Unapproved part! Only reserved for competition, circuits and closed tracks.
A very large solid and very powerful kit to be placed next to the TPR aluminum, in aluminum covered with a high-end chrome silicon treatment, revised and corrected admission, diameter 47.6mm, finish worthy of the largest kit, increased cylinder head for a better cooling and high polished frustoconical compression chamber. This kit is a concentrate of performances made in Italy. Having tried it a lot and sold it a lot, it is a really powerful kit, very torquey but which also has a lot of high speed, with good settings, a good squish (several base gaskets are also delivered), you will be able to achieve really big performances.
The pack also includes a set of competition carbon valve slats to adjust the intake with the high engine. It is in Ø10mm or 12mm piston pin to choose from, its silver-treated piston is 100% flat and is in single domed hard chrome segment and adapted to the cylinder (the cylinder head delivered is obviously specially designed for flat pistons), you will be able to see the small preparation on the rear skirt for better sweeping and maximum opening on the sides just below the reinforcement strips. This kit has higher diagrams than the normal (sport) version. ATHENA takes up a huge place with products that are always cheaper, more efficient, clean, and a huge catalog.
Technical characteristics :
Bore: 47.6mm
Compression ratio: 13.8: 1
100% flat piston
Expected stroke: 39.2mm
Actual displacement 69.8cc
power: from 13 to 15hp depending on equipment and preparation
Recommended squish: 0.70mm in 0.9kg clamping
We recommend it with at least : 70cc racing exhaust planned for high diagrams, reinforced crankshaft and bearings, cold competition spark plug, minimum 21mm carburetion, ignition unclamping in order to follow the turns
the pack contains :
X2 carbon valve slats
X5 base gaskets
complete pack of reinforced joints
cylinder head d.47.6mm polished truncated high compression chamber
nykasil aluminum cylinder d.47.6mm special intake normal exhaust
single segment piston d.47.6mm
segment d.47.6 domed hard chrome
piston clips (G pin rings)
reinforced treated piston pin d.10mm or 12mm to choose from
Spare parts :
Piston "axis 10mm"
Piston "12mm axis"
Segment
Cylinder head
Valves
Pack seals
clips + axle Ø 12mm
"12mm axle" clips
piston cylinder without cylinder head
As an option we offer a stage 1 preparation, this preparation is a modification of the channels and the exhaust port by increasing the diagrams and improving the duct, it increases the performance of the cylinder. An improvement to the piston and the bottom of the skirt is also included in this modification. Allow a little extra time for this preparation!
Mounts on :
APRILIA AMICO
APRILIA SR (before 1993 only)
FANTIC BIG WHEEL
CARELLI PONY
GARELLI SR
ITALJET BAZOOKA
ITALJET PISTA
ITALJET REPORTER
ITALJET SCOOP
ITALJET YANKEE
ITALJET ASCOT
ITALJET ASTRA
LEM FLASH
LEM GHIBLI
LEM TORNADO
LEM TORNADO SS1
KOTIR SR
KTM CHRONO
MBK BOOSTER
MBK BOOSTER NAKED
MBK BOOSTER ROCKET
MBK BOOSTER NEXT GENERATION (NG)
MBK BOOSTER CW
MBK BOOSTER SPIRIT
MBK STUNT
MBK TARGET
MBK BOOSTER TRACK
YAMAHA BW'S
YAMAHA BW'S NG
YAMAHA BW'S ORIGINAL
YAMAHA BW'S NAKED
YAMAHA CRZ
YAMAHA CT
YAMAHA SLIDER
YAMAHA SPY
YAMAHA ZUMA
And other models ...
