Doing
its bit to please both users and the greens.
Going
four-stroke was the primary reason TVS decided to completely redo
the Scooty and transform it into the Scooty Pep. The two-stroke has
made way to the four throws of a completely new engine that displaces
74.6cc. The oversquare bore-stroke layout at 47x43mm endows the Scooty
Pep with tremendous flexibility across the rev range. Making max power
of 4.1bhp@6500rpm and max torque 5Nm@4000rpm, this horizontally laid
out engine is truly a spirited performer. Power from her single pot
is very linear thus ensuring acceleration is crisp and on tap at all
times. Compression ratio at 10.1 is very high and could have resulted
in pinging, what with the quality of fuel we use. The digital ignition
however completely eradicates any such intrusions by optimising the
ignition curve. The engine breathes through a Ucal Mikuni VM14 carburettor.
The engine also runs the same throttle actuated ignition switch first
seen on the Victor, for maximum Fuel Efficiency.
The ignition curve activating switch depends on throttle travel, a
dual curve enabling the rider to switch from economy to power mode
with just a flick. Green (for economy) and orange (for power) blinkers
in the instrument indicate the mode.
Tipping the scales at 89 kilos the power-to-weight ratio at 46.06bhp/ton
ensures she can take on rider and pillion (as long as they are not
of the Hulk Hogan kind).
Torque to the driven wheel is transmitted via continuously variable
transmission, which thanks to its virtue of letting the engine always
operate in its optimum rpm range whatever the speed, helps gain the
most efficiency from the plant.
On the flip side, TVS has resorted to a very lean combustion mixture
to eke out the best Fuel Efficiency.
Cold starts then can be a long-drawn affair in spite of the electric
choke. Getting her up to her optimum operating range is also a tedious
process. In the long run the constant jamming down of the ignition
switch could affect the starter motor or you could put extra wear
and tear on your shoe soles by constant kick-starting her to life.
|