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Australian
Motorcycle News |
Vol. 47 No 23, May 15-28, 1998
Crazy Albert's MV
Racer Test
By Alan Cathcart
Albert Bold is one of those
do-it-yourself engineers who borders on
the edge of eccentricity.
I wouldn't call Albert Bold
eccentric, more just plain crazy. How else can you explain that
messianic light shining in those deep, blue eyes - proof of his
abiding love for all things red, loud and Made in Italy.
A John-Boy Walton lookalike, some
years on and thin on top, Albert's craziness manifests itself in all
sorts of ways, and is mostly to do with two wheels.
Not many people in the USA use the
bike they go vintage racing with to commute to work on a daily
basis, still less when it's a tricked-out four-cylinder MV Agusta
special with open megaphones and a first gear high enough to break
the speed limit on the Pennsylvania Turnpike without shifting up.
Crazy Albert does.
Equally few people are such
committed street squirrels they'd rather ride everywhere at full
tilt, even in a land like radar infested USA. Crazy Albert does.
Still fewer people are skilled
enough machinists to scorn the idea of buying hardware like brake
discs or exhaust pipes off the shelf, preferring to manufacture them
themselves - like Crazy Albert does. Which is how come the city of
Philadelphia came to find itself short a few cast-iron manhole
covers, which Albert gradually ground down into brake rotors for his
MV.
As for the MV's exhaust headers,
they come courtesy of some tubular ladders from the local swimming
pool.
LARGER THAN LIFE
When I first wrote about Albert Bold
after testing his MV Agusta vintage racer more than a decade ago, I
know many people who'd never met him were convinced I was
exaggerating: "This guy's not for real, surely?!"
Those who know him on the other
hand thought the story rather understated - Albert is one of those
genuinely larger than life characters America seems to produce.
Well, some years on, Albert's
moved onwards and upwards. He and his long-suffering partner no
longer live on the wrong side of the tracks in one of the more
questionable neighborhoods of Philly, complete with TIG-welder,
tube-bender and other engineering equipment crammed into the
basement.
Albert has now relocated to a
small farm in the rural Pennsylvania countryside, but he still
produces metalwork that can only be described as an art form.
He has earned a top reputation
among that most demanding of engineering fraternities, the drag
racing establishment - as well as amond many North American
Superbike teams, and historic racing pacesetter Team Obsolete.
He still has the remains of
half-a-dozen late '60's MV 600cc fours littering his storeroom,
including that unloved and unlovely square-headlamped model, which
may well have been the first four-cylinder across-the-frame
motorcycle to be offered in series production form for the street.
GRAND PRIX ROOTS
Underneath that ugly duckling
exterior, though, lay some GP-class engineering. The mid-60's MV
Agusta 600 was hand-built by the same team that brought Count Agusta
so many race wins and world titles over a quarter-century of
competition, and defeated Honda's best efforts to win the 500cc
world title.
Such heritage explains Bold's
fanatical desire to go racing with a more modern MV - the same
desire that drove Clausio Castiglioni and his brother to found the
Cagiva operation 20 years ago and build their own red and silver
500cc racer after failing to acquire the defunct MV Agusta race
team.
"The MV has so much mystique
attached to it," says Albert, whose passion for the marque
first saw the construction of the 600-based MV Agusta special that
took him to two successive Vintage racing titles in the mid-80's.
"You can pull a stock MV out
of the truck in any race paddock and people will flock to it, just
because it's an MV.
"After I built the first one
and did some good with it, I always had the idea to go a stage
further and build my own chassis, maybe a little more modern and a
lot lighter. It's kind of like my own rolling calling card, to show
the work in various metals that I can do.
"Originally I was going to
buy all the good stuff from Italy, but then people kept coming by
and saying why didn't I make my own brake calipers and exhausts,
stuff like that. So I did!"
LONG TIME COMING
"It took far longer than I intended - but
I've had a real good time creating my own personal motorcycle around
the engine I respect most in the world - an MV Agusta."
His old title-winning racer scaled
a massive 215kg dry, while the stock 600 MV frame it used kept
cracking the front downtubes under the braking forces generated by
the combination of modern sticky tyres and those manhole-sourced
brakes.
"This time I used 4130
chrome-moly steel tubing with as much triangulation as possible, and
tried to run the frame tubes close to the engine to give it more
rigidity," says Albert. "The frame doesn't flex like
before and at 6.8kg it's a lot lighter."
At the same time, he increased the
wheelbase from the stubby 1370mm of the first bike to a
longer-legged 1450mm, though without really improving the very
cramped riding position - something I found for myself when I came
to sample the Bold MV Agusta Superbike on only its second visit to a
racetrack, at Loudon, New Hampshire.
Considering Albert's even lankier
than I am, I can't quite figure out how he gets all his limbs in the
right places. However you do it you can't help but end up with your
chin over the triple clamps and your knees up around your ears.
EXOTIC MATERIALS
The bike is very small and low
compared to other four-cylinder MV roadster-derived bikes, but
Albert's succeeded in putting his new creation on a diet compared to
the old one - it weighs 151kg with a 50/50 weight distribution, a
massive 40 percent lighter than the old bike.
Slashing the weight has been
achieved (in spite of the heavy sandcast crankcases and other
tooroom components in the MV engine) thanks to Albert's use of some
pretty exotic metallurgy for what is after all a home-built special.
The rods and torque arms for the
MV's mechanical anti-dive system - first used in the mid-'70s on the
Geitl/Schuster BMW Superbike (and later copied by Kawasaki on its
500cc GP bike) - are made in titanium, as are the jackshafts driving
the oil pump and Scintilla Vertex magneto, and the front and rear
brake assemblies, including the self-made titanium calipers.
It doesn't end there. Bold also
painstakingly milled the clutch and brake levers, the brake
master-cylinders and the 35mm Marzocchi forks' triple-clamps all
from solid billets of aircraft alloy, as well as the front hubs, to
which he laced a pair of 18-inch Akront rims, again to comply with
Vintage racing rules.
Albert also made and toothed his
own range of rear wheel sprockets, and in spite of never having done
any panel-bashing before, also made the alloy tank and seat. All
that's before he even took a look at punching out the engine to
somewhat more than the 600cc of the old bike.
BORING WORK
The stock five-speed gearbox is
retained but with a Magni chain-drive conversion replacing the
incongruous shaft final drive of the street MVs. The bottom-end of
the engine is mainly untouched too, with standard conrods and
six-bearing crank.
The engine therefore retains the
600 MV's 56mm stroke, but combined with a set of MV 750 America
cylinders bored out to 10 thou' first oversize and fitted with 67mm
America pistons the capability is now 788cc. Albert then reshaped
the combustion chambers and contoured the pistons to suit the larger
bore.
Honda racing valves and springs
are used, with a Magni racing inlet camshaft and stock MV inlet used
on the exhausts, thus offering more lift. The central gear train
driving the camshafts has been substantially lightened, but
compression ratio is very low - just 9.8:1 - as Bold can't skim the
head with the gear cam drive.
The Scintilla magneto replaces the
original heavy and bulky coil ignition, though it too is rather
weighty and could surely be replaced with something more modern and
electronic.
Every gear in the street gearbox
has been painstakingly lightened, while the multiplate oil-mist
clutch now consists of a 600 basket with 750 spline gear.
The America has one more plate
than the 600, which Albert has fitted (necessitating an alloy spacer
on the side cover) to accept the tuned engine's extra power,
estimated to be 95ps at the rear wheel, at 11,500rpm.
A BOLD PHILOSOPHY
The sheer amount of work entailed in
creating this motorcycle - more than 2000 hours, according to a
rough guess - is a tribute to Bold's philosophy of no bolt-on parts
if he could do it himself.
"About the only corner I cut
was the brake discs," he said. "Those manhole covers
worked great on the first bike, and the material was free - but I
just couldn't face the 40 hours of machining work to make each one,
so this time I compromised and used Mercedes-Benz' discs on the
front, which I machined down to size, and a Subaru one from the
local parts shop on the back.
"However, I had figured on
using Magni exhausts, with that upswept line modelled on the old GP
bikes. But they were pretty much unobtainable, so I thought what the
hell, I'll make them myself. So I used the swimming pool ladder
tubing to make the downpipes, then rolled some cones up, packed them
with sand and started working on bending them myself. They came out
pretty good, considering it was my first time.
"I learned a lot making this
motorcycle, but most of all I learned there's nothing you can't do
if you set yourself a goal and tell yourself you can achieve
it."
WEIRD SEATING
At the time I rode the bike it was
still very new and needed a lot more sorting. That riding position
is so weird, it detracts from whatever benefits the chassis might
offer, simply because it makes the bike so hard to steer. You can't
ride it with any degree of confidence.
Even Albert admits it's
uncomfortable, so he needs at least to rework the relationship of
seat, footrests and hand controls - then serious development can
begin.
At that point, the problems posed
by having rock-hard suspension front and rear might be resolved,
though to be fair there's not a lot he can do at the back because
vintage racing rules require twin-shock rear ends. Still, I never
cared much for the piggy-back Marzocchis when I used them on my
V-twin Ducati racers two decades ago.
The 35mm forks from the same
company, though unsophisticated by modern standards, ought to work
better than they do on the Bold MV. Some work needs to be done to
dial them in, while at the rear a set of Hagon shocks would not only
look more authentically period, but would also work better, too.
Still, on smoother track sections
the Bold bike steered well, with the Magni chain-drive conversion
removing the weave and power understeer you get with MV shafties
ridden hard on the racetrack.
Really though, the imperfect
suspension setup denied fair comment on the handling of the Bold
chassis, especially as the brakes also felt rather unresponsive.
EVOCATIVE SOUND
Part of this is certainly due to the
mechanical anti-dive system, which makes the MV brake very flat and
eliminates much sensation of stopping, even though the Spanish
Galfer pads fitted to the Bold calipers in fact pull the bike up
quite sharply.
I've ridden bikes fittted with
this system before, which suffered from the same problem, and
refining the anti-dive by adjusting its linkages would definitely
improve this.
But all this is subservient to the
main feature of this motorcycle - that wonderful engine with its
haunting, evocative exhaust note.
Listening to Albert warming the
unsilenced engine, with the basso profundo beat tromboning from the
four open megaphones interspersed with the occasional high-pitched
wail as he surfed the revs by blipping the throttle, sent shivers
down my back in the bright New Hampshire sunshine.
Close your eyes, and it's Monza
'65 all over again, with Mike the Bike about to embark on another
solo run to the chequered flag in another GP, pursued by a phalanx
of British singles.
Thanks to those open exhausts and
the more extreme valve timing, the Bold MV won't run cleanly below
5800rpm, popping and banging like a
Fiat with a burnt exhaust
valve rather than howling like a two-wheel Latin thoroughbred.
DEVELOPMENT CYCLE
But then at just under 6000rpm -
especially if you help it get there with a touch of the clutch lever
- the MV clears its throat, spits one last time through the pipes,
then takes off strongly in a glorious fanfare of sound from the
exhausts and engine, which with all the straight-cut gears is far
from silent, in best MV tradition.
With the carburation of the four
28mm Dell'Ortos still not yet sorted, it wouldn't quite pull the
11,500rpm redline, but from 7000rpm to just under 11 grand there's
truly impressive acceleration - even by the musclebike standards of
the mid-'70s. Coaxing it even higher proved the power didn't fall
off at peak revs.
Just like the MV Agusta F4,
finished only a couple of days before being unveiled at last year's
Milan Show, Albert Bold had only done half the job by the time I
rode his US-built MV. Still to be undertaken was the equally
time-consuming and laborious process of development.
But just as I'm sure Cagiva's
R&D team will get the F4 in fine fettle by the time it enters
hand-made production, so too Crazy Albert will have surely ironed
out his MV's youthful inadequacies.
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