Moto 2L

The Moto 2L was a brainchild of Patrick Lang of Sarthe county- France
Together with friend Henri LaPorte (the second L) they made this very
special racebike: Patrick Lang tells his story which starts in 1977:
"It is important to know that my passion is primarily mechanical and not
riding a bike. Following largely explains "my career" with motorcycles.
My first realization was the PL1, a Minarelli 50 engine in an Italian?
mopedframe. I raced this bike a few times in 1977."
"Mid season, following the high number of failures on the Minarelli
engine, I bought an aircooled Kreidler with rotary valve. As the
PL1 frame was not appropriate, I mounted the engine in a 50cc
Peugeot BB road frame."
"For the 1978 season, I decided to build my first real racing
frame in order to adapt a Kreidler engine with the complete
Van Veen liquid kit."
"In 1979 Henry and I created “L’écurie 2L”: Lang + Laporte = 2L.
For this we used a Scrab chassis with Van Veen kittet engines.
I start my first major modification on engines:

A spécial cylinder head with removable combustion chamber.
I would use this head on all Moto 2L engines.

Modifying the right Kreidler crankcase to be able to extract
the gears, without removing the engine off the frame. The goal
was to easily adapt a lot of ratios depending on the circuit."
"During the winter of 1979 I was immobilized following an operation of my
arm, due to a fall at Ledenon. That winter I designed the
chassis and engine of the future Moto 2L. Worked much during
winter to build 2 bikes:

Henry’s bike:
Frame Moto 2L, Engine based on Kreidler cranck, transmission
and clutch Moto 2L, Kreidler cylinder, cylinderhead Moto 2L.
This machine keeps spoked wheels.

Patrick’s bike: Frame & engine Moto 2L with Campagnolo wheels. Both bikes had
nose- mounted radiators Bultaco- like.

Result of the season:
Henry Laporte: Second in the french hill climbing championship."
After a 1980 season well used for development, the results now arrive.
On Patrick’s bike, the radiator is back in a more traditional
position with a new fairing, to obtain better engine cooling.

Result of the season:
Patrick Lang: 2nd at the french hill climbing championship
and 5th in french international.
Henry Laporte: 4th at the french international championship.
Just a few races this season because of Patricks professional activity.
Patrick wanted to focus on the preparation and find a good
driver for the 1983 season, the last season for 50 cc class.
Paul Bordes ride the first time the Moto 2L at Magny-cours.
He is leading the race but he had to stop during the last
lap, due to a water leak.
Technical description:
Frame made of 25CD4S brazed tube.
Tank, seat and fairing in composite
Hydraulic discbrakes front and rear.
Rear suspension with single shock absorber.
Crankcases machined from solid aluminium.
Casette transmission with several ratios available.
Maximum rpm: 18 000.
Carburator Mikuni or Gurtner of 30 mm diameter.
Power 18 hp.
Maximum speed: 180 km/h.
Michelin tires.
Bike was designed by Patrick Lang advised by Henry Laporte.
"Main focus this year was the French championship.
Only one Grand Prix was programmed, the goal here was to
qualify for the French GP. But surprise, Paul realized a
good qualifiying in finished in 7th place. After that GP
we decided to focus on the world championship. For the
next GP we decided to fit a new generation Hummel cylinder
to increase power. Adviced by Hans Hummel, both a
cylinderhead and exhaust were required, and increased rev
range to 18000, to obtain more power.
For all GP´s Paul qualified without problems, the power
was there. But at every race, he was last of the line
and had to perform extraordinary to get back into the
leading group of the race. If he could make better starts
he probably would finish around 5th place, but...."
Result of 1983 season:
15th in 50cc world championship
France 7th
Italy 10th (practice 12th)
Spain 13th(practice 12th)
Yugoslavia out
Germany 13th (practice 15th)
San Marino out
Holland 13th