KB Performance, large bore piston kit for 88" to 95". +.040"

Big bore conversion from 88" to 95".
Compatible with stock heads and cylinders.
By boring out the stock cylinders from 3-3/4" to 3-7/8" (big displacement), engine capacity increases from 88" to 95".
High compression (pop-up).
Compression ratio 10.5:1.
Piston weight 437g.
Piston pin weight 97gr. / Head type: Domed.
Dome -11.2cc / Compression height 1.270".
Bore 3.875" / Stroke 4.000".
Conrod length 7.667" / Cylinder length 4.938".
Includes heat-treated T6 hypereutectic 390 cast pistons with 16% silicon, allowing a very tight clearance for greater durability and virtually no piston noise.
Note: The top compression ring will require additional clearance. See instructions.


Specifications


Brand
KB Performance Piston


Application
99-06 Twin Cam A/B (NU)


Sales unit
Set


Material
Aluminium


Packaging weight
1.361 kg


HS Code
84099100


Motorcycle family
DYNA, SOFTAIL, TOURING


Original name
KB Performance, 88" to 95" big bore piston set. +.040"