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The peculiarity of this sports model is given by the swingarm single arm and from the external positioning and not inside of the transmission crown, this allowing the quick replacement, without having to be forced to pull the wheel, while the brake disc remained inside.
The main competitors were the Cagiva , with Cagiva Freccia (C9, C10, C12) before and Mito then, the Gilera first with the SP , then with Cronus then, the Yamaha with the TZR and l ' Honda with' NSR .
Aprilia AF1 50
The Aprilia AF1 50 exits in 1986 and mounted an engine 49.7 cc 2-stroke single cylinder, liquid cooled , with mixer and automatic transmission 4-speed.
The engine was a Minarelli RV 3-4 fed by a carburetor Dell'Orto SHA 14/12, devoid of countershaft balancing and having 4-speed, (hereinafter the fourth was blocked because by law a moped must have a maximum of 3 relationships). At a fairly gritty engine to high, this bike matched a chassis worthy of racing bikes, had 2 disc brakes , a hydraulic fork center pivot, a hydraulic shock absorber and a twin spar frame steel high strength.
They rode this engine l ' Aprilia AF1 50 Project 108 and the' Aprilia AF1 50 Futura first series until in 1992 came the last Aprilia AF1 model, the 50 Futura Pro Sports which mounted an engine with entering the crankcase and a balancer , called Minarelli AM3, always with the limitation of 3 gears, fed by a carburetor Dell'Orto SHA 14/12.
In 1993 the AF1 was replaced by ' Aprilia RS 50 , which was equipped with a 5-speed motor, the Minarelli AM5.
Aprilia AF1 125
This motorcycle is output in various series and countless changes even in the same series
L ' Aprilia AF1 125 or AF1 125 Project 108 was released in 1987 , with an engine Rotax 127 V 2-stroke single cylinder 124.7 cc, liquid-cooled with mixing automatic and 6-speed gearbox, this engine, fed by a carburetor Dell' Orto PHBH 26 ND developed 27 hp at 8,800 rpm and did get the bike to 158 km / h .
This motorcycle was equipped with a central pivot fork 38 mm, a hydraulic shock absorber, with rear wheel drive (with external drive gear swing arm), 2 disc brakes and twin-spar steel frame, the wheels were 16 "three rays each, with tires 100/80 front and 120/80 at the rear, with a front brake 260 mm Brembo , while the latter was 240 mm  .
This first version, was equipped with a very modern and aerodynamic fairing, but with a unique saddle for passenger and pilot, at two different height levels; the windshield was fitted in a rectangular headlight and fairing had doubles extractors of ' air to the radiator.
In 1988 came the ' Aprilia AF1 125 Replica Reggiani , who was equal to the basic version, the only difference being the colors of the racing team, but this version is very different from that of the previous year, with a seat cover for the passenger seat , the air extractor at the side fairing is no longer double and the fairing is slightly different, with two small front sockets under the new round the headlights.
This version of " Replica " celebrates victory Loris Reggiani at the San Marino Grand Prix 250cc class at Misano Adriatico (30 August 1987 ), the first victory for Aprilia in a motorcycle Grand Prix world championship  , was also updated engine, mounting a carburetor Dell'Orto VHSB34LD series allowing to reach an output of 29.24 hp at 10250 rpm
Also in 1988 came the AF1 125 Sintesi which mounted an upside down fork always 38 mm, wheels 17 " with tires 100/80 front and 130/70 at the rear, with new wheels, with 7 spoke to '9 to the front and rear, a new 320 mm front disc and the new Rotax engine 123 instead of the 127 (which increases the 0.5 mm stroke, bringing the measures to 54x54,5) with the adoption of the countershaft and new RAVE valve 2 instead of the previous Rave, so as to have a better linearity of the engine, with a power of 29.06 PS (21,37 kW) at 10,500 rpm and a speed up to 167 km / h.
This motion does not differ from the previous year model only for the mechanical, but also for the cowling, which is reviewed in its entirety, from pigtail thinner and squared, with the air extractors, while the lower part of the hull now still covers most of the engine and chassis block, but has small slits in more in the lower part to extract the air, the mudguard is now decidedly thinner, given the Inverse forks  .
The AF1 Summary '89 Replica presented December 3, 1988 at the Bologna Motor Show and marketed in May 1989, replaces the previous Synthesis just six months after its submission. The '89 version is slightly updated both aesthetically, with a different fairing, which mechanically with the adoption of an exhaust valve with electronic control. The price in 1989 is ITL 5690000 The '89 Synthesis comes in two new colors. After successfully tested on Project 108 and Synthesis '88 colors with color tone on tone combinations, the design department of Noale is delighted with the new Synthesis introducing never before seen graphics. More precisely color triangles. The beloved version Didier De Radigues Replica is a real tribute to the bright colors, and the motion of the Belgian champion for the '89 season replaces Loris Reggiani at the helm of AF1 250. fender and wheels are red. A triangle always turn red part of the tank and hull. The lilac dominates the median part of the fairing, the rear part of the tank and a portion of the codon which integrates the arm supports. The bottom of the hull is white and as the Project 108 Replica adopts a spectacular big "A" symbol of the Aprilia logo and various adhesives of the technical sponsor of the team that runs the world speed. Three quarters of the tail which houses the number 4 (the Belgian rider De Radigues) are colored a vivid aquamarine color also the passenger seat. The second staining designed for people who do not like the replicas of races take less garish tones, but perhaps stands out even more new graphics introduced. Windshield and top of the tank and seat are purple with a lilac wire, while the middle of the bike is white. To liven up the whole, and to reiterate the disposition of grintosissima Synthesis, thinks the broad lower triangle of fiery red fairing.
At the Bologna Motor Show, the replica features the number 6 on the tail, however, won by Loris Reggiani in the 1987 season and not in 1988, where in fact you only thirteenth ranking. Reggiani - and CR1 Racing Team that follows it - so do not renew the agreement with Aprilia for the '89 season and go to the factory Honda RS sponsored by HB bringing with it the No. 6 assigned. Therefore, the Aprilia team will use the number 4 (which at that time was a "free" number) assigned automatically by the FIM to the Belgian Didier De Radigues (who came from the 500 class and therefore did not have a "his" number), new rider factory team. Therefore, it is correct to speak of two Synthesis mod Replica. '89: A version "early-series" Reggiani Replica characterized by the number 6 on the tail and marketed in very few specimens in early '89 and the subsequent and identical De Radigues Replica however characterized by the number 4 on the tail. The Synthesis '89 also demonstrates a very competitive bike and wins with David Bulega the Italian Sport Production Championship in the under 125 21. Summary category is replaced in February '91 by AF1 Futura, although the last Synthesis produced will be the next sport by October '89 Dedicated to those who want to run in the Sport Production Championship. The bike in brief '89 Summary fails to appear too different from the progenitor of 1988, although the few changes made to have donated a more modern and sporty. These changes:> fairing by the new design now more streamlined and always equipped with a headlight, but with a smaller diameter. > New triple clamps with "AF1" logo embossed in the center of the plate and new handlebars lower. > New instrumentation racing style produced by Veglia Borletti, which, however, lose the ever useful fuel level indicator on the instrument cluster of the previous AF1 and perhaps considered too "touristy" by Aprilia. > New tank with cap of aeronautical tank and different tap for the petrol Chassis The chassis is no different than the '88 Synthesis, although the suspension setting is different. The '89 Summary detects a dry weight of 130 kg. (131 kg version 88) Engine The Synthesis of '89 is always the Rotax 123 mounted on the former and maintains the same thermal unit (223362 code shown on the right side of the cylinder). small changes are made, however:> RAVE exhaust valve controlled by electronically controlled electric actuator (pneumatic version 89)> New expansion redesigned and retuned the carburetor Dell'Orto PHBH 28RD> Carter painted motor sand-colored Following the changes made to maximum power to the wheel increases to 29.7 hp at 10500 rpm (instead of 28,66 hp at 10500 rpm / min detected by '88 Summary). Note how the skillful work of aging on the engine has produced not only a more powerful engine, but also more alastico: Synthesis '89 it detects the 400 meters from 50 km / h a time of 18.645 seconds and an output speed of 106.51 km / h (19.352 sec and 96.26 km / h the Sintesi'88). The Synthesis '89 is thus not only more gentle and powerful as the previous version, but also faster, recording a top speed at the top for the category of 166.2 km / h (163.9 km / h version 88). The more speed performance of '89 though Synthesis are not only due to its engine, but also a spoiler specially developed by Aprilia men after months of testing. In fact, the hull of the '89 Summary adopts a new aerodynamic fairing slightly less than the '88 Summary and then in the speed tests lose something than the previous model. So, after several experiments, it was successfully adopted a small spoiler in place under the dome that makes the bike more aerodynamic and therefore faster.
carburetion data Aprilia AF1 Replica '89 (No. 4/6) From the manual Dell'Orto, there are two different types of carburetor adjustment for Aprilia AF1 125 '89, both with carburetor PHBH28RD: - if the aluminum strip fixed to the pan the carburetor is the 4055 code, then, the gas valve 50, jet needle 4x to 3 notch, emulsifier (pulverizer) 266CF, max 120 jet, idle jet 58, starting jet 70, needle valve 250, float 9 , 5 g;
- If the strip is the code 4077, then, the gas valve 55, jet needle 40x to 2 notch, emulsifier 264T, jet max 132, min 52 jet, jet choke 70, the needle valve 250, float 9 , 5 gr.
The latest model in the series Synthesis is presented on October 18th '89 with version SP renamed AF1 125 Sport , which celebrates the victory of David Bulega in Sport Production championship , is recolored and where was equipped with an electronic rave valve, with a carburetor Dell'Orto VHSB LD 34, because this is a bike ready league SP, in fact, until this year was allowed to mount carburetors up to 34 mm, bringing the power to 31.23 hP (22.9 kW) at 10,500 rpm [4 ]  .
Aprilia AF1 125 FUTURA 1990 (color not original)
In 1990 came the AF1 125 Futura , which had the characteristics of the 125 with the difference only Summary cowlings and saddles less curved and thinner, then sharper and the return of a rectangular headlight, making it very similar to the future RS 125, the circles now have less spokes front and rear 5 (this version replaced the synthetic version in the following years) and AF1 125 Sport that thanks to some small changes, such as the carburetor Dell'orto PHBH 28 ND (measure bound by Regulation SP) reached 170 km / h and accelerating the 400 meters in 14 seconds. In the same year it is also presented the derived version Europe without a fairing  .
In 1991 came the AF1 125 Replica , equal to the basic version, but with 40 mm forks with new coverage 110/70 instead of 100/80, a new swing arm to be able to use a tire 140/70 instead of 130 / 70, new 5-spoke wheels, and how the AF1 Replica Reggiani, reported the colors of the racing team  .
In 1992 came out the last of the AF1 series, AF1 Futura Pro Sport 125 , with a slightly different tail, with small vents and slightly up at the terminal and with a new front wing, finally the AF1 was replaced dall ' RS 125 , with the new Rotax 123 V, the most powerful and reliable  .
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