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Custom A-arms
Designed against the load case you actually ride — your stance, travel and valving. Chromoly, CNC-cut, TIG welded, every joint inspected.
A-arm build process →
Mechanical Concepts · Southern Oregon
Custom A-arms, swingarms, chassis and suspension service — designed, cut, welded and tested by Mike Davis in our own shop. Now an authorized Bilstein dealer — Black Hawk Powersports for UTVs.
Authorized Bilstein dealer. Genuine Bilstein — including the Black Hawk Powersports UTV line for RZR, Maverick and Segway — sold by people who valve, dyno and race suspension every week. Pricing is by phone; fitment is confirmed by a human first.
Capabilities
Every component is custom-fabricated to your setup. There is no off-the-shelf A-arm here. Most-requested: A-arms.
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Designed against the load case you actually ride — your stance, travel and valving. Chromoly, CNC-cut, TIG welded, every joint inspected.
A-arm build process →02
Reinforcement, full custom chassis, extended swingarms for drag and long-travel. Round tube and sheet metal CAD design.
See what one changed →03
Shock rebuild, re-valve, spring rate optimization, dyno-tested. Bring us your shocks, or spec a new Bilstein Black Hawk set for your UTV.
Bilstein Black Hawk →04
Hybrid quads — different engine, different chassis, custom geometry, made to work. If you can describe it, we can probably build it.
Start a build →One-off projects welcome. Every build starts with a scheduled consult call with Mike — refundable deposit, applied to the build.
Shocks — three lanes
We sell three shock lines and they don’t overlap. Find your machine, then find your lane — or call and Mike will sort it in two minutes.
UTV / side-by-side
Bilstein’s UTV line — direct-fit, 4-way adjustable coilover corner modules for RZR, Maverick and Segway. We’re an authorized dealer. No Black Hawk line exists for quads.
See fitments & specs →Quad & ATV · our own line
Built from scratch and fitted to your quad and your rider weight — there’s no fitment list because there’s no stock part. Three tiers: 2 trail, 3 piggyback, 4 race.
Start a build to your quad →Quad & ATV · factory replacement
Stock machine, worn shocks, want it back the way it left the factory? We source OEM replacements for Honda, Yamaha, Polaris, Can-Am, Kawasaki and Suzuki.
Call for pricing →Authorized Bilstein dealer
Bilstein’s UTV line — ZoneControl CR position-sensitive damping, 4-way adjustable, direct-fit coilover corner modules. Tell us the machine and the year; we confirm the fitment before anything is ordered.
Polaris
Pro S 4 2025 · Turbo R 4 2022–2024
Black Hawk Powersports front corner module · part no. 41-352106 · sold per corner
Direct fit — Premium, Sport and Ultimate trims
Can-Am
X3 2-seat · X3 Max · Maverick R
Black Hawk Powersports coilover set · 41-324998 / 41-330579 / 41-325001 / 41-330623 · four corners
Built to order — ask for current lead time
Segway
2026 · newest machine in the catalog
Black Hawk Powersports corner modules · part numbers awaiting distributor feed
Listing opens once we’ve fitted one in the shop
Not in the Black Hawk catalog: Honda Talon and Yamaha YXZ1000R — and there is no Black Hawk line for quads. If you ride one of those, we’ll re-valve or rebuild what’s on it instead. Say so on the phone and we’ll tell you straight.
Pricing shown on request while dealer terms are confirmed. Product photography will be ours, shot in the shop — layout is final.
Case study · Sand
“The bike feels like it’s on rails.”
With the stock swingarm I couldn’t really push too hard or the rear end would get loose and unpredictable. Now I can push the rear end a lot harder. The only change I made is the swingarm. I’m over 50 hours in on it now and not one issue.
— Corey Blakesley · sand rider · same suspension, wheels, engine, tires and rider
Start here
Schedule a consult. We’ll measure your setup, talk through your goals, and put together a build that works. Or just call — Mike answers the shop phone.