ETM RTR Parts & Upgrades

ETM RTR Parts for the RTR Lite, Sport, Alpha, and XL

FactoryZ ETM RTR parts fit all four RTR models: the Lite, Sport, Alpha, and XL. ETM builds the four on one frame at different power levels, so every part on this page fits every RTR. The page is built around one upgrade, the Ultra Bee brake conversion, and everything it takes to install, service, and dress it up.

ETM RTR Ultra Bee brake kit

ETM RTR Ultra Bee Brake Kit, Pre-Bled: swaps the stock rear brake for a Surron Ultra Bee master cylinder and caliper, joined by a steel-braided brake line. It arrives filled with Motul DOT 5.1 and bled, with a single caliper bracket and all mounting hardware, and it keeps your stock 203mm rotor. Pick the FactoryZ Custom caliper or the OEM Surron caliper. Riders also call this a Moto Brake kit.

Building the conversion from parts

ETM RTR Ultra Bee Brake Bracket: the single caliper bracket, sold alone. CNC-machined 6061-T6 aluminum in black or silver, with hardware. This is the part that makes an Ultra Bee caliper mount to the RTR.

Surron Ultra Bee Brake Assembly Rear: the Ultra Bee master cylinder, rear caliper, and rear brake line as one pre-bled unit. Pair it with the RTR bracket above and you have the Ultra Bee conversion in two pieces.

Replacement caliper and master cylinder

Surron Ultra Bee Rear Brake Caliper OEM: a genuine replacement for the caliper on your RTR conversion, with pads and OEM hardware in the box.

Surron Ultra Bee Master Cylinder Rear: the OEM rear master cylinder, M10 banjo, with adjustable lever position.

Pads, service, and bleeding

• Surron Ultra Bee Brake Pads: 100% copper sintered pads for the Ultra Bee caliper, front or rear.
• Surron Ultra Bee Caliper Rebuild Kit: every wear part for one caliper in one order. Works on the FactoryZ Custom and the OEM Surron caliper.
• Ultra Bee Caliper Hardware Kit: OEM replacement slider poles and rubber sliders for the caliper and its bracket.
• Copper Crush Washer Kit M10: four 16mm OD copper washers, enough to reseal two calipers.
• Moto Brake Bleed Kit: hoses, clamps, and a check valve that lets fluid out of the caliper without letting air back in. For when you open the system, shorten a line, or change fluid.

Titanium brake hardware

• M10 x 1.25 Titanium Banjo Bolt: Grade 5 titanium, sold as a 2 pack with copper crush washers, drilled for safety wire.
• Titanium Caliper Bleed Screw: GR5 titanium, M8 x 1.25, a swap for the bleed screw on the Ultra Bee caliper.

Extras

The FactoryZ Water Bottle Holster and the FactoryZ Keychain Jet Tag fit the RTR the same way they fit every e-moto we support.

Other bikes and install help

Every Ultra Bee brake kit FactoryZ builds, for every bike we support, is on Ultra Bee Brake Kits. Bleeding walkthroughs are on the brake bleed guide, and every video is in the install guide library.

ETM RTR Parts FAQ

Do these parts fit every ETM RTR?

Yes. The RTR Lite, Sport, Alpha, and XL share one frame, so each part on this page fits all four.

Do the pads and service parts fit a stock RTR brake?

No. The pads, caliper, master cylinder, and service parts here are Ultra Bee parts. They fit an RTR once it runs the Ultra Bee brake kit or the bracket and assembly combination. Start with the kit.

Is the RTR Ultra Bee brake kit a Moto Brake kit?

Yes. Moto Brake is the older name for the same conversion: the Surron Ultra Bee caliper and master cylinder on a bike that shipped without them. Most riders now say Ultra Bee brake kit.

Do I need a bigger rotor?

No. The kit and the bracket both run the stock 203mm rotor.

Kit, or bracket plus assembly?

Both put the Ultra Bee caliper and master cylinder on your RTR. The kit ships as one pre-bled box with your choice of FactoryZ Custom or OEM Surron caliper. The bracket plus the rear assembly is the two-part route, with the OEM caliper.

Is there a dual caliper or foot brake setup for the RTR?

Not at the moment. RTR parts run a single caliper on the hand lever.

Ships from USA!