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RB Concept
S7 II
WORLD CHAMPION SPIRIT |
World champion,
European Champion and winner of the most prestigious international races,
the famous RB Concept World S7 is becoming an true legend, means the best
off road engines of the world.
When Rody Roem and the engine R&D dpt.
of RB Products started to develop the successor of the WS7, they have been
inspired by all the experience and the knowledge coming from the
world-famous World S7. Several years of testing were needed to come to the
right balance of the previous WS7 and then new improved WS7II. A new
Bi-Turbo crankshaft SQC* has been tested in the most terrible conditions of
dust, mud and high temperature. Including the exclusive RB Concept Coating,
the new WS7 II has showed the same reliability as its well-known
predecessor. Never an engine has been so much tested during the stages of
its development! Based upon these technical data of WS7, the new RB Concept
World S7 II has also other new technical and exclusive features: |
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Technical
Specifications |
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Type: |
Rear Exhaust |
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Displacement: |
3.5cc |
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Bore: |
16.42mm |
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Stroke: |
16.42mm
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Porting intake: |
7 |
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Porting exhaust: |
1 |
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Crankshaft: |
13mm Bi-Turbo Buggy |
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Carburetor: |
Nylon 8mm Venturi |
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Glowplug: |
1055-6 "Normal" |
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Weight: |
370Gr. |
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Pullstarter: |
No |
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| Crankcase:
This RB Concept WS7II anodized
crankcase has been designed and developed internally and externally by Rody
Roem. The weight has been kept to a minimum and its cooling capacity's to a
maximum, it is more rigid and extra cooling ribs are present on the bottom
of the crankcase to get more efficient cooling. |
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Porting:
Its unique internal 3-ports design
helps the engine to get the best torque available at low rpm and usable
power with good fuel-consumption. The molding of the crankcase is realized
with a vacuum system to avoid air cavities during the molding process.
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Piston/Liner:
The piston/Liner is of the type ABC
chromed and rectified, the piston fits with precision in the sleeve to get
the best performances and a longer life! The sleeve features 7 intake ports.
This sleeve is specially adapted to the porting of the WS7 II using the last
technologies available.
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Conrod: The
Conrod is manufactured from high quality, ultra sound checked aluminum, it
has got 2 special bushings inserted and expanded with the latest technology
available. The aerodynamic designed shape is developed to obtain less
obstruction in the internal gasflow and a special groove is made for better
lubrification performance and reliability.
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| Crankshaft:
The shape of the new Bi-Turbo SQC*
crankshaft gives astonishing performances to the new RB Concept World S7 II
! The timing and gas flow have been specially designed for the off road
specifications. The special drawing of the crankshaft has been studied to
offer the best weight balance possible. |
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Bearings: The
front-bearing of this RB Concept World S7 has got a rubber shield to prevent
dust or water to come into the engine and deteriorating the bearing itself.
The 13mm rear-bearing is of very high
quality and has its line of balls placed more closely to the conrod to get a
better stability of the crankshaft. |
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| Cooling-head:
The new cooling head has been also
re-designed after many tests. Bigger, this new head (with a separate
combustion chamber) improves the cooling and maintains continuous performance
throughout the entire race. |
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Carburetor:
This new improved carburetor is mainly
made out of Nylon to prevent overheating of the fuel coming into the
engine when it is very hot (preventing vaporlock.) The base of the
carburetor has a new steel insert which goes through to the top of the housing, so strength and
stability is assured. At the base this 9mm carburetor has a 8mm venturi and
can receive also the following venturis of 6, 7, 8 and 9mm depending the
power you need and fuel consumption you want to obtain.
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| Glowplug: The
"NORMAL" glowplug RB Concept, specially adapted for off-road use, uses the
same wire as the "Turbo" glowplugs used in high competition and recognized
to be strong and reliable. |
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