Not approved for use on public roads, reserved solely for competition such as the MHR GP 80 and the super moto trophy, the races for which this top end was created.
Here is the latest top-end kit from METRAKIT. The PRO RACE 4 80cc is a 50mm bore cylinder designed to work with the stock 40mm stroke DERBI crankshaft. This is the most advanced version from the Spanish manufacturer and is the result of all the brand's racing experience with DERBI engines since the 2000s. With 5 intake ports, a booster exhaust, and a cylinder head with a stud, this engine is designed for high performance while remaining robust! Obviously, it should be installed with a large carburetor (24 to 28mm), a suitable racing exhaust, a reinforced crankshaft, and ideally a digital ignition like the MVT DD!
As an option, we offer a Stage 1 preparation. This preparation involves modifying the intake and exhaust ports by increasing the port timing and improving the flow, thus increasing the cylinder's performance. An improved piston and skirt are also included in this modification. Please allow a little extra time for this preparation!
Mounts on:
APRILIA RS 50 2T LC euro 2 2006-> ( DERBI D50B1)
APRILIA RS 50 2T LC euro 4 2018-> (D50B0)
APRILIA RS4 50 2T LC euro 2 ( DERBI )
APRILIA RX 50 2T LC 2007-> ( DERBI D50B0)
APRILIA RX FACTORY 50 2T LC euro 4 2018-> (D50B0)
APRILIA SX 50 2T LC 2007-> ( DERBI D50B0)
APRILIA SX 50 2T LC euro 4 2018-> (D50B0)
APRILIA SX FACTORY 50 2T LC euro 4 2018-> (D50B0)
DERBI Senda DRD PRO R 50 2T LC (D50B0)
DERBI Senda DRD PRO SM 50 2T LC (D50B0)
DERBI Senda DRD RACING R - SM 50 2T LC (D50B0)
DERBI Senda EVO SM 50 2T LC (D50B0)
DERBI GPR NUDE 50 2T LC 2006-> (D50B0)
DERBI GPR RACING 50 2T LC 2006-> (D50B0)
DERBI GPR R 50 2T LC euro 2 2012->
DERBI Senda LIMITED SM 50 2T LC euro 4 2018-> (D50B0)
DERBI Senda X-RACE R - X-RACE SM 50 2T LC (D50B0)
DERBI Senda X-TREME R - X-TREME SM 50 2T LC (D50B0)
DERBI Senda X-TREME SM 50 2T LC euro 4 2018-> (D50B0)
GILERA DRIFTING 50 2T LC euro 4 2018-> (D50B0)
GILERA RCR - SMT 50 2T LC ( DERBI D50B0)
GILERA RCR 50 2T LC euro 4 2018-> (D50B0)
GILERA SMT 50 2T LC euro 4 2018-> (D50B0)
DERBI Senda X-TREME R 50 2T LC euro 4 2018-> (D50B0)
DERBI Senda RACING SM 50 2T LC euro 4 2018-> (D50B0)
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