EVO: Engine Mechanicals

Rocker Box

Sub Documents

Rocker Box Part Numbers

1986-Up Sportster Rocker Box Part Numbers
(Note: an asterisk (*) next to a number indicates that part number is an updated version and not the original part number)
Year ModelLower Box
Part#
Lower Box
Casting#
Middle Spacer
Part#
Middle Spacer
Casting#
Upper Cover
Part#
Upper Cover
Casting#
1986-1988 All17532-86
*17532-86A
17554-86
*17555-86A
17533-86
*17533-86B
17555-86
*17580-95
17501-86
*17501-86A
17556-86
*17556-86A
Notes:17532-85 lower box does not have oval shaped holes on the pushrod side.
(crankcase air escape route to heads)
17554-86 middle spacer doesn't have provisions for head breather umbrellas.
None of this is needed since 86-90 models breath through the cam cover.
But it's important to note that these parts can only be used on 86-90 models.
1989 All17532-86A17554-86A17533-86A17555-86A17501-86A17556-86A
Notes:On L89 lower boxes, Click Here to view TSB M-984 regarding sealing area around middle spacer.
1990 All17532-86A17554-86A17533-86B17580-9517501-86A17556-86A
Notes:Polished set.
1991 All17532-86A
*17532-86E
17554-86A17533-89
*17533-90A
17501-86A
*17501-86B
17556-86A
Notes:
1992-1994 All17532-86A
*17532-86E
17554-86A17533-90
*17533-90A
17555-90
*17580-95
17501-86A
*17501-86B
17556-86A
*17581-95
Notes:Polished set.
1995-2003 All except
883R, 1200C, 1200S)
17532-86B
*17532-86E
17579-9517533-90A17580-9517501-86B17581-95
Notes:Polished set.
1996-2003 1200C17537-96
*17537-96C
17579-95
*17579-95C
17538-9617580-9517551-9617581-95
Notes:Chrome set.
1998-2003 1200S17614-98
*17614-98C
17579-95
*17579-95C
17533-90A17580-9517527-9817581-95
Notes:Silver powder coated set.
2002-2003 883R17532-86B
*17532-86E
17579-9517535-02 17501-86B
Notes:Polished set.
2004-2006 883,
883C, 883L
17532-86C
*17532-86E
17579-95B N/A 17501-0417581-04
Notes:Polished set.
2004-2006 1200C17537-96A
*17537-96C
17579-95B
*17579-95C
N/A 17551-0417581-04
Notes:Chrome set.
17537-96A and 17537-96B lower boxes have slots in the gasket channel on the valve side of the box.
The slots can cause gasket leaks and lower box ..537-96C (no slots) replaced them both.
Click Here to view TSB M-1168A in the Sportsterpedia.
2004-2005
883R, 1200R
17614-98A
*17614-98B
*17614-98C
17579-95A
*17579-95B
*17579-95C
N/A 17527-04
Notes:Silver powder coated set.
2006 883R17614-98A
*17614-98B
*17614-98C
17579-95A
*17579-95B
17579-95C
N/A 17655-05
Notes:Silver powder coated bottom, black powder coated top.
2006 1200R17645-06
*17645-06A
N/A 17655-05
Notes:Black powder coated set.
2007-2009 883, 883C,
883L, 1200N
17532-0717579-07 N/A 17501-0417581-04
Notes:Polished set.
2007-2009 1200C,
1200L, XL50
17537-0717579-07 N/A 17551-04
Notes:Chrome set.
2007-2009 883R, 883N17614-0717579-07 N/A 17655-05
Notes:Silver powder coated bottom, black powder coated top.
2007-2009 1200R17645-07
*17645-07A
N/A 17655-05
Notes:Black powder coated set. -07A is wrinkle black powder coat.
2009 XR120017590-08 N/A 17585-08
Notes:Silver powder coated set.
2010-2016 883C, 883L,
1200N, 1200X
17532-07A17579-07A N/A 17501-0417581-04
Notes:Polished set.
2010-2016 1200C, 1200L,
1200CP, 1200V, 1200T
17537-07A17579-07A N/A 17551-04
Notes:Chrome set.
2010-2014 883R, 883N,
1200CP, 1200CA, 1200CB
17614-07A N/A 17655-0517581-04
Notes:Silver powder coated bottom, black powder coated top.
2010 XR120017590-08A N/A 17585-08
Notes:Silver powder coated set.
2010-2013 XR1200X17591-10 N/A 17615-10
Notes:Black set.
2015-2016 883R, 883NN,
1200CP, 1200CA, 1200CB
17598-07A N/A 17655-05
Notes:Silver powder coated bottom, black powder coated top.

Rocker Box Gaskets


Top cover gaskets

91-0317353-89CRocker cover gasket (includes cutouts for the breather to fit into). Gasket 17353-89B also usable.
No breather seal required.
04-0617353-89CRocker cover gasket (includes cutouts for the breather to fit into). Only use -89C gasket.
No breather seal required. See TT#253.
07-1617362-07Rocker cover gasket (does not include cutouts for the breather to fit into).
17393-07 breather seal (required with rocker cover gasket 17362-07)

Pushrods

Pushrod lean angle on 91-up engines. The lifters are square to the lifter bore but they're not quite square to the rocker arm slot for the pushrod.
There is a slight lean angle between the lifters and the rocker arms as shown below.
The pushrod tubes line up square with the lifter blocks and hide the lean angle of the pushrods.
In the pics below, a inside bore gauge is lined up app. straight from the lifter bore to the rocker arm slot for the pushrod.
This is the app. lean angle of the pushrods between the lifter and the rocker arm.
The pushrod angle also changes as the rocker arm moves thru it's arc while the valve is opened and closed. 1)

2) 3)



2) , 3)
photo by Hippysmack
This website uses cookies for visitor traffic analysis. By using the website, you agree with storing the cookies on your computer.More information