Liquid cooled, two stroke, single cylinder
Light
alloy and barrel with GILNISIL surface coating
Capacity
124.7
Bore x Stroke
54 x 54.5 mm
Compression Ratio
18.0:1
Induction
28mm Dell'Orto carb
Ignition /
Starting
Electronic / electric
Max Power
33 hp @ 11000 rpm ( rear tyre 31.7 hp @ 11400 rpm)
Max Torque
2 kg-m @ 11300 rpm
Transmission /
Drive
6 Speed / chain
Front Suspension
40mm upside-down forks. 120mm wheel travel
Rear Suspension
Aprilia
Progressive System with hydraulic single shock-absorber, 1120mm wheel travel
Front Brakes
Single 320mm disc 4 piston caliper
Rear Brakes
Single 240mm disc 2 piston caliper
Front Tyre
100/80 -17
Rear Tyre
120/80 -17
Seat Height
800 mm
Wet-Weight
135 kg
Fuel Capacity
20 Litres
Consumption average
19 km/lit
Braking 60 - 0 / 100 - 0
12.8 / 40 m
Standing
¼ Mile
14.5 sec / 143.7 km/h
Top Speed
174 km/h
Launched in January 1992 at the Vallelunga circuit, Futura SP, although
strictly derived by Futura 1991, can 'be considered the descendant of AF1 Sport
of 1990 and therefore the result of experience gained by Aprilia in the 125cc
Sport Production championship, where the Noale and its AF1 were the queens of
the category in 1989, 1990 and 1991.
Produced in limited edition, Futura SP represents the swan song of the series
AF1, born with the legendary "Project 108" of 1987 and will replace the new RS
Extrema dignity that is being marketed right in 1992.
Price in 1992: Lire 6,600,000 turnkey.
The bike soon
The Futura line of SP and 'the same as the Futura 91 and color aside, there is
no difference of aesthetic significance.
Cycling
The aluminum frame and swingarm rimgono unchanged compared to the Futura 91,
although the fork is equipped with a new hydraulic parts and a spring more
'suitable for use purely competitive. The news' most 'important' but the rear
damper units now take a very valuable 'Boge with separate gas tank with
possibility' of spring preload adjustment and commands to register the rebound
and compression. Unchanged even brakes and wheels.
Engine
The engine and 'evolution of the Rotax 123 mounted on the Future 91. Here are
the main changes:
* New cylinder (code 223610)
* Carburetor Dell'Orto PHBH 28 RD (compulsory measure as Regulation SP)
* New terminal expansion with carbon fiber
* New mapping electronic valve control
* Carter redesigned ignition and clutch. (The latter to facilitate inspection
and replacement gear oil without removing the hull)
Despite the adoption of a carburetor more 'small, the supply and elongation are
not very different with respect to and' in fact better than it's in no way
diminished the engine character of the SP.
The full-blooded version of the APRILIA AF1 SPORT PRO prove all that size has
nothing to do with it. This 125 is all m
PUT IT THIS WAY, the Sport production has an electric start but I bumped it
off. So much more racy.
How else could it be on a bike that, to Kevin Cortina at least, looks more
like a GP racer than most GP racers? Or weighs 2501b (light but not too
light), or makes the other handling-gymnasts to hand (ZXR400, KR-1S) feel as
agile as aircraft-carriers? Who can blame you for insisting on being called
Loris or Bruno and for crying a lot? This is normal Aprilia behaviour,
completely over the top.
In Italy the Sport Pro is flagship to the Replica, Futura and unfaired Europa
125s in a market fickle even by that country's standards. Mono-arms, upside-down
forks and crispy-crackly replica spannies mean everything to stroker aces there;
you can't patronise them with duff clobber. Discs must be floating, calipers
must be multi opposed-piston, frames must girder-like ally beam affairs. Aprilia
125s have it all and the Pro has a bit more besides: wider rear rubber — a
140-section Sportmax radial no less, a close(r) ratio six-speed box, and a
redesigned tailpiece with a larger pillion perch. It succeeds the Futura in the
UK at last year's Futura price. This one is unrestricted, which is important.
On a strangled 12 horse Suzuki RG, 125 riding is all a bit of a perverse
giggle. Tiny, cramped riding position, naff-all power; what else can you do but
play silly buggers? The hard-earned buzz comes from eeking out the last few mph
and from beating traffic with slipst-reaming and last gasp brakes... Good but
odds-shortcning fun.
A 33bhp 125 .is different. The same rules apply as regards momentum riding
and screaming it silly. But they apply at another level - up at 95, lOOmph and
deep into the territory of landmark 250s like the lock-up-yer-daughters 35bhp
250LC. On the Pro you plant your chin on the tank for the hell of it and because
you want to, not because legislation demands it. I did it because playing at
Dusky Genius, 125 star, beats playing at World Superbikcs any day. Ask my
licence.
In conflict with this tiddler-racer image is the Pro's classlessness - its
capacity defying size and feel (and expense). A clever riding position
accommodates six-footers as well as it docs midgets; dropped bars and raised
pegs somehow manage to be generously roomy and wide (the bowed mono-arm splays
the pegs). The seat's been designed and the bum-rest is yards back. It makes you
sit knock-kneed (the tank is narrow) but sporty-relaxed with room to manoeuvre.
There's a big view too: white faced Vegila tach', a speedo which looks like it
shouldn't be there, and efficient Honda-esque switchgear.
It feels like a 200cc KR-1S and initially disappoints because it doesn't go
like one. The carburation hasn't the accomplished sophistication of an RG or
TZR125 let alone a free-revving 250 twin. Nor is it helped by a twistgrip that's
slow to close — not always where you think it is. Power is unstable on a cracked
throttle and hunts on a closed one. If the throttle's going in the right
direction, RAVE assisted delivery is useful beyond 5000, crisp at 6500, and then
zaps from 8500 up to 10,500. It's hard to describe really; yes, the Pro's quick
like no other 125 I've ridden but, no, despite its 33bhp at ll.OOOrpm that
addictive stroker drug — that Snap — is missing. ■ The KR-1S is only 331b
heavier yet packs nearly double the horsepower, and that has Snap. The Pro's not
even as exciting as was the similarly-powered 250LC, and that had 501b of extra
flab. Reality is that a modern 125, especially one with RAVE exhaust valves to
smooth and sanitise any peaky rough edges, delivers not in rushes but from
immaculate riding and gearboxes. The Pro's six-speeder has three tall bottom
ratios (7000rpm to launch in first), three close top'ones (it won't rev-out in
useful top) and a shift as quick and light as any. And I've just remembered that
the LC was exciting because its chassis was barely fit for 20bhp. The Pro's
wouldn't notice 50.
Yup, remove those rose-tinted specs, establish that it isjust a 125 and it's
furious fun. The first three gears need the light but late cable clutch to ease
the transmission's angst, then it's left foot only as the ripping spannie turns
on the adrenalin taps. The tacho kisses 11,000, back down to 9000ish (top of the
torque curve), back up at 11 before you can blink, the 'box wasting not a drop.
150kph comes easily, the tank tingles, then the pegs and finally the bars as
power tails off at the redline. The effective fairing wobbles around alarmingly
taking the clocks and mirrors with it. You're tucked in, you're laughing; you
brake, you pull up 10 yards before corner. Blimey.
Head-banger
Damn, forgot it was a 125 again. Easily done because the Pro's straightline
stability is another capacity defier- real big-bike stuff which I accepted
gratefully. When you engage cornering mode, braking, steering and body language
have to switch back to speed-preserving 125cc head-banger tactics.
The Pro actually steers slower, less from the front wheel than, say, the RG.
It also holds its line over bumps which get lighter or more cheaply suspended
bikes twitching. But it's still a 125 — rapid, responsive and phenomenal on the
brakes. The suspension is non-adjustable and it works. For my stone it was soft
enough to absorb almost everything, controlled enough to keep it taut. The front
brake gives a hard, aftermarket-braided-hose feel via a wide-span lever which
makes rationed sweeps of the disc - what it needs - tricky to seperate from
nut-crushing stoppies. Once sorted I knifed through turns with more precision
than ever before. Fast in, fast out. Usually.
Surprisingly, the limit is the Sportmax radials. Despite the rear's nominally
wide size it's fitted to a narrow rim and doesn't seem to work as it should. It
feels skinny, precise too, but grip tails off disappointingly early. In the wet
they were faultless and, hey, a 140 on 125 - who cares about grip!
Headwinds are a chore, so is the pressure necessity to go for it on days you
want mere transport. Otherwise the Pro is practical enough even if the fuel
warning light blinks on at a paltry 90k (plenty seems left in the tank,
but who's going to risk much further?). The oil tank under the pillion scat is
easy and there's room in there for both a bottle of your fave two-stroke oil and
an unlined one-piece. The neat chain adjuster is a doddle: undo two pinch bolts,
insert a locking tool through the wheel hub and spindle carrier, then turn the
wheel to get the right tension. (The dealer who stung a local learner £15 for
five minutes' work needs a good smack.)
Doubts surround its fragility and the top-end's ability to sustain 10,000rpm
plus action for thousands of miles. But what's the price of a piston and rings
compared to a tappets-job on a ZXR? About the same probably. It's about time
bikes like this got a break; the Sport Pro is classless, as good and as much fun
as most 750s and beats the insurance vultures too.
Recommended to speed junkies with sick licences. O
Source Bike Magazine1992
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