1959 125 LCH
Racer
LCH were the initials of Leonard Clifford Harfield,
a gifted Hampshire-based engineer who built
his own racers. This machine is the ultimate
development of the LCH single on which Len Harfield
challenged the might of free-spending Italian
factories in international 125cc racing through
the late fifties.
The sophisticated LCH engine, with gear-driven
double overhead camshafts and twin plug ignition,
was almost entirely manufactured by Harfield
himself. Basing the unit on a 250cc Rudge crankcase
he crafted the wooden patterns from which a
foundry produced the other main castings of
Italian appearance. Harfield machined most of
the internals but fitted a Hepolite piston listed
for the Italian 125cc MV Augusta and a Manx
Norton oil pump. A special five-speed cluster
was obtained for the separate Albion gearbox.
LCH engines were noted for reliability and this
unit can be safely revved to 11,000 rpm.
This ultra-lightweight frmae is based on the
proven Norton layout, while the front fork is
an Earles-type leading-link type. A glassfirbe
fairing made by Harfield was usually fitted.
This final British-engined LCH took its creator
to 16th place in the 1959 Ultra Lightweight
TT, against Ducati, Honda, MV Augusta and MZ
factory machines. Harfield's best TT was in
1954 when he took an earlier LCH with chain-driven
camshafts to 8th in the 125cc event and was
the first privateer home. After a heavy crash
in 1959, Len scaled down his track activities
and set up a garage business. He returned to
racing as a technical official and was Chief
Scrutineer at the TT for eleven years. Len Harfield
died in 2002.
Engine - 125cc (53 x 56mm) air-cooled double
overhead camshaft single, 11.5 compression
ratio, 1in Amal carburettor, battery and coil
twin-plug ignition.
Transmission - Chain primary drive, dry
multiplate clutch, five-speed gearbox, chain
final drive
Chassis - Tubular double cradle frame, leading-link
front suspension, swinging arm rear suspension,
drum front and rear brakes
Power - 18bhp @ 11,000rpm
Dry weight - 207lb (94kg)
Top Speed - 95mph
|