Chain-driven Conversion Camshaft

Allows upgrading the Twin Cam '99-'06 (excluding '06 Dyna Glide) to roller timing chains and replaces spring tensioners with hydraulic tensioners for greater durability.
The listed cam profiles are designed for use with original pushrods; they require the installation of cam plate, oil pump, cam gears and chains and both hydraulic cam chain tensioners from '07-'17 models (these parts are not included and must be purchased separately).
Each cam kit includes a list of required components
Performance should be similar to previous models with the same cam profiles
Manufactured in the USA
Twin Cam '99-'06 engines (except '06 Dyna Glide) cannot use '07-'17 camshafts, as the bearing diameter on earlier engines is .875" and on '07-'17 camshafts is 1.000". The "N" series camshafts have the .875" bearing, but accept the new support plate.
'99-'01 models require an Andrews camshaft sprocket. '02-'06 models must use the original rear sprocket, OEM #25728-06.
The installer must check the spring stop, valve clearance and valve-to-piston clearance.
Bolt-in cams with increased torque in the low and medium range 1700 - 4800 rpm.
Similar to EV23 for heavy motorcycles.
Ideal for heavy motorcycles with standard compression ratios and pistons.
Can be used with original valve springs and tappets.



Specifications


Brand
ANDREWS


Supplier reference
216821


Application
Exhaust, Intake


Intake cam centre
100°


Exhaust cam centre
106°


Intake closure
30°


Exhaust Clamp
8°


Intake duration
255°


Exhaust duration
228°


Intake valve lift
0,498"


Intake valve lift at TDC
0,134"


Exhaust valve lift
0,498"


Exhaust valve lift at TDC
0,121"


Model
N Series


Product name
Camshaft Kit


Type
Chain conversion


Units
Pair


Open intake valve
10°


Open Exhaust Valve
40°


Version
21 Series