"MP": 1995

This section shows the features and the differences between the different model-year: in the other area of the site technical matters and further investigated, including any SP version. The pictures serve as proof of the information provided and as integration of the text. Please note that outside Italy some bike was sold up to 1998 with the new body shape, but the "old" frame and the Rotax 123 engine. These bikes are GS type, so please check the dedicated areas of the site.

 First off all a note regarding the differences between the first extrema equipped with Rotax 123 and the next with the Rotax 122:

  1. the pivot in the first series is positioned differently and the different feeling  of riding is appreciable only by few experienced riders; however, it would be interesting to measure if the displacement of the RS rotax-122-powered is due to the different shape and positioning of the engine (actually I have no proof of a different effect of the chain force)
  2. in practice on the road you notice a different behavior of the engine, which has more torque at middle rpm and appears to be slightly more powerful of the Rotax 122 that, on other side, has a bahaviour more "flat".

The extrema 1995 type "MP"

In 1995 aprilia starts to sell a new motorcycle, which keeps only some detail fof previous "GS" series. Here below a summarization of the new features compared to the previous extrema:
  1. Rotax 122 instead of 123 (except that of many bikes "export")
  2. ignition with variable timing instead the simple "two-step", but that can not do without the battery as in the Rotax 123
  3. new aluminium frame, polished as the 1994 one
  4. pivot lowered by 3 mm
  5. no shape for the crankcase oil refill because in Rotax 122 it change position
  6. no protuberances near the steering column
  7. different front support of the engine
  8. new body (excepted the rider seat and the black matt side panels)
  9. new headlight and tail light
  10. new front disc flange
  11. the silencer has the same shape and structure of the 1994 one (aluminium and carbon fiber cover), but instead of a plate it has an embossed approval number
  12.  electronic instrumentation with tachometer and multi-function display control (clock, water temperature, battery voltage, and chronometer)
The hydraulic brake system, rear disc, rear frame, the carburetor, the fork, the swingarm, the driver and passenger pegs are identical to the previoul model. The tank cover is interchangeable with the previous series.
The colors are two, both Replica:
  1. black with Chesterfield sponsorship, "Max Biaggi" decals on the windshield and a specific stiker commemorating the World Championship 250 and 125 win on 1994 (Max Biaggi and Kazuto Sakata)
  2.  gray/red/metallic blue "Reggiani Replica", which no longer refers to a racing model of GP 250, but to the RSW-2 500 rode by Loris Reggiani and who curiously had in some cases, the front disc of the previous version also for rotax 122 powered versions
On the road when you will note a different behavior of the engine, slightly less powerful than the Rotax 123 in all the power band, but more "frindly". Despite the pivot repositioned the behaviour is not so different: probably on the track only some rider can appreciate it. However, it would be interesting to measure whether the displacement of the RS 122 is due to the different shape and positioning of the engine in the frame and if it have effect on the chain-pulley-effect or not.
  • Biaggi replica
  • Reggiani replica
  • Biaggi replica
  • Biaggi replica
  • Biaggi replica
  • LIvrea Reggiani replica with "export" passenger seat
  • Dashboard with electronic rev counter and multifunction LCD
  • The silencer with the approval ebossed on the end

The extrema Sport production 1995 type "MP"

 

 

The bike was originally sold with:

  1.     cylinder 220L (code AP022361, available in racing version code AP8106365) with a special head (larger volume and wider band of squish)
  2.     kick-starter lever
  3.     left side fairing with a special shape for the kick-starter
  4.     specific oil tank
  5.     CDI unit (available an optional racing veriosion that allowed aprilia to repromming it on the tracks)
  6.     coil
  7.     primary transmission
  8.     head studs (unlike the 122 standard screws)
  9.     specific single ring piston with special pin (also available in a racing version)
  10.     carbon-fiber reeds
  11.     specific electrical system
  12.     specific RAVE unit
  13.     carburetor Dell'Orto VHSB 34 LD (PHBH 28 BD supplied with the bike with its manifold and carburetor adapter)
  14.     expansion mivv SP and its collector (in some cases was even provided with a black MIVV homologation codes stamped)
  15.     bulkhead of the carburetor
  16.     bigger radiator
  17.     Marchesini wheels identical to those of the SP 1994
  18.     counterweights handlebar (smaller than those of the "road")
  19.     clutch cover with oil seal and hole for the kick starter shaft, no longer coaxial with the gear shaft as in the Rotax 123 engine)
  20.     fully-adjustable shock absorber (black)


For racing purpose it was available optional DLR silencer, a racing CDI double-plug programmable by aprilia on tracks, special cylinder head and 220L not fully reworked from aprilia racing department.

Do not fork is no longer expected with hydraulic adjustment of compression.

 The body has not decals SPORT PRO or other differences with the standard model, but a special shape of the left panel due to the kick-starter.

 For the standard MP bikes was available a Sport Prodution kit inlcuding Mivv exhaust chamber made in pressed steel (no longer the Giannelli one with welded cones), 28mm carburetor (PHBH 28 RD) as per SP championship rules and its collector and airbox adapter, Marchesini wheels, shock absorber Sachs Boge fully-adjustable. The cylinder was sold, officially, only to riders with a racing license.

The Sport Production "factory" is the maximum technical and performance evolution of a last, not strangled as versions 1993 and 1994 from the carburetor 28mm and definitely more sophisticated of the standard model.

Special thanks to Massimiliano Tesori, Andrea Carrozzo and Enrico Sillari for the valuable and proven information.

  • Foto della cartella stampa del modello 1995 e del kit SP
  • Extrema SP 1995
  • L'adesivo commemorativo delle vittorie dell'anno precedente
  • L'adesivo identico alle "replica": non viene menzionato in nessun modo il modello come SP
  • L'adesivo del telaio con ancora la scritta "extrema"
  • La strumentazione identica al modello standard
  • Il tasto per avviare il cronometro digitale
  • Contrappesi manubrio più piccoli della versione standard (identici alle SP precedenti e ai modelli 50 cc)
  • La leva della messa in moto (qui senza gommino)
  • Il fermo della leva di messa in moto identica a quella delle SP precedenti
  • Cerchio anteriore Marchesini specifico per le SP
  • Cerchio posteriore Marchesini specifico per le SP
  • L'ammortizzatore regolabile in estensione/compressione/precarico e altezza retrotreno
  • Il terminale con l'omologazione riportata sul fondello identico a quello della moto standard

The RS 1996-97 type "MP"

In 1996, the RS lost any "extrema" reference. Compared to 1995, there are not a lot of changes. The decal of the pivot says only "Aprilia RS" and introduces a passenger handle tube that looks ugly. Due to this handle tube the tail is provided with two holes for the fixing. The colour schemes of 1996 are the instant-classic Chesterfield (the lines of the number plates becomes green from the from yellow ones of 1995) and a metallic gray version "Romboni Replica" was introduced. In 1996 it is available in both the full-power version and the limited power to 11 kW in Italy.

 In 1997 there is only a black Replica colur scheme without Chesterfield logos and a silver metallic Replica with red rider's saddle. In 1997 we find the last Sport Pro factory-made.

With 1997 ending the dynasty born of the RS "full power" in Italy.

  • RS 125 1996 Replica Chesterfield
  • RS 125 1996 Replica
  • RS 125 1997 Sport production: Marchesini rims and kick-starter
  • RS 125 1997 Sport production: the kick-starter
  • The decal of the pivot similar to the one of 1994 and 1995, but without the name "extrema"
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