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CRX 32–SV, CMX 32–SV, CR 31–SV E
CM31–SV, THESE ARE THE ACRONYMS WHICH IDENTIFY THE RANGE OF
BIREL CHASSIS FOR THE 125CC CLASSES WITH GEARBOX. THE WHOLE LINE
WAS DEVELOPED BY BIREL’S RACING DEPARTMENT WITH THE
IMPLEMENTATION OF SOME IMPORTANT AND EFFICIENT TECHNICAL
NOVELTIES.
Birel has four models for the
gearbox classes: two models of the R line (CRX 32–SV and CR
31–SV) and two models of the M line (CMX 32– SV and CM 31–SV).
Chassis identified with the acronym
32 mostly utilize 32mm rails, whereas the 31 versions are
constructed with mixed 30 and 32mm rails.
For the chassis of the 125cc range,
Birel Motorsport put a lot of work into optimizing the
performance of the bodywork, which feature some substantial
structural novelties. The results achieved ensure better balance
than the last season’s models and a great compromise between
grip and smoothness has been found.
These results were possible also
thanks to the efficient solutions applied to the front-wheel
assembly; the ‘Cs’ of the small spindle, as well as the camber
and the caster have been completely renewed. Cornering has
significantly benefited from this, without upsetting the total
balance of the chassis. In the front, the fastenings for two
different torsion-bars have been provided for. And at the rear
changes were made to the axle’s flanges and on the bearings, and
the ranges of adjustments have also been increased.
The 2007 range too, particularly
with reference to the R series, is consistent with one of the
characteristics of Birel’s chassis, which guarantee great
adaptability to different types of tires and tracks.
Among the strengths of Birel’s 125
karts are undoubtedly the braking systems which, in the gearbox
categories, are of critical importance.
All the 125cc range features top
accessories and great attention has been paid both to functional
and design elements. Each karts comes complete with a Motorsport
PVC decal kit.
As to model selection criteria,
giving advice is hard as a driver’s driving abilities could be
better expressed with one chassis rather than another. According
to the general guidelines of Birel’s Racing department, the CR
32 and CM 32 versions are most effective with medium/hard tires
and on slippery tracks. For National and International events
which provide for the use of soft tires and on dry tracks on the
other hand, the CR31 –SV model is advisable.
<< THE 2007 RANGE IS CONSISTENT
WITH ONE OF THE CHARACTERISTICS OF BIREL CHASSIS, WHICH
GUARANTEE GREAT ADAPTABILITY TO DIFFERENT TYPES OF TIRES AND
TRACKS.>>
Changes
At the front two different torsion-bars can be
adopted: the one further back gives more grip to the rear,
whereas the second one improves the grip at the front. The ‘Cs’
of the small spindle, the camber and the caster are also new and
give better grip at the front without jeopardizing smoothness.
The pitch of the rear bearing’s flange on the other hand can no
longer be adjusted, in-depth tests having proven the 1040 to be
the ideal pitch. At the rear, the bearing housings can be
fastened vertically in various positions: the lower they are
fastened, the higher will be the grip. The new flange also
houses the ‘hybrid’ 50mm-diameter bearing: its external diameter
is smaller in order to improve smoothness and reduce weight.
Design
One of the main characteristics of Birel’s karts is their
design. As far as this is concerned, users are becoming
increasingly more demanding and the market awards those products
which can differentiate themselves in terms of personality,
image and, naturally, technology. Many accessories are anodized
in blue and great attention has been paid to even the smallest
details. A practical example of this is the excellent
workmanship of the braking systems.
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