FRP Build Series

Mini Bike Frame Kits & Roller Kits

Two build platforms. Predator 212 ready. Engine not included.

See both kits Which one?

Explore the platforms

Two starting points. Pick the build.

FRP GMB100 mini bike frame kit, Predator 212 compatible steel frame for a custom mini bike build

Best first build

GMB100 Frame Kit

An all-terrain heavy duty mini bike platform.Bolt-on, no welding · 99cc–212cc · 8 colors

All-Terrain Heavy-Duty Steel Frame:Built to Conquer Rugged Trails and Backyards
Fat Tire & Modular Setup:Maximum Traction on Loose Dirt and Pavement
Rear Hydraulic Disc Brake:Premium Linear Stopping Power for Technical Off-Roading
Zero-Modification Engine Bay:Slotted Mount Instantly Fits Small Block Clones

From$299.99

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RMB Rebel stretched mini bike drag frame roller kit, raw steel rolling chassis with narrow front and wide 11 inch semi-slick rear tire

Drag-ready roller

RMB Rebel Roller

A stretched mini bike frame built to drag.90% complete mini bike roller kit · off-road & track only · Predator 212 mini bike frame

Stretched Drag Racing Base:Built to Eradicate High-Speed Wobbles
Track-Ready Tire Combo (11" Semi-Slick Rear):Explosive Launches Without Power Loss
Pre-Installed Hydraulic Steering Stabilizer:True Bolt-On Specs, Zero Welding Required
90% Pre-Assembled Rolling Chassis:Drop In Your Predator 212 & Dominate the Lane

From$579.99

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Neither roller kit is a running mini bike. Both need an engine, a clutch or torque converter and a #420 chain before they ride. I want a complete mini bike instead

Out in the garage

See the platform get built

FRPStep one of a GMB100 mini bike build

FRPA dialed-in GMB100 build by @dr.raneiro

LittleBoggerFRP mini bike running a Predator 212

Simple ServicesPredator 212 FRP mini bike build

Mini_gangfrpFirst start on the GMB100

mycustomgokartBrand new FRP Rebel mini bike, out of the box

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Ships From US WarehousesNo overseas wait US-Based SupportReal people, real builds Predator 212 FitmentHonda GX-clone bolt pattern Parts & Build GuidanceSpare parts kept in stock

2-second choice

RMB Rebel Drag Frame vs. GMB100 Standard Frame

Specs & Features	RMB Rebel Drag FrameTrack ready · $579.99	GMB100 Standard FrameAll-terrain · $299.99
Primary Riding Terrain	Track & Off-RoadClosed tracks and straight-line drag racing	Backyard & TrailBackyards, campsites, muddy trails and off-road cruising
Chassis Geometry	Stretched & Low-ProfileSlammed, aerodynamic racing stance	Compact & RuggedTraditional upright mini bike architecture
Wheel & Tire Setup	Aggressive Drag ComboFront: 3.00-8 Rear: 11x7.10-5 semi-slick on an aluminum hub	All-Terrain Uniform ComboFront & rear: 13x5.5-6 chunky fat tires for loose dirt and grass
High-Speed Feel	Runs Dead StraightStretched 43.4 in wheelbase eradicates death wobbles	Exceptionally AgileShort, nimble wheelbase for quick moves through trail obstacles
Control & Brakes	Dual-Piston Rear Hydraulic180 mm stainless rotor, no front brake Steering stabilizer pre-fitted	Single-Piston Rear HydraulicStandard quick-turning fork neck
Chassis Expandability	Wheelie Bar & Fuel Cell ReadyReinforced mounting points and dedicated fuel-tank holes (wheelie bar not included)	Suspension, Fenders, RacksHouses aftermarket front forks and rear cargo racks
Engine Compatibility	Predator 212 & GX ClonesGX160/GX200, Titan TX200, Tillotson 212 and 196–224cc clones with a 3/4 in shaft; Briggs Animal needs an adapter plate	Predator 212 Direct Fit99cc–212cc, compatible with most GTC and clone engine kits
Use & Limits	Off-Road & Track Only220 lb max load · 57 lb chassis · not street legal	Private Property Use OnlyNot available in California
Assembly Status	90% Complete Rolling ChassisFork, wheels, tires, rear brake, rotor, 41T sprocket, seat, bars, grips and kill switch fitted	Pre-Assembled RollerBolt-on setup, no welding required; rollers, axles and brakes pre-aligned

Why builders start here

Spend less time matching parts

Fewer parts to match

Key chassis and brake hardware is already fitted, so the build starts at assembly instead of at sourcing. Check each kit for its exact contents.

Predator 212 ready

Both platforms take the Honda GX-clone mounting pattern used by the Predator 212 — the engine most mini bike builds are planned around.

Hydraulic braking included

The GMB100 ships with a hydraulic disc brake fitted. The RMB Rebel runs a dual-piston rear caliper on a 180 mm stainless rotor.

Owner feedback

What frame buyers say

4.6 out of 5 from 33 GMB100 frame reviews

Customer photo review of FRP Moto GMB100 Mini Bike Frame | Predator 212 Compatible | 99cc–212cc Custom Build — ★★★★★ Lonzo_559 V.

Customer photo review of FRP GMB100 Gas Mini Bike Frame — ★★★★★ Troy S.

Roller kit basics

What exactly comes in the box with a "90% pre-assembled roller kit"?

You receive a rolling chassis. On the RMB Rebel that is the welded steel frame, 1-inch carbon steel fork, front 3.00-8 and rear 11x7.10-5 semi-slick wheels with tires fitted, a dual-piston rear hydraulic brake with a 180 mm stainless rotor, a 420-pitch 41T rear sprocket, seat, bars, grips, kill switch and the pre-fitted steering stabilizer. Axles and chain tensioners are pre-aligned. The engine, clutch or torque converter and chain are not included.

What extra parts do I need to buy to make this a fully running bike?

To get on the track or trail you only need to supply: 1) a compatible engine, for example a Predator 212cc; 2) a drive system — a 3/4" centrifugal clutch or a torque converter, depending on your build; 3) a #420 drive chain; 4) a throttle assembly and cable to match that engine. Seat, bars, grips and the kill switch are already fitted on the roller.

Are these complete, ready-to-ride mini bikes?

No. Both are rolling chassis built for a project. If you want a running bike out of the crate instead, shop the complete mini bike collection.

Engine & drivetrain

Do I need to weld or drill holes to fit a Predator 212 engine?

No welding or drilling is required. Both frames use a slotted engine mount base plate, so any standard small block clone — Predator 212, Tillotson 212, Honda GX160/GX200, Titan TX200 and 196–224cc clones with a 3/4 inch shaft — bolts straight down with no frame modifications. Briggs Animal engines use a different pattern and need an adapter plate. The GMB100 frame is rated for 99cc to 212cc engines.

Does the RMB Rebel drag frame fit a torque converter (TAV)?

The RMB Rebel is optimized for lightweight track setups running a racing clutch and chain. To run an asymmetrical torque converter such as a 30 Series TAV you may need a small engine riser plate, or minor backing plate trimming, to clear the ultra-low-profile rear cross tubes. For trail riding with a torque converter, the GMB100 gives you the most out-of-the-box clearance.

Can these frames be converted into high-power electric mini bikes?

Yes. The open, flat-bottom engine bay on both the RMB Rebel and the GMB100 makes them popular platforms for custom electric conversions. They accommodate mid-drive motors such as QS138 or CYC setups, alongside custom-fabricated 72V lithium battery boxes.

Start the build

Build it your way

Pick the platform that matches the plan. The engine, the gearing and the paint are yours to choose.

Shop RMB Rebel Roller Shop GMB100 Frame