Just some
general info on the Aprilia RS250. Just about every bike that is here in the US is a "cup" bike and can be determined by their VIN. (Not 17 digits) There are a few that slipped in prior to 98 (I had one) that was 17 digit and retained a "street" harness. Lights horn etc.
The whole "CUP" idea was Aprilia trying to introduce the 250 to the US. The easiest way to do so was to start a new series and bring them in as "RACE only". Most US bikes are >98 and are here as a result.
The Bike
Aprilia in traditional style, took an already existing power plant (Suzuki RGV250) and did a little tweaking . Primarily in the castings (they say Aprilia
) and the majority of rgv engine components swap over. The BIG difference is the chassis and swinger which are soley Aprilia and probably one of the best handling /strongest platforms out there.
You'll generally get 54-59 horses out of em in stock (engine) trim and really, that's the best way to keep em. You can trim a LOT of fat with typical "race " add ons, clipons rearsets exhaust . This will most likely have been done. There are a few RGV250 "race mods" that can be done to them that will squeak out some extra ponies but not really necessary. There is a "RGV kit" manual that I think I still have on CD that in the event you get one will gladly forward to you. They're basically jet and forget and if retaining the oiler pump, just gas and go. They run pump fuel (93) and can go 2 seasons between rebuilds.
Cranks are getting quite difficult and pricey to acquire and there is good support for pistons/rings
Try to get a low mileage (crank) bike or rebuilt motor and your golden (chassis mileage is irrelevant)
Apriliaforum is a great place to shop and hang as well. Set an alert on ebay to let ya know when something lists.
They REALLY are fun capable bikes I remember running VIR Patriot with a good buddy ( he was on a cup bike too) and as we came up over the uphill we split some guy on a 600. Scared the Piss out of em. We were "battling" the whole session and as we came in, we were laughing so hard that my buddy fell over in the pit....bike and all! The guy on the 6'er searched us out to laughingly tell us that we spooked the hell out of him and get a closer look at the "weed whackers" that blew buy him. SO MUCH FUN!
Good Luck!