Lone Star Racing ATV & UTV

Yamaha YFZ450R High Clearance XC A-Arms

Regular price $1,650.00 USD
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Arm Color: Raw
LSR Badge Color: Raw Stainless Steel
Geometry: Yamaha

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Yamaha YFZ450R High Clearance XC A-Arms
$1,650.00 USD
Raw / Raw Stainle...
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Yamaha YFZ450R High Clearance XC A-Arms


Description

The Lone Star Racing High Clearance XC A-Arms for the Yamaha YFZ450R represent the pinnacle of cross-country suspension engineering, built from the ground up using direct feedback from top-level racers. Designed specifically for riders who demand maximum ground clearance and trail-ready durability, these arms tackle the most punishing terrain without compromise. Every element has been reconsidered and improved - from the fully boxed lower arm and shock mount to the upgraded polyurethane bushing system - making them the most capable XC a-arms available for the YFZ450R.

Whether you're running tight single-track or hauling through rocky open terrain, these arms keep your shock protected and your geometry dialed. The XC-specific width of -1 1/8" narrower per side with zero forward placement preserves familiar handling characteristics, meaning riders switching from Houser arms or the old-style DC-Pro's won't need to retune their shocks. Built from 4130 Chromoly and fully TIG welded, this is a lifetime investment in your machine's performance.


Key Features

  • XC Geometry (-1 1/8" per side, zero forward placement): Maintains the proven cross-country width with no forward placement, so existing shock tuning carries over without adjustment.
  • Fully Boxed-In High Clearance Lower Arm: Completely redesigned lower arm features a boxed shock mount and high clearance bend for maximum ground clearance and protection on the trail.
  • Greasable Polyurethane Bushings: Replaces old pivot bearings and Delrin bushings with long-lasting, greasable poly bushings that extend service intervals and add compliance to absorb trail impacts.
  • 4130 Chromoly Construction: Arms are built from premium 4130 Chromoly steel and are completely TIG welded for superior strength without added weight.
  • Same Weight as Previous Arms: Weight is identical to the old-style arms, meaning you gain significant strength and clearance improvements at zero weight penalty.
  • Universal Aftermarket Shock Compatibility: Shock mount is designed with clearance for all aftermarket shocks - requires a 20" extended-length shock.
  • Caster Corrector Bracket & Spacers Included: Comes with the proven caster corrector bracket and caster spacers for proper front-end alignment right out of the box.
  • Lower Shock Bolt Dust Caps: New dust caps on the lower shock bolt prevent mud and debris from packing inside the mount, reducing maintenance and wear.
  • Compatible with Houser Arm Shocks: Riders transitioning from Houser arms can bolt up their existing shocks without modification.
  • Lone Star Racing (LSR) Brand: Designed and built by one of the most respected names in ATV racing suspension - trusted by elite XC and GNCC-level competitors.

Geometry Options & Which to Choose

  • Yamaha Geometry: Retains stock Yamaha YFZ450R spindle geometry for a direct, familiar fit. Best for riders running stock or Yamaha-spec spindles who want a straightforward upgrade without additional spindle modifications.
  • LTR Geometry: Configured to work with LTR-style spindles, ideal for builds already running LTR spindles or riders looking to maximize compatibility with LTR front-end setups for added adjustability.

What's Included

  • High Clearance XC A-Arm set (upper and lower)
  • Caster corrector bracket
  • Caster spacers
  • Lower shock bolt dust caps

Why You'll Love It

These arms weren't designed in a vacuum - they were built by listening to elite racers and everyday riders, then engineering solutions to every complaint. The result is a set of XC a-arms that genuinely outperforms anything else on the market for the YFZ450R. The greasable polyurethane bushing system means you'll spend more time riding and less time wrenching, and the fully boxed lower shock mount gives you peace of mind on rocks, roots, and ruts that would punish lesser arms. No shock retuning, no weight gain, no compromises - just a stronger, smarter, better-protected front end. Trusted by top XC and cross-country racers, these arms are the last upgrade your YFZ450R front suspension will ever need.


Product Specifications

View Product Specs
Fitment Yamaha YFZ450R
Material 4130 Chromoly Steel
Welding Fully TIG welded
XC Width -1 1/8" narrower per side
Forward Placement None (zero forward placement)
Required Shock Length 20" extended length
Bushing Type Greasable Polyurethane
Geometry Options Yamaha, LTR
Arm Color Options Raw, Clear Coat, Semi-Gloss Black, Custom Color
LSR Badge Color Options Raw Stainless Steel, Gloss Black
Assembly Required Yes - installation required; instructions included
Shipping Ships standard (not freight); lead time may be up to 10+ weeks if not in stock

FAQ

Do I need to retune my shocks when switching to these arms?

No - the XC geometry on these arms matches the old-style DC-Pro's exactly, with the same -1 1/8" width per side and zero forward placement. Riders switching from DC-Pro's or Houser arms can reuse their existing shocks without any retuning required.

What shock length do these arms require?

These arms require a 20" extended-length shock. The shock mount is designed with clearance for all aftermarket shocks of this length, so you have full flexibility in your shock choice.

What is the difference between Yamaha and LTR geometry?

The Yamaha geometry option is set up for stock YFZ450R spindles, making it the straightforward choice for most builds. The LTR geometry option is configured for LTR-style spindles, which is ideal for riders already running or planning to run LTR spindles on their front end.

Why were Delrin bushings and pivot bearings replaced with polyurethane?

Greasable polyurethane bushings last significantly longer than Delrin bushings or standard pivot bearings, extending the time between service intervals. They also offer a small amount of flex and compliance, which helps absorb trail vibration and impacts before they transfer to the rider - a real advantage in cross-country racing conditions.

How long is the lead time if the product is out of stock?

Lead times can be 10 weeks or more when the product is not immediately available. If your build is time-sensitive, it is strongly recommended to call ahead and confirm stock or estimated availability before placing your order.

Can I get these arms in a custom color?

Yes - a Custom Color option is available. Simply select "Custom Color" when ordering and specify your desired color in the order notes. Custom color orders are priced at $1,700.00 and may have additional lead time.

Product specifications table
Specification name Specification Value

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