Gear Jammer™

  • Locks gears in place for easy installation and removal
  • Allows tightening lock nuts to proper torque setting
  • Works on virtually any motor
  • Powerful magnet holds tool in place during use
  • Billet 6061 T-6 aluminum construction
  • Blue anodized finish with laser engraved Motion Pro logo
  • Originally developed for removing and installing the primary gear on a Honda CRF 450
  • Not for use with impact guns
  • Patented design

Part No. 08-0427


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WARNING: This product can expose you to chemicals including hexavalent chromium (chromium 6), which is known to the State of California to cause cancer and birth defects or other reproductive harm. For further information, go to

Customer Reviews

Gear Jammer
I always used a screw driver in the past and then worried about snapping off the teeth on the gears. This works well. It has more surface area in contact with the gears.
by Gene on October 5, 2008

Great tool
I put this tool between my primary drive gear and clutch outer to torque the flywheel bolt on my RC51. 116 ft/lbs and no scratched paint, mushroomed tips, or most importantly broken gears.
on February 22, 2011

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