Not approved on open road, only reserved for competition on circuit, runs, closed road.
New for 2016, the color is announced: high-end crankshaft with 90mm forged connecting rod and Ø20mm bearings, without balancer, 12x17x15 cage, very high quality steels, dynamic top balancing, excellent diagrams, high compression cylinder head with stud, excellent ratio of compression, cooling studied with a semi-closed type cylinder, large diameter exhaust with boosters passing on the side transfers, 6 large intake transfers with studied shapes and specific architecture, stroke 44.90 with piston diameter Ø50mm, graphite piston , ....
As usual, the ITALKIT brand is no exception to the rule by composing this pack of the best current parts on the market. The aluminum alloy cylinder has a specific heat treatment and an internal coating in niquel / silica and external in chrome, giving it all its solidity and reliability, foolproof! Equipped with no less than 9 lights including 6 intake transfers including 3 lateral and 2 at the rear, 2 shaped boosters passing on the sides and finally the impressive exhaust outlet by its shape and size to such an extent that the outlet diameter has been revised upwards and measures no less than Ø30mm, between the fixing axis for the exhaust 46 mm.
The competition has better behave and is far behind on most of the maxi-kits. Only negative point of this pack, the absence of a set of clutch springs, celeron bearings and several base seals like the pack for AM6! A novelty from the great Spanish brand ITALKIT and finally available from us, this ultra complete 90cc engine pack is mounted on mécaboite driving DERBI Euro 1 & 2. This set will offer you all the power you are looking for to distinguish yourself during competition and win first place .
That's not all, 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, indeed less an engine runs out of steam and overheats. and more performances remain present.To accompany this cylinder, a cylinder head with competition stud! Top-of-the-range model, specially designed to offer maximum compression. The cylinder head stud has a hemispherical combustion chamber and has a very successful polished finish, smooth and clean. Chamber volume increased at the same time.
The 50mm piston is not chosen at random, it is a single segment model with graphite treatment. In other words, very high quality material whose reputation / quality is well established. This piston is therefore equipped with a thin chrome segment 1 mm thick thus promoting the increase in speed. 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, at the same time agreeing perfectly with this cylinder to withstand frank recoveries, sudden changes of regimes and prolonged endurance on the track.
Finally, the special 44.90mm stroke crankshaft and 90mm connecting rod without balancer. This model is unique and once again, really successful. It is perfectly balanced and cut from the best steels on the market. Its dynamic balancing results from the inorganic tungsten carbide compound. This material in summary is a combination of carbon and tungsten. It is a material known to be very dense, very resistant and very hard.A new connecting rod is also installed on this linkage, an ultra-reinforced model machined in the mass. Ultra light, it is really reserved for competition!
It is this type of connecting rod that equips real competition crankshafts BIDALOT or even MALOSSI MHR BIG BORE and other extremely rare vilo! Featherweight and maximum rigidity are there. Its lubrication is improved, the small end cage is increased for better holding, treated with silver and mounted on anti-friction wedges. A crankshaft as you will have understood, perfectly designed and adapted to accompany this high engine, which can support without no problem with the wildest engine speeds of up to 16,000 rpm and in combination with this cylinder and the 44.90mm stroke the actual displacement is 88cc.
Clearly, this 90cc Ø50mm racing pack / kit for your DERBI euro 1 & 2 engine will be an essential 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 26 to 28 for the better, an admission kit in flexible assembly, Selettra ignition from ITALKIT with variable advance, cold spark plug NGK B105EGV, racing engine oil compulsory, large volume racing relaxation exhaust essential ....
This pack contains:
-Cylinder Ø50mm aluminum 6 transfers with large exhaust booster
-Piston graphite mono segment Ø50mm
-Aluminum cylinder head cover
-High compression hemispherical cylinder head stud, polished finish
-Segment Ø50 end chrome thickness 1 mm
-Reinforced piston axis Ø12 X 37mm
-Crab type piston clips
-Ultra reinforced crankshaft long stroke 44.90mm ultra reinforced 90mm rod
-Silver needle cage Ø12X17X15mm
-Pack of engine seal
-X4 Reinforced studs M7X120mm
-Installation instructions
-Sticker
Technical recaps:
- Work of the original housings necessary for transfers revised upwards
- Cooling: semi-closed liquid
- Compression ratio: not communicated
- Announced displacement: 90cc
- Actual displacement: 88cc
- Power declared: not communicated
- Base gasket provides thickness 0.30 mm
- Recommended squish value not communicated
- Volume of the chamber (cylinder head) 6.20cc
As an option we offer you a stage 1 preparation, this preparation is a modification of the exhaust port by increasing the diagrams and improving the duct, it increases the performance of the cylinder. An improvement to the bottom of the skirt is also included in this modification. Allow a little extra time for this preparation!
This high engine is mounted on 50cc motorcycles with gearboxes equipped with the DERBI Euro1 and Euro2 engine:
BULTACO Astro enduro 50cc
BULTACO Lobito supermotard 50cc
DERBI GPR 50 Nude before 2004 (EBS050)
DERBI GPR 50 Racing before 2004 (EBS050)
DERBI GPR 50R Replica year 2001 to 2004
DERBI GPR 50cc year 1998 to 2001
DERBI Senda 50cc before 2000 (tubular frame)
DERBI Senda 2000 50cc before 2004 (perimeter frame) Euro2
DERBI Senda DRD supermotard before 2000 (tubular frame)
DERBI Senda DRD supermotard before 2004 (perimeter frame) Euro 2
DERBI Senda Enduro before 2000 (tubular frame)
DERBI Senda R DRD Enduro before 2000 (tubular frame)
DERBI Senda R DRD Enduro before 2004 (perimeter frame) Euro2
DERBI Senda SM before 2000 (tubular frame)
DERBI Senda SM before 2004 (perimeter frame) Euro 2
DERBI Senda X-Race 2000 before 2004 (perimeter frame) Euro 2
DERBI Senda X-Race Trail before 2000 (tubular frame)
DERBI Senda X-Trem Enduro before 2000 (tubular frame)
DERBI Senda X-Trem Enduro before 2004 (perimeter frame) Euro 2
DERBI Senda X-Trem SM before 2000 (tubular frame)
DERBI Senda X-Trem SM before 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 ...
