Not homologated on open road, only reserved for competition on circuit, closed road.
A novelty from the great Spanish brand ITALKIT and finally available with us, the competition has only to behave. This high 90cc ultra complete engine mounts on mécaboite driving DERBI euro 3 and euro 4, it is the high engine used for the 90cc racing pack. This set will offer you all the power you are looking for to distinguish yourself during competition and win first place. To accompany the ITALKIT crankshaft with celeron bearings in 42.00 stroke and 90mm connecting rod. In combination with the 44.90 stroke, the displacement actual is 90cc.
The cylinder is in aluminum alloy and has a specific heat treatment and an internal coating in niquel / silica and external chrome, giving it all its strength and reliability. 'admission, 2 shaped boosters and finally the impressive exhaust outlet by its shape and size to such an extent that the outlet diameter has been revised upwards.
In addition, the cooling has also been completely revised and corrected in order to offer the best possible heat exchange and at the same time to obtain a significant performance gain, in fact the less an engine runs out of steam and heats up and the more performance. To accompany this cylinder, a cylinder head with a competition stud! Top-of-the-range model, specially designed to offer maximum compression. The cylinder head stud is mounted on an O-ring, the combustion chamber is hemispherical in shape and has a very successful polished finish, smooth and clean as well as an improved chamber volume to 5.50cc.
The Ø50mm piston is not chosen at random, it is a single segment model from ITALKIT with graphite treatment. In other words, very high quality material whose reputation / quality is well established. This piston is therefore equipped with a fine chrome segment 0.80 mm thick, thus promoting revving. Thanks to the graphite treatment, its shapes and its composition, this piston has been very well designed and studied in order to offer better thermal expansion, agreeing at the same time perfectly with this cylinder to withstand straightforward times, sudden changes of speed and prolonged endurance on the circuit.
Clearly, this 90cc Ø50mm racing kit for your DERBI euro 3 and 4 engine will be a major asset to offer you assured victories and guaranteed sensations! Delivered complete as presented, you can trust the photographs, they are contractual as usual.
We recommend that you accompany this pack with at least: a carburation of 24 minimum to 28 for the better, an admission kit in flexible assembly, ultra reinforced crankshaft ITALKIT Competition 42 stroke / 90mm rod, Selettra ignition from ITALKIT with advance variable, cold spark plug NGK B105EGV, compulsory racing engine oil, essential high volume racing expansion exhaust ....
Contains:
-Cylinder Ø47.6mm aluminum 6 transfers with large exhaust booster
-Piston ITALKIT graphite mono segment Ø47,6mm
-Aluminum cylinder head cover
-High compression cylinder head stud, entering type hemispherical shape, polished finish
-Segment Ø47.6 end chrome thickness 0.80mm
-Reinforced piston axis Ø12 X 38mm
-Crab type piston clips
-Pack motor seal
-Installation instructions
-Sticker
As an option we offer a stage 1 preparation, this preparation is a modification of the channels and the exhaust port by increasing the diagrams and improving the duct, it increases the performance of the cylinder. An improvement to the piston and the bottom of the skirt is also included in this modification. Allow a little extra time for this preparation!
