" stand under the ATV frame.
- Lower the ATV onto the stand, allowing the ATV to completely compress to the ground.
- Measure for your Compressed Shock Length - take a measurement from center of hole on the upper shock location to the center of hole on the lower shock location. Note this measurement.
- Raise the ATV up.
- Remove the 1 1/2" stand.
- Place the 12" stand under the ATV frame.
- Lower the ATV onto the stand, allowing the ATV to settle on the stand. The wheels should not be touching the ground.
- Measure for your Free Shock Length - take a measurement from center of hole on the upper shock location to the center of hole on the lower shock location. Note this measurement.
- Determine your stroke - the free length minus the compressed length equals the stroke.
The Pro-Series A-Arm Kit has increased performance, it is lightweight, durable, easy to install, and easy to maintain. It has great features like our Maximum Ground Clearance and SLICAST® (US Patent # US 7,568,711), plus it's upgradeable. All this for an affordable price. You are sure to blow away the competition with our Pro-Series A-Arm Kit.
- Comes Standard with Needle Bearings and Seals which are pressed into a replaceable Aluminum Housing
- Chrome Dust Covers with integrated seal
- Needle Bearing and Seal Assemblies are installed into our clamping style upper A-Arm
- This clamping style upper A-Arm allows you to replace your Needle Bearing Easily
- Comes standard with SLICAST® (US Patent # US 7,568,711) Caster Adjustment
- Aluminum SLICAST® (US Patent # US 7,568,711) Cam
- Made with lighterweight, stronger tubing 1 1/8" OD with a thinner wall
- 2 1/2 lbs lighter and 15% stronger than standard 1" tube
- Comes standard with Needle Bearings, Seals, and Chrome Dust Covers
- A-Arm tube is tapered, increasing strength
- Has a bent cross bar, which is both functional and cosmetic
- Maximum Ground Clearance to help avoid roots, ruts, rocks, and logs. Standard on most Cross Country and Motorcross widths.