KB Performance, large bore piston kit from 96" to 103". +.030"

For 96" to 103" (3 3/4" to 3 7/8") big-bore conversions. Used with stock heads and cylinders. By boring the stock cylinders from 3-3/4" to 3-7/8", engine displacement increases from 96" to 103". Includes T6 390 hypereutectic cast pistons with 16% silicon, allowing a very tight clearance for greater durability and virtually zero piston noise.
Compression ratio 10.0:1 with 85cc cylinder head. Head type: Flat roof.
+1.9cc / Compression height 1.076".
Bore 3.875" / Stroke 4.375".
Conrod length 7.667".
Note: The top compression ring will require additional clearance. See instructions.


Specifications


Brand
KB Performance Piston


Application
07-17 Twin Cam (NU)


Sales unit
Set


Material
Aluminium


Packaging weight
1.209 kg


HS Code
84099100


Motorcycle family
DYNA, SOFTAIL, TOURING, TRIKE


Original name
KB Performance, 96" to 103" big bore piston set. +.030"