Losi LOSB9423 User Manual

Xcelorin 8th Sensorless Brushless Motor Instructions

◊ LOSB9420 1300Kv ◊ LOSB9421 1700Kv ◊ LOSB9422 2100Kv ◊ LOSB9423 2400Kv

Thank you for purchasing the Losi™ Xcelorin™ sensorless motor. This motor will provide you the benefit of
the latest in brushless technology.

We believe it will be to your benefit to take the time and effort to read these instructions.
We are confident you will be satisfied with the performance of the Xcelorin Sensorless Motor.

Losi/Horizon Support

If you have any questions concerning operation of your Xcelorin Motor, please call Horizon customer support
at 1 877 504 0233.

You are welcome to call us with any support issue or question you may have.

Safety Precautions and Warnings:

 Please read instructions before operating.
 Do Not use a Schottky Diode with this motor.
 Avoid over-gearing by monitoring temperature.
 Operating temperature should not exceed 190F – 205F (87C – 96C) degrees.
 Do Not over tighten the motor mounting screws. Damaged threads are not covered under warranty.
 Ensure the motor screws do not go into the motor more than 0.180 in (4.5mm).

Specifications:

LOSB9420 LOSB9421 LOSB9422 LOSB9423
Sensorless Construction Yes Yes Yes Yes
Number of Poles 4 4 4 4
Rotor Magnet Sintered Sintered Sintered Sintered
RPM @ 11.1V 14,430 18,870 23,310 26,640
RPM per Volt 1300 1700 2100 2400
Power (W) 1200 1500 1900 2200
Efficiency 90% 90% 86% 85%

Common Specifications:

Precision Ball Bearings
Compatible with 2S thru 5S LiPo batteries, and from 6 to 12 cells
Weight: 10.8 oz (306 g)
Length: 2.64” (67mm) *less shaft length
Diameter: 1.54” (39mm)
Shaft: 0.197” (5mm)
Shaft length: 0.92” (23.4mm)

Xcelorin 8thSensorless Motors v1.1

Xcelorin 8th Sensorless Brushless Motor Instructions

Installation and Maintenance:

 Make certain the 4mm motor screws being used do not extend into the motor more than 0.18 in

(4.5mm). Otherwise, you can internally damage the stator windings.

 With a Sensorless motor you will need to connect the 3 ESC motor leads from the Electronic Speed

Control (ESC), one to each tab.

 If the motor runs in the opposite direction desired, unplug any two motor wires, reverse the location

and plug back together.

 Do not over-tighten the motor screws.
 Brush off dirt and dust frequently from the bearings. Place a drop of oil on each bearing at the same

time.

Gearing Suggestions:

* Pinion recommendations with 45T Spur Gear

Losi Vehicles

Xcelorin 4S 4S 5S 5S

Motor

Kv Buggy Truggy Buggy Truggy

1300 18 18 15 16

1700 16 17 14 15

2100 15 16 13 14

2400 14 15 12 13

* Pinion recommendations for other Vehicles

Xcelorin 4S 4S 5S 5S

Motor Kv Buggy Truggy Buggy Truggy

1300 17 18 16 17

1700 16 17 15 16

2100 14 15 13 14

2400 13 14 12 13

* These recommendations are developed as a starting point for large 8

Xcelorin 8thSensorless Motors v1.1

th

scale dirt track racing.

Xcelorin 8th Sensorless Brushless Motor Instructions

Warranty Period:

Exclusive Warranty- Horizon Hobby, Inc., (Horizon) warranties that the Products purchased (the "Product") will be free
from defects in materials and workmanship at the date of purchase by the Purchaser.

Limited Warranty

(a) This warranty is limited to the original Purchaser ("Purchaser") and is not transferable. REPAIR OR REPLACEMENT AS
PROVIDED UNDER THIS WARRANTY IS THE EXCLUSIVE REMEDY OF THE PURCHASER. This warranty covers only those
Products purchased from an authorized Horizon dealer. Third party transactions are not covered by this warranty. Proof of purchase is
required for warranty claims. Further, Horizon reserves the right to change or modify this warranty without notice and disclaims all other
warranties, express or implied.

(b) Limitations- HORIZON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, ABOUT NON­INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OF THE PRODUCT. THE PURCHASER
ACKNOWLEDGES THAT THEY ALONE HAVE DETERMINED THAT THE PRODUCT WILL SUITABLY MEET THE
REQUIREMENTS OF THE PURCHASER’S INTENDED USE.

(c) Purchaser Remedy- Horizon's sole obligation hereunder shall be that Horizon will, at its option, (i) repair or (ii) replace, any Product
determined by Horizon to be defective. In the event of a defect, these are the Purchaser's exclusive remedies. Horizon reserves the right to
inspect any and all equipment involved in a warranty claim. Repair or replacement decisions are at the sole discretion of Horizon. This
warranty does not cover cosmetic damage or damage due to acts of God, accident, misuse, abuse, negligence, commercial use, or
modification of or to any part of the Product. This warranty does not cover damage due to improper installation, operation, maintenance,
or attempted repair by anyone other than Horizon. Return of any goods by Purchaser must be approved in writing by Horizon before
shipment.

Damage Limits:

HORIZON SHALL NOT BE LIABLE FOR SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOSS OF PROFITS OR
PRODUCTION OR COMMERCIAL LOSS IN ANY WAY CONNECTED WITH THE PRODUCT, WHETHER SUCH CLAIM IS
BASED IN CONTRACT, WARRANTY, NEGLIGENCE, OR STRICT LIABILITY. Further, in no event shall the liability of Horizon
exceed the individual price of the Product on which liability is asserted. As Horizon has no control over use, setup, final assembly,
modification or misuse, no liability shall be assumed nor accepted for any resulting damage or injury. By the act of use, setup or
assembly, the user accepts all resulting liability.

If you as the Purchaser or user are not prepared to accept the liability associated with the use of this Product, you are advised to return
this Product immediately in new and unused condition to the place of purchase.

Law: These Terms are governed by Illinois law (without regard to conflict of law principals).

Safety Precautions:

This is a sophisticated hobby Product and not a toy. It must be operated with caution and common sense and requires some basic
mechanical ability. Failure to operate this Product in a safe and responsible manner could result in injury or damage to the Product or
other property. This Product is not intended for use by children without direct adult supervision. The Product manual contains
instructions for safety, operation and maintenance. It is essential to read and follow all the instructions and warnings in the manual, prior
to assembly, setup or use, in order to operate correctly and avoid damage or injury.

Questions, Assistance, and Repairs:

Your local hobby store and/or place of purchase cannot provide warranty support or repair. Once assembly, setup or use of the Product
has been started, you must contact Horizon directly. This will enable Horizon to better answer your questions and service you in the
event that you may need any assistance. For questions or assistance, please direct your email to [e-mail]
call 877.504.0233 toll free to speak to a service technician.

Inspection or Repairs

If this Product needs to be inspected or repaired, please call for a Return Merchandise Authorization (RMA). Pack the Product securely
using a shipping carton. Please note that original boxes may be included, but are not designed to withstand the rigors of shipping without
additional protection. Ship via a carrier that provides tracking and insurance for lost or damaged parcels, as
for merchandise until it arrives and is accepted at our facility. A Service Repair Request is available at www.horizonhobby.com on
the “Support” tab. If you do not have internet access, please include a letter with your complete name, street address, email address and
phone number where you can be reached during business days, your RMA number, a list of the included items, method of payment for
any non-warranty expenses and a brief summary of the problem. Your original sales receipt must also be included for warranty
consideration. Be sure your name, address, and RMA number are clearly written on the outside of the shipping carton.

Horizon is not responsible

, or

Warranty Inspection and Repairs
To receive warranty service, you must include your original sales receipt verifying the proof-of-purchase date. Provided warranty

conditions have been met, your Product will be repaired or replaced free of charge. Repair or replacement decisions are at the sole
discretion of Horizon Hobby.

Xcelorin 8thSensorless Motors v1.1

Xcelorin 8th Sensorless Brushless Motor Instructions

Non-Warranty Repairs
Should your repair not be covered by warranty the repair will be completed and payment will be required without notification or
estimate of the expense unless the expense exceeds 50% of the retail purchase cost.

agreeing to payment of the repair without notification. Repair estimates are available upon request. You must include this request with
your repair. Non-warranty repair estimates will be billed a minimum of ½ hour of labor. In addition you will be billed for return freight.
Please advise us of your preferred method of payment. Horizon accepts money orders and cashiers checks, as well as Visa, MasterCard,
American Express, and Discover cards. If you choose to pay by credit card, please include your credit card number and expiration date.
Any repair left unpaid or unclaimed after 90 days will be considered abandoned and will be disposed of accordingly.

warranty repair is only available on electronics and model engines.

Electronics and engines requiring inspection or repair should be shipped to the following address:

Horizon Service Center

4105 Fieldstone Road

Champaign, Illinois 61822

All other Products requiring warranty inspection or repair should be shipped to the following address:

Horizon Product Support

4105 Fieldstone Road

Champaign, Illinois 61822

Please call 877-504-0233 with any questions or concerns regarding this product or warranty.

By submitting the item for repair you are

Please note: non-

Xcelorin 8thSensorless Motors v1.1