Honda RC30 marked a huge leap forward in
Japanese motorcycle design. It was the first Japanese bike to
rival the beauty and build quality previously the domain of exotic
specialists like Bimota. When it hit the market in 1988 the press were in
danger of running out of superlatives. And dealers soon ran out of bikes to
sell to the well-heeled enthusiasts who queued up to spend twice the price
of a Suzuki GSX-R on the most talked-about bike for years. And the
talk was certainly no exaggeration. The RC30 combined the light weight,
quick steering and fantastic rider feedback of a race bike with excellent
ride quality, reliability and perfectly stable behavior on even the most
indifferent road surface.
The RC30 - also called the VFR750R, but
everyone referred to it by its factory code name - was based on the
all-conquering full-factory RVF750 Endurance and Fl bike. When Fl gave way
to World Superbikes, one-off bikes like the RVF were no longer eligible, so
the RC was designed from the start as a limited edition road bike, intended
to sell just enough to qualify for World Superbikes. Crucial parts - such as
chassis, engine casings and carbs - can't be changed under WSB rules, so
they needed to be ready to race. In other areas, Honda were free to
concentrate on making the RC30 reliable and user-friendly for the road,
knowing that those parts could be changed for racing if necessary.
The RC's V-four is a superb road engine. It's smooth,
extremely powerful and very reliable. It's also instantly recognisable - you
can't mistake the sound or feel of a Honda V-four, whether you're sitting on
a standard RC30 blipping the throttle, or sitting by the side of the TT
course listening to a tuned example on full throttle. The RC has a rich
droning exhaust note that never really sounds as though it's working hard.
On die road, it probably isn't - even first gear on the RC's close-ratio box
is enough to take you to 80mph, so full load in top gear isn't something the
RC has to put up with very often.
On the track of course, hard work is what it's all about.
A full factory race kit was available from the start - containing everything
from modified pistons to new camshafts and crankshafts - as well as kits
from the many independent tuners who brought their skills to bear on its
complex V-four engine. And the RC30 was born to race. It raised the stakes
in the fledgling World Superbike Championships, dominated the demanding Isle
of Man TT course and became the bike to have if you wanted to get anywhere
in World Endurance. It would be a long time before the other manufacturers
caught up. Visually, the RC shouts its race credentials with its
single seat, its smooth, uncompromising lines and its single-sided swing arm
at the rear.
The latter was designed, like the quick-change
mechanisms on die front forks, to waste the minimum time on pit stops
in 24-hour endurance races. For the road it has no real function except to
look good - and it certainly docs that! Hidden away above it, though, is one
of the most perfectly set-up suspension systems ever fitted to a road bike.
It tracks over bumps as though they don't exist, and it would take a
racetrack to make it misbehave. The forks, too, are well set-up they may not
be fashionable inverted types, but it's the quality that counts. It's
a testimony to the excellence of its design that even now, eight years after
its launch, the RC30 is still capable of top ten finishes at the TT, and
it's still a stunning bike to ride on the road.
Source Super Bikes by Mac McDiarmid
Battle of the
V4s: Honda VFR750R RC30 vs Aprilia RSV4 Factory APRC
What can we say about the Honda RC30 that
hasn’t already been said before. Yes, we’re among the vast number of fans which
the 750cc V4-engined VFR750R still has more than two decades after it was
launched. A mere 3,000 units of this bike were produced between 1987-1990 and
even back then, it cost a massive US$15,000. The RC30’s claimed dry weight was
185 kilos and according to some magazine road tests of the era, the bike weighed
as much as 215kg with all fluids and a full tank of fuel. And by modern
standards, the 750cc V4’s power output was rather ordinary – 112bhp at
12,000rpm, which went up to a more respectable 133bhp with the HRC race kit that
was available from Honda.
If the RC30 wasn’t all that powerful and was a bit heavy, what’s the fuss all
about? More than 20 years on, why is the world still so taken with the VFR750R?
Perhaps there is no logical answer to this question. Maybe it’s the image we
have in our minds, of watching men like Joey Dunlop and Steve Hislop and Carl
Fogarty racing the RC30 around the Isle of Man. Maybe it’s the bike’s sheer
beauty, its racy stance, its single-minded racing focus and the fact that it was
designed by HRC that makes it so attractive. Or perhaps it’s the bits inside
that Honda V4 – titanium conrods, 360-degree one-piece crank, gear driven
camshafts – that make the bike exotic and desirable.
Based on Honda’s RVF750 world endurance and TTF1 racebikes, the VFR750R RC30 was
essentially a ‘homologation special,’ built to satisfy the requirements of the
World Superbikes series which started in 1988. The first batch of 1,000 bikes
was released in Japan in 1987 and sold out quickly, despite a price tag of 1.5
million Yen. The RC30 came to Europe in 1988 and to the US in 1990, by which
time it had already won the first two WSBK titles – Fred Merkel won the 1988 and
1989 World Superbikes championships aboard the VFR750R. Apart from WSBK, the
RC30 was also very successful at the Isle of Man TT races in the hands of riders
like Steve Hislop, Joey Dunlop and Carl Fogarty.
Moving the story two decades forward, things are a bit more bleak for Honda
today. After Fred Merkel’s two championship wins in WSBK with the RC30, Honda
have only won four titles in World Superbikes – 1997 (John Kocinski, with the
RC45), 2000 and 2002 (Colin Edwards, with the RVT1000R RC51), and 2007 (James
Toseland, with the CBR1000RR Fireblade). Technological innovations seems to have
taken a backseat at Honda, even as European manufacturers like Aprilia, BMW and
Ducati have surged forward with some truly stupendous machines. And in 2012,
Honda’s top-of-the-line V4-engined motorcycle is a porky sports-tourer rather a
lean, mean, cutting-edge sportsbike. Sure, the current Fireblade is a thoroughly
competent machine, but it’s nowhere near as exciting as, say, a BMW S1000RR,
Kawasaki ZX-10R Ninja, Ducati 1199S Panigale or Aprilia RSV4 Factory APRC.
Speaking of the Aprilia, their V4-engined RSV4 Factory APRC – which won the 2011
WSBK championship in the hands of Max Biaggi – today occupies the spot which the
RC30 held almost 25 years ago. It’s sharp, edgy, exciting, high-tech and
properly exotic, all of which the RC30 was back then. So, the next thing you’d
think about is, how would the two bikes – iconic machines belonging to two
different generations – stack up against each other? Surely, in terms of
outright performance and handling, the 25-year-old RC30 can’t possibly stand a
chance against the RSV4, which has a bigger, vastly more powerful engine and a
full complement of modern-day electronics, including traction control?
A while ago, Dutch magazine MotoPlus actually managed to do this shootout where
they compared the RC30 with the RSV4. Here are some excerpts from what they had
to say about the two bikes:
While V4 pioneers, Honda, have left their fans – who are looking for a sporty V4
– out in the cold for many years, Aprilia welcome those V4 fans with open arms.
All right, so there is not much wrong with the inline-four – current engines
have reached a high level of perfection, running smoothly and oozing power.
However, a V4 still somehow sounds more exciting, makes the heart beat faster,
boosts adrenaline levels up higher and sounds racier and more exotic.
Twenty years after the Honda RC30 came out, Aprilia have picked up the V4
lineage with the RSV4. Sure, it might well be that V4s are more complicated, but
they have their advantages – just look at MotoGP, where V4s have been dominant
for years. According to Aprilia, the RSV4 is 40% narrower than a comparable
inline-four, which makes for a narrower, more aerodynamic silhouette that makes
inline-fours look bulky.
The RSV4’s engine is a 65-degree V4 where the Honda RC30’s engine was a
90-degree V4, making it primarily better balanced. Still, the Honda’s V4 is not
perfectly smooth – with its 360-degree crank, HRC went for the ‘big bang’ power
effect on the RC30, which purrs like a kitten up until 6,000rpm, but growls and
vibrates noticeably above that. Not that that is bothersome, just as on the
RSV4, which also rumbles and pulses impatiently, but which has a counterbalancer
shaft to smoothen things out.
While the layout of the two V4s is different, there are similarities in the way
they deliver their power. Of course, the RSV4, with 179bhp, is much more
powerful than the 112bhp RC30, but both V4s accelerate cleanly and smoothly from
low revs and have a fairly wide powerband.
The Aprilia comes with a whole arsenal of ride-by-wire electronics and high-tech
bits like adjustable inlet stacks, two injectors per cylinder, a super-quick CPU
that control the fuel injection system and a servo in the exhaust system, for
variable back pressure. These are things that the old RC30 does not have – it
has to simply make do with a race kit; ignition module, hotter cams and an army
of needles, nozzles and springs. The RSV4’s engine also has a higher compression
ratio than the RC30’s (13.0:1 compared to 11.0:1), but the VFR’s strengths lie
elsewhere. To limit friction, the RC30’s pistons were coated with
Teflon-molybdenum, only two piston springs are used and the hollow drilled
camshafts turn on needle roller bearings. Valve stems are a mere 4.5mm, in steel
and the drive shafts were already made of titanium. On the RSV4, it is the other
way around.
Remarkable, too, are the combustion chambers. With a bore of 70mm, Honda
engineers selected 28mm inlet valves, while the Aprilia has 32mm valves with a
78mm bore. The difference between the two is the so called inlet flow-through,
which is determined by valve diameter and valve lift. And that is where the
Aprilia clearly has the better cards, with a lift of 10.2mm. With a free inlet
surface of approx 1,450mm sq., it sucks fresh air via 48mm stacks from an
8.2-litre airbox and two injectors squirt petrol into its combustion chamber
with millisecond accuracy – if need be, up to 14,000 times per minute. With a
52mm stroke, the Aprilia’s pistons then reach an average speed of up to 24.41
meters per second.
The Honda has a 48.6mm stroke and at 12,500rpm, that equates to an average
piston speed of 20.25m/s. Valve lift is 9mm, with a surface of 1,120mm sq square
mm, the airbox is 3.2-liters
and the 35.5mm carburetors – all look modest in
comparison with the Aprilia. The RC30’s carbs did have a special feature though
– an ‘inspection cover’ through which needles and nozzles can be switched,
without the need to take the carbs apart completely.
In terms of throttle response, the Honda is head and shoulders above the
Aprilia! The RC30 is silky smooth and responds to throttle inputs immediately,
while the RSV4 actually comes across as less polished in comparison. And the
Honda’s chassis is also brilliant – immaculate handling in fast sweepers and
almost Ducati-esq straight line stability. But as you might expect, the RSV4
goes beyond that, with imposing precision, surprising flickability and thanks to
its very firm suspension, excellent stability. The Aprilia’s extraordinary
‘balance’ is not just because of the way its engine is positioned in the
chassis, but also because of the fuel tank that runs under the seat as well. In
its day, the RC30 was the best in terms of handling, but today the RSV4 has gone
one better – it feels like a 600cc machine with litre-class power.
One last difference between the two bikes is that back in its day, the Honda
VFR750R RC30 was simply an unattainable dream for the vast majority of
sportsbike buyers. Today, with advances in technology, the Aprilia RSV4 – with
the same amount of exotic V4 high-tech – is more affordable and accessible.