MR103 camshaft kit

Insert camshaft for 103” engines with original compression ratio from 8.7:1 to 10.5:1
Fits standard unmodified cylinder heads, but is ideal for S&S CNC ported heads
More power across the entire rpm range, better results between 2,500 rpm and 5,500 rpm
Manufactured in the USA
The installer must check the spring closure, valve clearance, and valve-to-piston clearance.
A hydraulic press and other professional tools are required for installation.
S&S recommends using adjustable rods/seals.
The camshaft bearings and seals must be replaced when installing new camshafts.
'99 Twin Cam requires a splined external transmission sprocket (sold separately).
'06 requires high-lift valve springs.



Specifications


Brand
S&S CYCLE


Supplier reference
330-0456


Application
Exhaust, Intake


Intake cam centre
100°


Exhaust cam centre
104°


Intake closure
33°


Exhaust Clamp
22°


Intake duration
226°


Exhaust duration
252°


Intake valve lift
0,585"


Intake valve lift at TDC
0,172"


Exhaust valve lift
0,585"


Exhaust valve lift at TDC
0,177"


Product name
Camshaft Kit


Type
Chain


Units
Kit


Open intake valve
13°


Open Exhaust Valve
50°


Version
MR103