LRP - Nitro Motor ZR.21 Spec.4 Pullstart
The LRP ZR.21 Spec.4 pullstart engine is a performance-optimized .21 nitro engine and is ideally suited as a replacement or upgrade engine for RTR stock engines. Optimized port timing ensures strong power delivery and very responsive throttle behavior.
The engine setup is intentionally kept simple. The ZR.21 Spec.4 can be tuned quickly and easily and impresses with clean and reliable running characteristics.
With its well-balanced combination of performance, ease of use and proven LRP nitro technology, the ZR.21 Spec.4 pullstart is the perfect entry into the world of LRP nitro engines.
Soon available again.
14.04.2026
RRP:
119,90 EUR
(Recommended retail price)
Shop-price:
119,90 EUR
(Price incl. VAT, excl. shipping costs)
Features
- Replacement tuning engine for existing .21 RTR type engines
- Best value for money
- XTEC PowerCarb3 15S-2 carburettor - Flow optimised carburettor with 9.0mm inlet for maximum power and easy adjustability at the same time
- Universal fit - Fits all major .21 engine mounts
- 3 + 1 Ports
- Standard burn room - Guarantees easy adjustment of the engine in all conditions
- XTEC T6 engine housing - Especially reinforced heavy duty engine housing for toughest offroad action
- Power Start capable - Prepared for the use of the LRP Power Start for starting the engine at the push of one button