KB Performance, kit de pistón forjado 1340 Evo B.T. +.030" - PEDIDO ESPECIAL -

Special order: item not in stock at the supplier, ordered on demand. Delivery time may be longer than usual.

Forged piston set. Compression ratio 9.5:1 with 80cc cylinder head.
Piston weight 365 gr.
Piston pin weight 97 gr.
Piston pin diameter .792" / offset.
Cylinder head type: Dome with -8.5cc.
Compression height 1.375".
Diameter 3.4980".
Carrera 4.250".
Connecting rod length 7.440".
Cylinder length 5.550".
All KB forged pistons are made from 4032 alloy, an 11% silicon alloy formed in a forging press. Forging the aluminium provides superior strength and molecular-level structural integrity, after which it is fully machined. The combination of this alloy and the forging process allows the piston to flex under detonation or pre-ignition, offering the best resistance to cracking. Although 4032 alloy has a low expansion rate, it is higher than that of cast hypereutectic. Therefore, KB forged pistons will require a piston-to-wall clearance of approximately .001". The pistons are sold as sets, complete with wrist pin retaining rings, wrist pins and piston rings.
Note: All KB forged pistons come equipped with offset wrist pins / piston pins. There is a front and a rear section on the piston and it must be installed the correct way round. Consult the installation instructions provided with the piston kit before installation.


Specifications


Brand
KB Performance Piston


Application
84-99 Evo Big Twin (NU)


Sales unit
Set


Material
Aluminium


Packaging weight
1.323 kg


HS Code
84099100


Motorcycle family
BIG TWIN, DYNA, FX, FXR, SOFTAIL, TOURING


Original name
KB Performance, 1340 Evo B.T. forged piston kit. +.030"