Warning, prohibited on public roads! This cylinder exceeding the engine displacement of 50cc is reserved solely for competition on circuits, drag racing... .
Here is the 80cc top end from the Spanish brand BARIKIT for DERBI Euro 1 and 2 mopeds. This model offers good power and a significant increase in torque. The cylinder is a cast iron model, therefore offering very high reliability, ideal for endurance riding, stunt riding, etc.
The port timings offer an excellent torque-to-power ratio. The cylinder features a very large exhaust port with a booster and five enlarged intake ports. The base retains its original shape. With its 50mm bore, it delivers a true displacement of 78.53cc when used with the original 40mm stroke crankshaft from the DERBI engine.
The piston is a two-ring design to further preserve torque and durability. The rings supplied with the kit are made of very thin, special steels to allow for high RPMs while maintaining torque.
In short, it's very similar to the FURYTECH but is nevertheless better made with higher-end materials. This cylinder will therefore offer you reliability, power (especially with good port timings, thin piston rings, and a booster exhaust port), and plenty of torque!
To top it all off, BARIKIT has opted for a reinforced aluminum gasket for the cylinder head, and the thermal assembly features two screw holes on each side for added strength. Our only regrets are that the channels aren't more refined and that the side cylinder head screws, or any other cylinder head hardware, aren't included. This is a minor detail, however, considering the unbeatable price. Please note that depending on availability, we may receive the kit in black.
We recommend that you accompany this top end with at least : a Ø21mm carburetor (24 / 25mm to get the most out of it), racing exhaust, cold spark plug (B9 / B10 depending on temperature), reinforced crankshaft and bearings.
The pack contains:
-Cast iron cylinder Ø50mm with 5 transfer ports and large exhaust with boosters
-High-compression aluminum cylinder head with polished finish
-Two-segment piston Ø50mm
-X2 thin chrome-plated steel segments
-Piston pin Ø12mm X 40mm length
-X2 G-type piston clips
-Exhaust, cylinder head and base gaskets
As an option, we offer a Stage 1 preparation. This preparation involves modifying the exhaust port by increasing the port timing and improving the flow, thus increasing cylinder performance. Skirt modifications are also included in this service. Please allow a little extra time for this preparation.
This top end is compatible with 50cc motorcycles with gearboxes equipped with the DERBI Euro1 and Euro2 engine:
BULTACO Astro enduro 50cc
BULTACO Lobito supermoto 50cc
DERBI GPR 50 Nude before 2004 (EBS050)
DERBI GPR 50 Racing before 2004 (EBS050)
DERBI GPR 50R Replica, model years 2001 to 2004
DERBI GPR 50cc, model years 1998 to 2001
DERBI Senda 50cc pre-2000 (tubular frame)
DERBI Senda 2000 50cc pre-2004 (perimeter frame) Euro2
DERBI Senda DRD supermotard pre-2000 (tubular frame)
DERBI Senda DRD supermoto pre-2004 (perimeter frame) Euro 2
DERBI Senda Enduro pre-2000 (tubular frame)
DERBI Senda R DRD Enduro pre-2000 (tubular frame)
DERBI Senda R DRD Enduro pre-2004 (perimeter frame) Euro2
DERBI Senda SM pre-2000 (tubular frame)
DERBI Senda SM pre-2004 (perimeter frame) Euro 2
DERBI Senda X-Race 2000 pre-2004 (perimeter frame) Euro 2
DERBI Senda X-Race Trail pre-2000 (tubular frame)
DERBI Senda X-Trem Enduro pre-2000 (tubular frame)
DERBI Senda X-Trem Enduro pre-2004 (perimeter frame) Euro 2
DERBI Senda X-Trem SM pre-2000 (tubular frame)
DERBI Senda X-Trem SM pre-2004 (perimeter frame) Euro 2
GILERA GP Replica 50cc
GILERA GSM 50cc
GILERA HAK Euduro 50cc
GILERA RCR Euduro 50cc (tubular frame)
GILERA SMT SM 50cc (tubular frame)
GILERA Sioux Enduro 50cc
GILERA Zulu Enduro 50cc
And many other models...
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