7
USAGE
REPAIR AND MAINTENANCE
Need Help? Visit our website for replacement parts, product support, a list of authorized service centers in the US and customer service contact information 
at www.razor.com. Please have the product I.D. code (located on the white label of your product) available for better assistance. Additional Customer 
Service contact information is listed at the back of this manual.
WARNING: The brake 
is capable of causing the electric 
motorbike to skid the tire, throwing 
an unsuspecting rider. Practice in 
an open area free from obstacles 
until you are familiar with the brake 
function. Avoid skidding to a stop as 
this can cause you to lose control or 
damage the rear tire.
Note: The brake lever contains a 
safety switch to cut power to the 
motor when the brake is applied. In 
an emergency, applying the brake 
will always stop the product from 
moving. Do not disable or replace 
this lever with anything other than a 
genuine Razor replacement part.
 Starting the RSF350
Place both hands on the handlebars. Slowly push forward with one foot and 
apply the throttle (A).
Note: Keep both feet on the foot pegs when unit is in motion.
 Testing the Brake
To use the brake, squeeze the brake lever to increase the pressure on the brake. The brake lever is fitted with a cable 
adjuster to compensate for cable stretch and/or to fine-tune the lever movement to engage the brake. If brake is not 
engaging properly, follow instructions for adjusting the brake outlined below.
 Stopping the RSF350
Release the throttle (A) and apply the brake (B).
Note: When coming to a complete stop, place both feet on the ground to 
balance the unit.
1 To adjust brake cable play, thread 
the brake lever adjuster in or out 
1/4 to 1/2 turn until the desired 
brake adjustment is attained. Most 
adjustments are complete at this 
step. If brake still needs further 
adjustment, proceed to step 2.
2 If the brake has too much slack, 
loosen the rear anchor bolt with a 5 
mm Allen wrench and pull the brake 
wire tighter. The distance of the 
brake wire between the end of the 
cable and the anchor bolt should be 
between 37 mm and 44 mm. 
3 If the disc brake is dragging on 
the brake pads, use your fingers to 
twist the caliper adjuster in either 
direction until disc is centered 
between the brake pads. 
Turn power switch “OFF” before beginning repair or maintenance:
• Read the instructions
• Remove charger plug
• Turn the power switch off
• Secure the product under repair
• Exercise caution around  
exposed parts
• Contact Razor customer service 
if unsure about any repair or 
maintenance
A A
B
 Adjusting the Brake
Required Tool: 5 mm Allen Wrench (not included)