JR Z9100HVS High Voltage Ultra Speed Servo (Metal Gear)

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This item is discontinued and no longer available for purchase. You may want to search our site for a similar item.

This is the JR Z9100HVS High Voltage Ultra Speed Servo. Outrageous speed with the advantage of direct, 2S LiPo operation.


  • Rugged new aluminum case
  • JR® SuperSteel™ gears for high precision, long wear
  • Exclusive motor designd for high voltage applications
  • Outstanding precision combined with outlandish performance


  • Size Category: Standard
  • Type: Digital
  • Application: 1/8, 1/5 on road, off-road surface vehicles
  • Torque: 230 oz/in (2S Li-Po)
  • Speed: .06 sec/60° (2S Li-Po)
  • Dimensions (WxLxH): .82" x 1.58" x 1.57"
  • Weight: 2.6 oz
  • Bushing Or Bearing: Bearing
  • Bearing: Dual
  • Motor Type: Coreless
  • Connector Type: JR
  • Gear Type: Metal
  • Gear Material: SuperSteel™
  • Voltage: 7.4V (2S Li-Po)
  • Deadband: Surface optimized

This product was added to our catalog on March 23, 2009.

Verified Owner
Tuesday, Feb 28 2012 (about 4 years ago)
JR Z9100HVS High Voltage Ultra Speed Servo (Metal Gear)
I took a pair of these when they first first released on Amain and put them in an Xray XT8 '09, and have done in excess of 2500 laps on clay and grass tracks and still going strong today. For me they have been bullet proof. Running on a 2300mHA lipo for 6 x 7min + 2mins practice for each round it takes around 800~988mHA to charge up.
Jeff Allen
Sunday, Mar 17 2013 (about 3 years ago)
JR Z9100HVS High Voltage Ultra Speed Servo (Metal Gear)
I own several sets of both the High Speed and Ultra Torque JR HV servos and they continue to deliver. Yes, they were expensive vs some other servos but I have had zero problems with all 6 ( a set in each of my cars). 1/8th Nitro class will destroy servos quickly if they aren't high quality....and these are. I cannot say anything bad about them.....how could I when they have close to 50 race weekends on them including all the warmups and heats.
Shane Foster
Thursday, Mar 24 2011 (about 5 years ago)
JR Z9100HVS High Voltage Ultra Speed Servo (Metal Gear)
Terrible servos and even worse customer service. I tried running the servo and it just started a bad twitch. Sent for service and came back with screws half tight and didn't even last five minutes before it went bad again. Don't waste your time or money with JR products!
Greg Hopper
Friday, Jan 16 2009 (about 7 years ago)
JR Z9100HVS High Voltage Ultra Speed Servo (Metal Gear)
I e-mailed JR a few weeks ago and asked when they would be coming out with Li-Po voltage-compatible receivers that would support these new servos. They replied, stating that "Most receivers can handle the higher voltage. The Spektrum units can handle up to 9.6 volts. If you have further questions please feel free to give us a call at 1-877-504-0233." This is simply information that I received from JR and I make no representation that what they're saying is true. But why would I question them?
Matt Reinders
Thursday, Oct 21 2010 (about 6 years ago)
JR Z9100HVS High Voltage Ultra Speed Servo (Metal Gear)
These servo's are great as long as you don't really wana run Lipo thru them. I had no problems wile running a NiMh pack for almost 8 months. Finally went to Lipo direct and went thru 4 of them (2 HVS and 2 HVT) in less than 2 months. Plus JR gives you a harder time replacing these $200 servos than they do replacing the $100 9100 series.