A great kit, one of the most powerful for minarelli vertical air scooter, it comes in first place with the POLINI 500cc (excluding long race kits), high-end aluminum cylinder treated with nykasil, its booster exhaust makes it an exhaust efficient but remains relatively solid thanks to the very high-end MALOSSI treatment, all the same less robust than a normal exhaust. This booster exhaust will give you a lot of recovery and high revs. It has a corrected admission like all racing cylinders for vertical minarelli. Its 40mm diameter gives it a real 50cc.
It also has a very fine mono segment in order to obtain a very high speed, a polished tapered high compression cylinder head, a MALOSSI carbon slat for valve studied, reinforced racing needle cage on greased is provided in the pack. Its diagrams are very good, the finish is not too bad but all the same to review for a good trainer especially at the admission level, we will regret the absence of finish and several base gaskets to make the squish for the price, but really in summary, it remains the must of the cylinder on normal race. Another little more to add, the cylinder head is mounted on an O-ring! Excellent on this engine or the banal loose head gaskets very often in track racing. It will develop up to 11hp announced by malossi (depending on settings, equipment, preparation), so even more in the prepared and fully equipped version!
diameter: 40mm
type: aluminum/nykasil
number of transfers: 6 and booster exhaust
expected crankshaft stroke: 39.2mm (original)
recommended squish: 0.80mm
compression ratio: 14.5:1
displacement: 49.9cc
recommended advance: 16°
recommended spark plug: denso malossi W31FS-ZU
cooling: air
We recommend to accompany this kit at MINIMUM: MHR tropheo 50cc racing exhaust, complete 21mm carburetor kit, reinforced bearing kit, reinforced crankshaft, cold racing spark plug
This pack contains:
Aluminum cylinder d.40mm nykasil with bar
Single segment piston
Domed hard chrome segment d.40mm X 1mm
Needle cage racing d.10 inside
Reinforced piston pin d.10mm
Piston clips (pin rings) in G
Complete reinforced seal pack
Valve blade 0.35mm
Cylinder head d.40mm high compression tapered polished
Stickers
Booklet (notice)
As an option we offer you 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 of the piston and the lower skirts is also included in this modification. Count 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...
