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2012 Aprilia RS4 125 First Look

Tuesday, November 2, 2010
2012 Aprilia RS4 125 Specs
Aprilia RS4 125
Engine: 125cc liquid-cooled Single, 4-valve DOHC
Bore x Stroke: 58.0 x 47.0mm
Compression Ratio: 12.5:1
Fuel Delivery: Fuel-injection
Clutch: Wet multi-plate, cable actuation
Transmission: 6-Speed
Final Drive: Chain
Front Suspension: 41mm inverted fork; 4.3 in. travel
Rear Suspension: Shock absorber with adjustable spring preload; 5.1 in. travel
Front Brakes: 300mm disc, four-piston caliper
Rear Brake: 218mm disc, one-piston caliper
Front Tire: 110/80-17
Rear Tire: 130/70-17
Curb Weight: TBD
Wheelbase: 53.1 in. Length: 76.9 in. Width: 29.1 in.
Seat Height: 32.3 in.
Fuel Capacity: 3.8 gal.
Colors: TBD
Italian motorcycle marque Aprilia will import a new small displacement sportbike aimed at entry-level sport riders into the U.S. Welcome the Aprilia RS4 125.
Visually, the new street bike is queued off Aprilia’s World Superbike Championship winning RSV4 Factory. It features a liquid-cooled 125cc four-stroke single-cylinder engine. The engine is fuel-injected and features a 4-valve cylinder head and double overhead camshaft valve actuation system. It is mated to a six-speed manual transmission.
The main frame is of a twin-spar aluminum design with a 41mm inverted fork up front and a shock absorber out back mounted directly to the swingarm. Braking components consist of a solo 300mm disc and a four-piston radial mount caliper up front and a 218mm disc and single-piston caliper rearward. The RS4 rolls on 17-inch six-spoke wheels with tubeless tires.

No word on what the bike will weigh but you can expect it to be even lighter than the 375 pound Kawasaki Ninja 250R. Pricing and availably has yet to be announced.

Follow all the exciting new motorcycle releases on our EICMA Milan Bike Show page.

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dognights   April 21, 2012 06:37 AM
So when does this thing come to the US finally. Did they come out with the 450 motard version yet?
Taco -125cc Com'on  January 29, 2011 01:44 AM
This bike looks dope as hell but we need to see some numbers first, like hp and $. However 125cc is way too small for the average super-sized American. A 250cc or better yet a 450cc single would be the bee's knees.
pao -nice bike  January 19, 2011 11:23 PM
this bike look as good as 600cc n 1000cc sportbike. i like to see hp,torque n weight. i am riding a 2007 gsxr 750 now but was looking for 250cc sportbike since i'm only 5"1' n weight 115 lb. unfortunate the ninja 250r and new cbr250rr don't look like a real sportbike. the handle bar is so hight that's the reason i don't like it.
pao -likeit  January 19, 2011 11:11 PM
nice, i like to buy one right a way.
Bob -.  January 9, 2011 04:12 PM
Aprilia, throw a 250 single in there. Why import a 125cc 4t bike? I know it's mandatory for beginners in Europe, but it doesn't make sense in North America. It's so simple Aprilia, please don't mess it up. Ninja 250, CBR250, and RS4 250. If those were my choices, i'd take the Aprilia in a heartbeat. I think most people would, even with a higher price tag.
Yup -make it a 250 and i'm sold  January 3, 2011 08:35 AM
for the US it must be a 250cc minimum - 125cc will just get swallowed up and you can't ride freeways - c'mon Aprilia, don't make me settle for the CBR250...
rahmad -wrong decision  November 24, 2010 05:06 PM
Why they not just make this 4-stroke as a new product category?
Stoping rs 125 (2 stroke) production is killing a legendary light supersport line. How sad...
matt p -would be a cool 3rd or 4th bike  November 2, 2010 09:06 PM
I'd buy one if i already had a garage full of bikes. It would be the ultimate around town commuter. (a bike that would actually save money) Pretty much a rs50 replacement, comes with about as much power as a rs50 with big bore(70cc) kit. 4 stroke, so it should be a pretty durable little bugger. 2 smokes are cool, but why make it if people can't buy them off the showroom floor DOT legal etc. Like others are saying, it would be an awesome bike with the 450 or 550 vtwin.
Janniz -shame  November 2, 2010 05:06 PM
I think that its a shame that they choose to go in the wrong direction... They already had a perfect 125cc in the RS 125!

2 stroke forever!
Tim -Can't sell 2-stroke street bikes in the US  November 2, 2010 04:03 PM
They haven't been street legal since like 1985. And 2-strokes in pretty much any form are banned in California. That said, I completely agree that a 125cc 4-stroke is weak sauce. Aprilia has an awesome 450 V-twin that would be idea in this bike. Probably too expensive to re-work the engine to improve street reliability.
Jim -What would you do with this?  November 2, 2010 02:57 PM
Just not sure who would buy this with a 125 4-stroke and what would you do with it? Well, it would be great on a go-cart track...
c -too ridick  November 2, 2010 02:54 PM
Wow, I think that crosses the line and becomes too ridiculous to be seen on. It looks like a super bike but it sure aint.
TG -Money  November 2, 2010 02:41 PM
It looks really cool. Really cool. Especially as a scooter replacement (in town or less than 50mph). However, I don't see how this thing will be in the same price realm as the Ninja (or even the new CBR250), and it won't be as practical (assuming the CBR is capable of hwy riding like the Ninja). Who knows, I've been wrong more times than I can recall.
Just a prospect buyer -DaNumbaOne Stunna  November 2, 2010 01:34 PM
i just wanted to see HP and weight....everything else i could care less. FAIL
Gads -Should have made it a 250 2 stroke  November 2, 2010 11:53 AM
OR a 450 4stroke
hmm -ff  November 2, 2010 11:02 AM
shoulda stuck to 2 stroke