Table of Contents
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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) |
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Year Model | Lower Box Part# | Lower Box Casting# | Middle Spacer Part# | Middle Spacer Casting# | Upper Cover Part# | Upper Cover Casting# |
1986-1988 All | 17532-86 *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. |
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1989 All | 17532-86A | 17554-86A | 17533-86A | 17555-86A | 17501-86A | 17556-86A |
Notes: | On L89 lower boxes, Click Here to view TSB M-984 regarding sealing area around middle spacer. | |||||
1990 All | 17532-86A | 17554-86A | 17533-86B | 17580-95 | 17501-86A | 17556-86A |
Notes: | Polished set. | |||||
1991 All | 17532-86A *17532-86E | 17554-86A | 17533-89 *17533-90A | 17501-86A *17501-86B | 17556-86A | |
Notes: | ||||||
1992-1994 All | 17532-86A *17532-86E | 17554-86A | 17533-90 *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 | 17579-95 | 17533-90A | 17580-95 | 17501-86B | 17581-95 |
Notes: | Polished set. | |||||
1996-2003 1200C | 17537-96 *17537-96C | 17579-95 *17579-95C | 17538-96 | 17580-95 | 17551-96 | 17581-95 |
Notes: | Chrome set. | |||||
1998-2003 1200S | 17614-98 *17614-98C | 17579-95 *17579-95C | 17533-90A | 17580-95 | 17527-98 | 17581-95 |
Notes: | Silver powder coated set. | |||||
2002-2003 883R | 17532-86B *17532-86E | 17579-95 | 17535-02 | 17501-86B | ||
Notes: | Polished set. | |||||
2004-2006 883, 883C, 883L | 17532-86C *17532-86E | 17579-95B | N/A | 17501-04 | 17581-04 | |
Notes: | Polished set. | |||||
2004-2006 1200C | 17537-96A *17537-96C | 17579-95B *17579-95C | N/A | 17551-04 | 17581-04 | |
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. |
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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 883R | 17614-98A *17614-98B *17614-98C | 17579-95A *17579-95B 17579-95C | N/A | 17655-05 | ||
Notes: | Silver powder coated bottom, black powder coated top. | |||||
2006 1200R | 17645-06 *17645-06A | N/A | 17655-05 | |||
Notes: | Black powder coated set. | |||||
2007-2009 883, 883C, 883L, 1200N | 17532-07 | 17579-07 | N/A | 17501-04 | 17581-04 | |
Notes: | Polished set. | |||||
2007-2009 1200C, 1200L, XL50 | 17537-07 | 17579-07 | N/A | 17551-04 | ||
Notes: | Chrome set. | |||||
2007-2009 883R, 883N | 17614-07 | 17579-07 | N/A | 17655-05 | ||
Notes: | Silver powder coated bottom, black powder coated top. | |||||
2007-2009 1200R | 17645-07 *17645-07A | N/A | 17655-05 | |||
Notes: | Black powder coated set. -07A is wrinkle black powder coat. | |||||
2009 XR1200 | 17590-08 | N/A | 17585-08 | |||
Notes: | Silver powder coated set. | |||||
2010-2016 883C, 883L, 1200N, 1200X | 17532-07A | 17579-07A | N/A | 17501-04 | 17581-04 | |
Notes: | Polished set. | |||||
2010-2016 1200C, 1200L, 1200CP, 1200V, 1200T | 17537-07A | 17579-07A | N/A | 17551-04 | ||
Notes: | Chrome set. | |||||
2010-2014 883R, 883N, 1200CP, 1200CA, 1200CB | 17614-07A | N/A | 17655-05 | 17581-04 | ||
Notes: | Silver powder coated bottom, black powder coated top. | |||||
2010 XR1200 | 17590-08A | N/A | 17585-08 | |||
Notes: | Silver powder coated set. | |||||
2010-2013 XR1200X | 17591-10 | 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
91-03 | 17353-89C | Rocker cover gasket (includes cutouts for the breather to fit into). Gasket 17353-89B also usable. No breather seal required. |
04-06 | 17353-89C | Rocker cover gasket (includes cutouts for the breather to fit into). Only use -89C gasket. No breather seal required. See TT#253. |
07-16 | 17362-07 | Rocker 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)
1)
Tomcatt of the XLFORUM http://xlforum.net/forums/showthread.php?t=2074861&page=3