RG BK-4R

RG BK-4R 1:5 Scale GP Racing Motorcycle Kit
 
The future of large-scale RC racing is here. Meet the BK4R — smarter, tighter, and faster than ever.
 
The RG BK4R is the latest evolution in the iconic BK series, built for racers who demand precision, performance and customisability straight out of the box. Whether you're pushing for podiums or carving corners for fun, this bike delivers next-level feel, flexibility and control.

Key Features:
 
Refined Chassis Layout
More space, cleaner layout — easier ESC installs and optional cross bracing so you can dial in your flex the way you like it. Additional body post added to keep the lower fairing more secure at high speeds and in cross wind conditions. 
 
New 3-Piece Receiver Box & Cooling Ducts (Now Standard)
Keeps things cool and secure. Easy swaps if things go sideways mid-race.
 
Floating Front Axle & Updated Hub System
Less play. More control. Say goodbye to any risk of fork bind and vague steering.
 
Optional Double Rear Swingarm Kit
Flip the driveline based on track direction. More lean angle. Better balance. Retrofits to previous models too.
 
Fixed Front Brake Rotor
No more drag. Just smoother wheel spin and sharper handling where it counts.
 
NAI Fork System – Now Included
Proven, race-ready suspension right out of the box. 
 
Choose Your Spec:
 
Superbike or Stock Bike Kit
(Stock Bike version comes without front brake components)
 
Single-Sided Swingarm: Sexy...what more can you say... oh and quick tyre swaps
 
All kits include a set of GRP tyres and a complete fairing and rider upainted in clear lexan. 
 
Required to complete:
 
Steering servo 
Lipo battery
brushless ESC and motor combo of choice.