A great kit, one of the most powerful for minarelli vertical air scooter, it comes in first place with the evolution POLINI 70cc (out kits long races), high-end aluminum cylinder treated nykasil, his bar makes him a very exhaust wide but remains relatively solid thanks to the very high-end treatment MALOSSI, all the same less robust than a normal exhaust (type ATHENA / TPR or a booster exhaust type POLINI). This barrel escapement will offer you a lot of recovery and high speed, however less torque than a normal exhaust. It has a corrected admission as all racing cylinders for vertical minarelli. Its diameter of 47mm offers 68cc real. Have a strong appreciation of his piston which has large side grease that also saves a lot of things in case of big heating, exfoliation, practice on vertical minarelli that has a big tendency to heat, scrubs ...
ATHENA and TPR do not have this piston very studied. It also has a very thin mono segment to obtain a very high regimme, a polished frustoconical high compression yoke, a MALOSSI carbon slat for studied valve, reinforcement reinforced needle cage is supplied in the pack. His diagrams are very good, the finish is not too bad but still a good review for a preparer especially level admission, regret the lack of finish and several base joints to make the squish view the price, but really in summary, it remains the must of the cylinder on normal race with polini evolution. Encor a little more to add, the breech is mounted on O-ring! Excellent on this engine or the common bolt joints loose very often in track racing. It will develop up to 14cv announced by Malossi (according to settings, equipment, preparation), so even more prepared version and fully equipped!
diameter: 47mm
type: alluminium / nykasil
number of transfers: 6 and barrel escapement
Crankshaft stroke planned: 39,2mm (origin)
recommended squish: 0.60 to 0.65mm
compression ratio: 15.2: 1
engine capacity: 68cc
recommended lead time: 16 °
candle recommended: denso malossi W31FS-ZU
cooling: air
We advise to accompany this kit to the MINIMUM : racing exhaust MHR tropheo 70cc, complete kit carburation 21mm, reinforced bearings kit, reinforced crankshaft, cold racing candle
This pack contains :
Aluminum cylinder d.47mm nykasil with barrette
Single segment piston with lateral grease nipples
Curved hard chrome segment d.47mm X 1mm
Needle cage racing d.10 inside
Reinforced piston pin d.10mm
Piston clips (shaft rods) in G
Reinforced full seal pack
Valve leaf 0.35mm
Cylinder head d.47mm high compression frustoconical polished
stickers
Booklet (notice)
Optionally we offer a stage 1 preparation, this preparation is a modification of the channels and exhaust light by increasing the diagrams and improving the pipe, it increases the performance of the cylinder. An improvement of the piston and skirt stocking 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 ...
