Atomik MM450

mm450 rock blast
YEAR: 2012
SCALE: 1/4
WEBSITE: Not available
STATUS: Discontinued (2014)
SPECS: Length= 21.57in (548mm), Height= 18.00in (458mm) w/ rider, Width= 11.32in (287.5mm) w/ guide wires, Wheelbase= 14.56in (370mm), Motor= 4200Kv 550, Batteries= 2s only, ESC= 80A

WHERE TO BUY: Ebay. (NOTE: VMX450 Resurrected.)

DESCRIPTION:In 2012 the parent company of Venom split off the rc products away from Venom into a new name of Atomik RC. When the rc products moved to Atomik RC, the Venom VMX450 was updated and re-released as the MM450. It was not just a name change.

The MM450 is sold as ARR (almost ready-to-run) with bike, rider, and stand retailing for $350. You need your own 3ch radio system, 2 cell lipo batteries, charger and at this point in time, you need to purchase a small 30A airplane esc (see NOTE at bottom). The size and scale is the same as the VMX450, which seems just a little bit larger than any other manufacturer’s bike released – mostly with regards to the wheels and rider figure being to scale. The lead designer was Chris Nicastro and in terms of features out of the box, he raised the bar (even more than with the VMX450 release) and set a new standard for rc dirt bikes, so a big THANK YOU Chris for your efforts! The MM450 uses traditional pivot shaft direct steering with oil filled damper on the servo, it includes upside down oil filled forks, 550 class motor, foam tire inserts like buggies and cars, beadlock wheels, foam rider, and a unique plastic frame design where the battery sit upright which allowed for a very realistic molded frame.

The major upgrade to the bike was a complete redesign of the rear wheel from a mechanical gyro system to a rear wheel with electric gyro (e-gyro) stability system. Mechanical gyros use gears to spin the flywheel, so you have to get the bike going fast to speed up the gyro. With the e-gyro, a brushless outrunner motor and separate esc control a constant spinning flywheel to give the bike full stability for the entire run. No more long straights to speed up the gyro! The bike can crawl at a slow pace and still balance. The only other retail bikes to include such a system are the AR Racing ARX540 and Skyrc Super Rider SR4. Another change to the bike that helps with stability is the Brian Deegan foam rider figure that uses a stiffer foam material than the old VMX450 “Vinnie” rider. With the stiffer foam, Deegan rider doesn’t flop around and bobble his head as much, which can mess with handling of the bike. Finally, the 550 motor changed from 4800kv to a 4200kv to smooth out the power now that the mechanical gyro was replaced.

Hop-ups made available for the MM450 (and same as for the VMX450) included aluminum triple clamps in red and gun metal, aluminum body posts, and chain adjusters. The bike also has an inexpensive front brake kit that uses the the 3rd channel for brake mixing and really improves performance. Chain adjusters are a must have. The bike is setup for general bashing but the rear shock doesn’t help the bike, so finding a big bore (16mm) 1/8 front buggy shock is really beneficial to the bikes performance. A MM450 community can be found at

NOTE: The ARR version was sold without a e-gyro ESC. To get the e-gyro running a separate ESC will need to be purchased. Most bikes sold on EBAY may already have this installed though. Here is a post I made about the E-gyro ESC: Replacement MM450 E-gyro ESC.

(Except for the gyro of the VMX450, all setups, tips, and how-tos work for both VMX450 and newer Atomik MM450.)
SETUP: MM450 / VMX450 Setups
HOW-TO’S: MM450 / VMX450 How-To’s
TIPS: MM450 / VMX450 Tips