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The state-of-the-art LC4 Four-Stroke is the newest model in KTM's 1988 off-road lineup and features water cooling and disc brakes.
All-new 600cc LC4Four-Stroke heads
KTM lineup for '88
Photos by Mike Church
A newly-introduced 600cc four-stroke single
highlighted KTM's new model· introductions when KTM unveiled its 1988 model
lineup during regional dealer shows at the
The LC4 is available in either enduro (pictured) or motocross trim_
The 350 Enduro model features KTM's Tri-Port Exhaust.
20
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end of September.
While the Austrian manufacturer's "carry over" models
t h e 125 , 250 an d 50Occ
motocross models and the 250
and 350cc enduro models - remain
virtually unchanged (with the exception of detail refinements), KTM will
offer one completely new model the 1988 600cc LC4 Four-Stroke.
The LC4 engine, which has been
in development since 1984, is a liquid
cooled, single-cylinder, four-stroke
powerplant with a displacement of
552.9cc. It produces a claimed 50.1
horsepower at 8075 rpm. Engine
coolant is circulated by an electric
waterpump and coolant temperature
is balanced by a 'thermostat. Four
valves are operated by a chain driven
overhead camshaft and control the
~asses within th·e Mahle nikasil
unpregnated cylinder. Carburetion
is handled by a 38mm Del 'Orto.
Starting is made easier with a valve
lift-decompression engaged by the
kick-starter.
Power is delivered to the rear wheel
through a five-speed transmission.
Primary teeth are straight cut and the
clutch is an oil bathed, multi-disc
unit.
~ chr~memoly-st~1 frame with
split engIne cradle IS suspended by
White Power "Upside Down" anticavatation forks with H.8 inches of
travel in the front. At the rear a White
Power Super Adjuster shock and
aluminum swingarm provide 12.6
inches of travel Ground clearance is
14.7 inches, seat height 37.8 inches
and the wheelbase is 58.3 inches. Dry
weight is 253 pounds.
New hubs are connected to aircraft
quality rims and disc brakes handle
the stopping chores. The larger
brake calipers are self-aligning and
floating, allowjng for solid mounted
discs, and have 2mm thicker brake
pads. Flex-free brake lines connect
the calipers to the master cylinders.
The 600 LC4 is available in either
motocross or enduro trim.
There are several new features olil.
thl; two-stroke motocross and enduro
machines. The wheel assemblies
now have high strength alloy rims,
stainless steel spokes, lighter,
stronger wheel hubs and improved
rim/hub alignment.
Acerbis now makes the front
