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
Below is a list of factory gaskets used on Sportster rocker boxes.
Original part numbers are listed first with known superseded part numbers below the original ones.
Pics of the different part numbers are listed to the right in the chart. Click on the link to open a picture of the part.
While a complete updated list is difficult to maintain, this list may help find updated as well as NOS gaskets.
Check the notes section for particulars as gaskets have changed over the years.
Sportster Rocker Box Gaskets | ||||
Year Model | Position | Part# | Notes | Pics |
1986-1990 | Upper (cover gasket) | 17354-86 17354-86A | -86 - cork gaskets replaced in 1989 by -86A. -86A - rubber gaskets. | -86 1) -86A 2) |
Lower (middle section) | 17353-86 17353-86A | -86 - cork gaskets replaced in 1989 by -86A. -86A - rubber gaskets. | -86 3) -86A 4) |
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Inner (bottom section) | 17358-84 17358-84A | Small rectangle gasket on top of bottom section. -84 - cork gaskets replaced in 1989 by -84A. -84A - rubber gaskets. | -84 5) | |
Head (bottom section) | (L) 16779-84A (R) 16778-84 | Beaded gaskets between lower section and heads. | -84 6) |
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Cover screw washer | 6114 63858-49 | Washer seals against air intake or exhaust. 6114 - reusable copper washer replaced by fiber (1987) -49 - Fiber washer, reusable unless breaks or erodes. | 6114 7) -49 8) |
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1991-2003 | Upper (cover gasket) | 17354-89 | -89 9) | |
Lower (middle section) | 17353-89 17353-89C | -89C superseded original gasket. Also used on 04-06 models. | -89 10) -89C 11) |
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Inner (bottom section) | 17358-84A | Small rectangle gasket on top of bottom section. | ||
Head (bottom section) | (L) 16779-84A, (R) 16778-84A | Gasket between lower box and heads. | ||
Cover screw washer | 63858-49 | Fiber washer seals against air intake. Reusable unless breaks or erodes. Copper washer (6114) Ok to use as well. | -49 12) | |
Umbrella valve | 26856-89 | Not a gasket but rather a breather valve. Good maintenance to replace when cover is off. | ||
Full gasket kit | 17036-91 | Includes all original gaskets above. | ||
2004-2006 | Lower (cover gasket) | 17353-89A 17353-89B 17353-89C | Cover gasket (includes cutouts for breather to fit into). Only use -89C gasket. No breather seal required. See TT#253. | -89C 13) |
Inner (bottom section) | 17358-84A | Small rectangle gasket on top of bottom section. | ||
Head (bottom section) | 16800-84 | One piece gasket between lower box and head. | ||
2007-Present | Upper (cover gasket) | 17362-07 | (does not include cutouts for the breather to fit into). 17393-07 breather seal required. | -07 14) |
Breather valve seal | 17393-07 | Required to seal the breather valve into their holes in the lower rocker box section. | ||
Head (bottom section) | 16800-84A | One piece gasket between lower box and head. |
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. 15)