This Italian Flashbike has real amperage behind its high-voltage glitter.
It's called horsepower, the stuff that sparks 11-second quarter-miles and makes
the kind of speed that has the scenery backing up in a hurry. Now who needs to
be Italian to understand that?
Italian sport bike with a twist. Its handling is slow and stable, its ride
stiff-legged, its seating position the classic road-racing hunker-down-on-it,
its mechanical design both interesting and unusual. So what's the twist? This
1982 Jota squirts through the quarter-mile in 11.93 seconds—and its 115-mph
terminal speed, exceptional for any bike, is especially remarkable for a
machine with such long-legged gearing. Only a few muscle-bound Super-bikes
geared 10 to 15 percent lower can beat it: the Suzuki GS1100 and Ka-tana, and
the Kawasaki GPz1100 and KZ1000.
This speed and quickness originate in a series of 1982 changes. Although a
cursory examination will uncover little, the 1982 Jota contains no fewer than
227 component changes. A new cylinder head that's an adaptation of the head used
by the factory on the 1976 works racers is primarily responsible for the
performance increase. The 70-degree valve angle is the same as that of former
models, but the combustion chambers are shallower and the valve heads 2.0mm
larger. These new standard valves are the same works valves offered as a racing
modification since 1976. New camshafts feature slightly more lift, which helps
power at lower engine speeds. The pistons have a flattened dome yet still retain
a relatively high 9.6:1 compression ratio.
Although our pre-production test machine was supplied with spigot-mounted
carburetors, production units will be rubber mounted. Engineers incorporated
rubber mounts not to isolate the carbs from engine vibration but to stop engine
heat from being transmitted to the carbs in hot weather. The ignition advance
curve of the Nippondenso-made solid-state control unit, added in 1981, peaks
very suddenly at very low engine speed —it's not the slower advance of former
Bosch units. As a result, hot intake mixture causes the idle speed to rise
enough to advance the timing, which further increases the idle speed. Laverda
representatives report that the rubber mounting has cured this self-generated
racing idle, which was present in our machine.
The all-roller-bearing engine received a new oiling system. A high-volume
pump circulates large quantities of oil under very low pressure the way previous
models did, but the Jota has a new full-flow oil filter with a disposable
cartridge. The oil passes through a cooler on the frame's front downtubes.
The 1982 crankshaft is also new. The generator, secured by an Allen bolt
rather than a nut, is on the right, and Laverda lengthened the crank's left end
to mount the ignition triggers. Laverda has added an outrigger needle bearing at
the clutch to ensure that the triple-row chain is held in alignment. The starter
clutch, located on the crankshaft, keeps the starter motor's drive chain
disengaged except when cranking.
The sand-cast engine cases, already impressively massive, now have extra
ribbing. The clutch, altered to reduce a rattle when disengaged, runs under an
outer cover with sound-deadening ribs. These modifications help the Jota comply
with EPA noise regulations.
The clutch is now hydraulically actuated, the first clutch of this type we've
ever tried. The lever operates a master cylinder, and a fluid-coupling hose runs
to the slave cylinder in the engine side-cover. The hydraulics can be
retrofitted to earlier 750 models, Mirages and Jotas.
An important alteration in the electrical system has provided much greater
right-hand cornering clearance. A new, smaller Nippondenso three-phase
alternator with increased output replaces the Bosch unit. In the switch,
ignition triggers were moved to the left-hand side, as noted above. Engine width
has been reduced about two inches on the right without affecting left-side
clearance. Extremely aggressive riders can grind the cases, but only after
passing the safe-riding threshold.
Though big, the Jota has a fairly compact seating position. The high and
narrow pegs are close to the seat; the relatively narrow tank provides tuck-in
room for the knees; and the low bars require a short stretch across the tank.
The seat height is remarkable—nearly three feet above blacktop level.Those with
shorter-than-average legs will haveadifficult time maneuvering tight quarters at
toe-dabbing speeds.
For our staff's preferences, the Jota handlebar was too low and too far
forward for long-term comfort. The wind would help keep the rider's weight off
his hands and arms, but the fairing breaks up this onrushing support. The ride
isn't windless, however; the air-stream coming off the bubble catches the rider
at mid-helmet. The bar, though short, is adjustable for angle. In terms of
controllability, the bar is good since the rider can get weight on it, even
though it provides little leverage.
The Jota's short, narrow, hard seat drew the ire of every staffer who spent
more than an hour on it. It's far too hard for normal American riders. The
seat's upward slope toward the gas tank prevents riders, especially short ones,
from sliding forward enough to take the load off arms and wrists. The semi-solo
saddle
does let the rider stretch, but it restricts passengers to little more than a
quasi-comfortable short hop. The 1200 Mirage seat is offered as an option at no
extra charge.
Footpeg and seat positions situate the rider's center of gravity directly
over the pegs. This allows the rider to move around easily. That's a Good Thing
because the bike with its tall profile, heavy steering and short handlebar needs
lots of power-assist from the rider to initiate cornering.
At frisky speeds on twisty roads the Jota's slow and heavy steering response
demands full concentration—the rider must initiate turning early enough to lock
the motorcycle on the desired line. As one staffer insisted, if a rider doesn't
know how to countersteer he'll learn or miss the corner. Once it's on lock, the
Jota has confidence-inspiring stability. Dips and bumps don't upset the Jota's
steadiness; any deviation from an established line in the middle of a corner
requires deliberate, forceful inputs.
Our Jota's front tire—a 4.00H x 18 Pirelli Gordon—added to the bike's
strenuously deliberate steering. The Gordon is an excellent all-around tire,
giving a nice combination of traction and wear qualities at the expense of heavy
steering. Jotas roll out of Laverda's factory with three possible sets of tires:
The mix is about 50 percent Dunlop TT100 and 50 percent Pirelli; half the
Pirellis are Gordons, half Phantoms.
Our sources at Laverda claim the Jota steers considerably lighter with the
100/90V x 18 ribbed Phantom. Our experience with these tires on other
motorcycles would substantiate this. The Phantom, however, doesn't have the
Gordon's large full-lean footprint and doesn't wear as well. Roger Slater, the
U.S. distributor for Laverda Motorcycles, points out that Laverda dealers will
install the standard tires of the rider's choice at no extra charge.
The air-charged, remote-reservoir rear shocks, new for '82, with five spring
preload adjustments, have non-adjustable damping. Although the fork is likewise
non-adjustable, the Marzocchi suspension controls wheel movement very well under
a variety of conditions, providing excellent road-holding and a reasonable ride.
The fork has some stiction, and the ride at the rear is moderately firm for
riders over 140 pounds. In this respect, heavier riders will be the happier
ones.
"Jota" (pronounced "Hohta," for the uninitiated) is the name of an old
Spanish gypsy dance in which one romps gaily in rapid triple time. This Italian
motorcycle version, with its triple cylinders, does its own vibro-jitterbug.
Buzzing is present at nearly every engine speed. Most intrusive is the handlebar
vibration. Our test Jota had its crankpins set at 180 degrees two up, one down.
Laverda has built 120-degree triples, with the crank-pins set in even intervals,
and we would imagine the interest in 120-degree cranks relates to the present
motorcycle's propensity for shaking.
The Brembo front brakes on our test machine required heavy lever pressure.
Nonetheless, sheer stopping power was very good enough to squeal the enormous
4.00-section front tire.
New aluminum carriers mate to Brem-bo's premium lightened rotors and replace
the old integral disc carriers. The components reduce unsprung weight,
significantly easing the task of the suspension units.
The hydraulic clutch lever should be a paragon of lightness, at least in
theory. But, strangely, the lever pull was extremely heavy, and the hydraulics
seemed to obscure the exact take-up point for engagement/disengagement. These
high pull-pressures, together with the engine vibrations, make riding the Jota
long distances wearisome.
The engine has a lot of low-end punch and it pulls eagerly right off idle.
Throttle response is good. At 6000 rpm the engine begins to make power with real
authority and carries strongly to redline. Yet the Jota is deceptive. The power
feels incapable of Superbike acceleration, but keep the tachometer needle
elevated and you'll see the scenery around you back up in a hurry.
It's possible that the Jota can make more horsepower than it actually did on
our dyno, where a combination of too-hot spark plugs and too-rich carburetion
hurt upper-rpm power figures. Since we were supplied with an incorrect primary
gear ratio, our dyno-calculated rpm figures proved four percent high—the engine
produced a maximum horsepower reading of 78.16 at 7690 rpm, well below the
engine's 8500-rpm redline. However, we run engines on the dyno until power
begins to fade or, in the case of the Jota, until misfiring begins.
Incidentally, the Jota clocked its 11.9-second quarter under the same conditions
in which it ran at the dyno.
The Jota comes equipped with two very tidy rearview mirrors that mount to the
fairing. You'll not see them in the accompanying photographs. Sadly, the mirrors
fell victim to the Jota's hurried schedule. First it was rushed to Cycle
for road-test photography, then carted off to an endurance race where it
crashed, and finally after much attention returned to the magazine for a road
test. We never saw the tool kit, but we're told it is very complete. Moto
Laverda went to great efforts to produce a new rider's handbook especially for
the American market. The tool kit fits into an under-seat tray and the handbook
can be carried in the storage area in the seat's tail-section, which, like the
tool tray, is accessible by lifting the hinged and lockable seat.
On balance the Laverda Jota is a narrow-spectrum motorcycle, aimed at the
sporting set whose predilections run to things Italian, and who insist Europeans
know best. For example, they won't find and wouldn't want a sidestand to hinder
cornering clearance or a digital-readout dashboard to distract them. The Jota
has real ground clearance, high-effort rider-input requirements, locomotive
cornering stability, a race-type seating and, perhaps most important, enough
muscle to be a genuine Superbike.