Last month we have talked about the "Pliquet" bros. and their adventures to the "Bol d'or classic", today, let's talk about another of their realization, a first part of two beginning with a frame building.
Since the last few years, I make demonstrations with my Gus Kühn :(Ton Up, Gérard Jumeaux, Coyote Racing team, etc.).. The bike is just modified with a 4s camshaft.
I wanted another motorcycle more Racing and keep the Gus Kühn for the road.
In March 2002, a friend suggested to me a basket case he has accumulated for more than 15 years, as a project to make a racing bike.
This batch consisted of an stock frame, Marzocchi forks, a Norvil tank, a prepared cylinder head with big valves,a 36 mm carb, a high compression piston ,a standard gearbox, a MK III
isolastic, a Norvil brake, a JPN saddle, one Carrillo rod,
a lightened crankshaft and an aluminium alloy primary belt kit.
On November 1st the same year,
I started the bike. Immediately,,I had a big problem
with modified cylinder head and large carbs. The engine was no longer fit into the frame.So I had to find another one.
I decided to make it myself.
I wanted an original motorcycle and I choose to make a John Player model 1974 frame. I found inspiration in JPN and Ducati pictures and I made so many drawings to imagine the shape of frame.
Then I started cleaning up and up fork, a Marzocchi
which should be mounted at the time on a Ducati or Larverda.
Later I bought two front wheels in a scrapyard.
I machined the hub to give it an English look. I mounted new spokes and a new rim a wheel axle and set two disk brakes of ZXR ... with Grimeca calipers making plates in aluminium.
In December, with a clearer idea of the frame's shape and how to achieve it, I began by making a marble with a metal beam ,
to install the original frame as well as the emptied engine. From there I identified the attachments points of the
steering column, the shock absorbers and fasteners engine ...
I removed the frame from marble but I kept the engine with the isolastic support and I have corrected the angle of
Flush of 1°to reduce the bike of 40 mm.
Then I made the isolastics aluminium alloy support and one swingarm with 30 x 40mm tube ,machined sockets, I used to
fasteners on the frame. Finally there I just had to connect
the attachment points with tubes and welded with TIG. Once the frame fully welded, I have withdrawn from marble and have assembled the fork and the swingarm first with Fournales
shocks absorbers that will be replaced later by Koni. I turned a rear wheel axle and milled aluminum plates for the footrests.
Next week: Ready for the Track? "GO"