This is the strongest ball joint Keller makes for the Kawasaki Teryx, and it will not fit a stock A-arm. The Mega uses a substantially larger housing and stud than the standard Keller joint — so much larger that the A-arm has to be machined to accept it. On a platform that has been in service since 2008 and gets ridden in mud, rock and rut, that extra material goes exactly where the failures happen.
Read this before ordering: Mega ball joints require modification of your A-arms. If your arms are stock and you do not intend to have them machined, the standard Keller Teryx joint threads straight in and is the correct part for you.
Key Features
- Oversized housing and stud — significantly more material than the standard Keller joint
- Two-piece threaded design, no OEM snap ring
- 4340 hardened chromoly steel housings and studs
- Adjustable, greaseable and rebuildable
- Covers six Teryx variants from 2008 to current
- Requires machined A-arms — not a bolt-in upgrade
- Limited lifetime warranty against manufacturing defects
- Made in USA
Built To Solve: Repeat Ball Joint Failure On A Worked Teryx
- Standard-size joints that keep failing on a machine ridden hard in technical terrain
- Snap ring shearing and letting the joint separate from the A-arm
- Clunking or knocking from the front end over rocks and rutted trail
- Play in the wheel when rocked top-to-bottom on a jack
- Big-tire and lifted builds that outgrow a stock-size joint
- Owners who have already fitted heavy-duty joints and broken those too
Best For: Built Teryx Machines With Modified A-Arms
- Teryx 750, 800 and Teryx S owners already running aftermarket or machined arms
- Mud, rock and technical-trail riders working the front end hard
- Machines running oversized tires and a lift
- Four-seat Teryx owners putting more mass through the same front end
- Anyone having A-arms machined anyway and wanting the strongest joint available while it is apart
If your A-arms are stock, order the standard Keller Teryx ball joints instead — same design principle, no machining required. This listing does not cover the Teryx KRX 1000.
Specifications
- Material: 4340 hardened chromoly steel, stud and housing
- Design: two-piece threaded housing, no snap ring
- Housing: oversized Mega, larger than the standard Keller joint
- Serviceability: adjustable, greaseable and rebuildable
- A-arm modification: REQUIRED
- Positions: one joint serves both upper and lower on this platform
- Warranty: limited lifetime against manufacturing defects, original purchaser
- Manufacturer Part Number: BJKM-K-MTUL (one joint), BJKM-K-MTUL-K-2 (two joints), BJKM-K-MTUL-K-4 (four joints)
Fitment
- Kawasaki Teryx 750: 2008-2013
- Kawasaki Teryx 4 750: 2012-2013
- Kawasaki Teryx 800: 2014 onward
- Kawasaki Teryx 4 800: 2014 onward
- Kawasaki Teryx S: 2021 onward
- Kawasaki Teryx 4 S: 2021 onward
NOTE: Mega ball joints require modification of your A-arms. One part covers the whole non-KRX Teryx family, two-seat and four-seat. The Teryx KRX 1000 is not covered. Fitment is not guaranteed on applications not listed above.
FAQ
What actually has to be modified on the A-arm?
The Mega housing is larger than the bore a factory arm provides, so the arm has to be machined to accept it. This is permanent — an arm cut for a Mega will not go back to a standard joint. Have it done by a shop that has cut arms for these before.
Should I buy the Mega or the standard Keller joint?
If your A-arms are stock and staying stock, buy the standard — it threads in as supplied and solves the snap-ring failure just as completely. The Mega is for machines already running machined or aftermarket arms, or ones where the standard joint has failed under load.
Will these fit my Teryx KRX 1000?
No. The KRX is a different machine and is not covered by this part.
Does one Mega joint really cover the 750, the 800 and the Teryx S?
Yes. SuperATV supplies a single Mega part across the whole non-KRX Teryx family, two-seat and four-seat, from 2008 through current.
Do I need different joints for the upper and lower positions?
No. The same Mega joint serves both positions, so choose one, two, or a set of four for a complete front end.
Can these be rebuilt?
Yes. They grease and adjust, and the Keller ball joint rebuild kit for Kawasaki carries a BJKM-K-MTUL option specifically for this joint.
Why Keller
Todd Keller designed the two-piece threaded ball joint to fix the one part of a stock front end that keeps failing, and SuperATV now builds and backs the line. The Mega is what happens when that design is taken as far as the geometry allows: the same threaded housing and chromoly stud, scaled up past the point a factory A-arm can accept.
Before You Order
Confirm your A-arms are machined for Mega housings, or that you are having that done, and confirm you are on a standard Teryx rather than a KRX. If your arms are stock, the standard Keller Teryx joint is the right part. If the boots are torn but the joints are sound, the Keller boot replacement kit covers this Mega. If the joints are worn but the housings are good, the BJKM-K-MTUL option in the Keller rebuild kit for Kawasaki services them.
Installation Video
Official SuperATV installation walkthrough with Todd Keller: How To Install Keller Ball Joints
