The TPR 70cc aluminum kit, also called TOP ALU, is one of the most powerful kits on the market in its category, it has an alloy, a nickel silicon (nicasil) treatment, a high-end S10 alloy piston. Its admission as well as its very elaborate diagrams (see photo) allow it really excellent diets. The piston in d.47,6mm with profiled skirt arrièe has a small preparation of admission as well as with the sides for a better opening with the PMB and a better sweeping (better on admission with the cylinder). In addition, it is in mono segment end reinforced hard chrome domed which allows it very high speeds.
Transfers and exhaust are finished by hand in the Top performance racing factory. It is of course delivered with a reinforced needle cage. Its cylinder head is in polished tapered high compression chamber, the latter is really well calculated, precise and finished. It is one of the most resistant and torquey kits in its category thanks to its normal exhaust and the quality of its surface treatment.
We recommend it to those who want very powerful equipment while having a certain solidity in order to do a lot of kilometers, however for drag, it will lack a bar exhaust or boosters. You can easily reach 11 to 14 horsepower depending on your preparation, your settings and your equipment. We would still have preferred a more dignified finish, piston side oilers and different base gaskets to make the squish on a kit at this price, but for a good “preparer” mechanic, that's not a problem.
Technical characteristics of the TPR kit :
-mm bore: 47.6mm
-expected stroke: 39.2mm
-actual displacement: 69.9cc
- distribution diagrams : exhaust: 192° / intake (pipes): 130°
-compression ratio : geometric: 14.5:1 / effective: 7.8:1
We recommend it with at least: reinforced crankshaft and bearings, D.21mm racing carburetion, racing exhaust, cold spark plug, valves
Top performance racing tips this kit with : nardo replica exhaust, nardo racing transmission cover, complete TPR variator, TPR carburettor kit, extended transmission, TPR valves, cold index spark plug
Contains:
-Reinforced single segment piston d.47.6mm in S10 alloy
-1 reinforced polished chrome segments d.47.6mm
-clips (axis rods) of piston in G
- complete pack of reinforced seals
-piston axis diameter 10mm reinforced
- cylinder head d.47,6mm high compression chamber polished tapered
-cylinder d.47.6mm racing aluminum Nikel silicon normal exhaust special admission
-TPR 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...
