Name: Alpinestars A-4 Plasma Roost Guard - Black/Red/White
Brand: Alpinestars
SKU: 2701-1507
Price: 189.95 USD
Availability: InStock

Alpinestars A-4 Plasma Roost Guard - Black/Red/White

$ 189.95

No Sales Tax! Except CA | 🚚 Free Shipping on orders over $50

In stock, ready to ship
Backordered, shipping soon

Size

M/L

XL/2XL

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We are an Authorized Dealer for all the Brands that we sell. Below are the links to our distributors who authorize us to carry what we sell.

Helmet House is our distributor for...

SHOEI - HJC - ALPINESTARS - CORTECH - TOURMASTER - SENA - SIDI

https://helmethouse.com/dealers/4955008-motor-psycho-sport.html

Parts Unlimited - Drag Specialties - LeMans Corp is our distributor for...

ARAI - ALPINESTARS - THOR - ICON - MOOSE RACING - Z1R - SENA - DUNLOP - METZELER - FMF - MOTUL - MAXIMA - RENTHAL - YOSHIMURA - TWIN AIR - ODI - 100% - SPECIALIZED - CRANKBROTHERS - MICHELIN - AGV - FACTORY EFFEX - AFX - AND MORE!

https://www.parts-unlimited.com/find-dealer (Type in 91320 for our zip code)

Parts Unlimited is the largest powersports distributor in the United States. They are now the exclusive distributor for Arai Helmets in the U.S.. Their house brands are Icon, Moose, Thor, AMS, Z1R, Arctiva and more.

WPS - Western Power Sports is our distributor for...

ALPINESTARS MX - GAERNE - FLY RACING - ODI - FMF - SCORPION - MIKA METALS - HIGHWAY 21

https://www.wps-inc.com/dealer-locator?distance=25&location=91320

Western Power Sports or WPS is the faster growing distributor currently. Their house brands are Fly Racing and Highway 21.

Turn14 Distribution is our distributor for...

ANSWER - MSR - PRO TAPER - FMF - GAERNE - ACERBIS - ATHENA - DRAGONFIRE - CYCRA - EVS - FIRSTGEAR - SPEED & STRENGTH - GIANT LOOP - RIVER ROAD - USWE - VANCE AND HINES - WISECO

https://www.turn14.com/about

Turn14's house brands are Answer, MSR, Pro Taper, Renthal, Vance & Hines, Firstgear, and Speed & Strength.

O'NEAL & OGIO POWERSPORTS is our distributor for...

O'Neal - OGIO

O'neal doesn't have a dealer locator but we buy direct from O'Neal and also use them for OGIO Powersports as they are the U.S. distributor for OGIO POWERSPORTS. OGIO is owned by Callaway Golf.

Bell Helmets Dealer Locator

https://troyleedesigns.com/pages/store-locator (Type in 91320 Zip Code)

Features

Anatomically profiled for all forms of off-road riding
Features a semi-rigid thermoplastic polyhedron design chest protector and a Nucleon Plasma back protector that are engineered to be lightweight, breathable, comfortable, adaptive, and protective
Key Features
Highly flexible Nucleon Plasma Back Protector constructed from viscoelastic material engineered from biobased polymers and formed into a structure that is pliable in all directions while maintaining the ability to dissipate impact energies
Lightweight and highly ventilated, this protector offers strong impact force dispersion and absorption while ensuring maximum coverage areas in all riding positions
Lightweight and ultra-vented chest armor
The chest outer shell’s design achieves the desired structural strength and imposed load performance when compared to flat or unfaceted surfaces
The over-injected flexible side wings of the chest protector follows the body's contours for comfort and freedom of movement
Optional Race Kit — Engineered to be compatible with the Nucleon Plasma Extended Roost Coverage kit which includes Upper and Lower Chest Extensions, and an additional Y-Strap System to use the A-4 Chest without the back protector
Features highly perforated, adjustable, and detachable rib and shoulder padding for additional rib and shoulder coverage against roost and impact
Construction
Equipped with adjustable shoulder and side straps for an optimized performance fit
Removable soft tactile thermoformed shoulder padding for enhanced rider comfort
The lining on the back protector offers a soft tactile feeling against the skin while maintaining the integral structure of the protectors and reducing the risk of any material tearing
The lining is ribbed for superior airflow while also reducing the amount of material that is in contact with the skin
The perforated 3D mesh chassis also offers additional protection against tire roost
Bionic Neck Support compatibility via the BNS shoulder pull tabs
USDA certified bio-based eco-friendly and sustainable impact absorbing material

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Let customers speak for us

from 1177 reviews

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Helmet arrived in excellent condition with all accessories great price very pleased with this purchase

Tom mcGuffie

09/16/2026

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Alpine stars A6

A passed on this because it looked too bulky, but after trying some other brands, gave it a go. Turns out this is pretty darn good. Lots of air flow ( I ride in hot weather) & protection is 1st rate. I wished I picked this first. PS, unfortunately I fall a lot & this thing has done its job again & again w/o getting any damage.

Steve Baum

09/15/2026

Perfect fit

Chris

09/14/2026

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Really glad I came to this store. It was my first time ordering anything from here. I ordered this helmet and received it 3 days later. I checked the manufacturer label when I was installing a cardo and this helmet is only 4 months old. I couldn’t find anything wrong with this helmet when I received it, it seemed brand new. I’ve been riding with it for a week now and am very happy so far. I will definitely come back to this shop in the future when I’m looking for another helmet again

Matt

09/13/2026

pretttyyyy close to new!

i was a little nervous about buying an open-box helmet at first, but when it arrived, it was basically like new!

if buying online, a little hack or tip is you can try helmets locally at whatever store near you before purchasing online!!

The only tiny thing I noticed was that the stickers looked like it had been peeled off and put back on, but that was nothing a little alcohol or heat for the sticker residue couldn’t fix. The helmet itself was in perfect condition and came with the helmet bag and accessories, including the Pinlock insert and lubricant. Still smells like new helmet smell 😆
liked that they also put it as if it is new in the box!

Motor Psycho Sport was also super responsive, friendly, and easy to deal with throughout the whole process. I’m on the East Coast, and shipping from California didn’t take long at all. they also shipped really fast/item arrived at shipper quickly

If you’re considering buying an open-box or regular helmet from them, I definitely recommend it. Amazing family-owned business and a great experience overall!!!

Allissa Nguyen

09/11/2026

Shoei RF-1400 Origami 2 Helmet - TC-5 - Size Small - USED / OPEN BOX

Excellent Helmet.

But then again, Shoei helmets are the only ones I’ve used for many years, including roadracing activities. One thing about Shoei is the helmet sizing, only one reason I stick to the brand. This purchase was an open box, no flaws noted. Perfect.

Dan

09/10/2026

Shoei RF-1400 Helmet - Matte Black - Size XL - USED / OPEN BOX

Loved it!

Its beautiful! Great quality and air flow. Very comfortable i got the XL. My coworker said "damn that helmet gots aura"

Marcos Salazar

5 stars

Igor Pyatka (pyatkigo)

Fits Great

Accidentally ordered a size larger than I normally wear, but actually fits great. Everything works smoothly and is easy to adjust while riding.

Jerald Christophersen

09/08/2026

HJC i80 ROKI ADVENTURE MODULAR HELMET - MC-47 SF GREEN/BLACK/ORANGE

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Finally have a helmet fit snug with no pressure points. Can’t believe how quiet this helmet is compared to my old AGV. No issues under the speed limits…. Love the visor w/ Transition and how the visor locks closed, another reason for the quieter wind noise. Highly recommended, best helmet I’ve ever tried - not even close.

Charles Beasley

09/07/2026