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techtalk:evo:engmech01g [2022/04/01 21:25] – [1986-1990 Cam Cover] hippysmacktechtalk:evo:engmech01g [2022/04/04 14:17] (current) – [2004-E2007 Covers] hippysmack
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 |{{:techtalk:ih:engmech:1985_xl-xls_cam_cover_25208-84a_by_nitrofrankie_go-fast_hd_pic4.jpg?direct&300|}}|{{:techtalk:evo:engmech:1986-1990_sportster_cam_cover_25219-86_by_deadpartsmc_pic5.jpg?direct&300|}}|{{:techtalk:evo:engmech:1986-1990_sportster_cam_cover_date_codes.jpg?direct&300|}}| |{{:techtalk:ih:engmech:1985_xl-xls_cam_cover_25208-84a_by_nitrofrankie_go-fast_hd_pic4.jpg?direct&300|}}|{{:techtalk:evo:engmech:1986-1990_sportster_cam_cover_25219-86_by_deadpartsmc_pic5.jpg?direct&300|}}|{{:techtalk:evo:engmech:1986-1990_sportster_cam_cover_date_codes.jpg?direct&300|}}|
  
 +===== Machining Dates (2004-up) =====
 +2004-up cam covers have a several numbers pin stamped on the inside of the cover. \\
 +Original location was on the rear near the oil tank breather fitting. \\
 +Later covers were stamped on the inside front in the round portion behind the oil filter mount. \\
 +There are 2 sets of numbers with the first being the month, day and year of machining (holes drilled, bushings installed/reamed etc.) \\
 +The next set of numbers are for unknown reasons at this time. \\
 +The unknown numbers may be production, control or operator numbers and possibly a mix of the same. \\
  
 +2004-2006 covers also have a circled date stamp that was faded out for model season 2007. \\
 +As per usual, the remainder of 2006 covers were used out in the early part of the 2007 season (running change). \\
 +So 2004-2006 and some 2007 covers will have both machining dates and casting dates. \\ 
 ====== 1986-1990 Cam Covers ====== ====== 1986-1990 Cam Covers ======
 The same HD part number (25219-86) was used for 1986-1990 cam covers. \\ The same HD part number (25219-86) was used for 1986-1990 cam covers. \\
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 ====== 2004-Up Cam Covers ====== ====== 2004-Up Cam Covers ======
 +There are only 4 cam cover part number changes on 2004-2016 Sportsters, and most likely beyond and not counting XR models. \\
 +They are the same cover with different finishes: polished, chrome, black or gray. \\
 +The XR cover is a completely different design. \\ 
 +Figuring that there was a casting/design change in 2007, that leaves a total of 2 versions of these covers not counting surface finish or XRs. \\
 + 
 +**2007 Casting number change**: \\
 +The same casting design (25230-04) was used from 2004 through an early 2007 running design change to casting# (25230-04A). \\
 +The casting number change has a direct correlation to the removal of casting bumps in the feed galley of the cover. \\
 +Casting# (25230-04) has the casting bumps in the feed galley. Casting# (25230-04A) does not have the casting bumps in the feed galley. \\
 +In 2007, the MoCo made a drastic change to the gerotor sizes in the oil pump. Both feed and scavenge gerotor sets got much taller than before. \\
 +As a result, the scavenge volume increased and according to measurements, the feed side volume was slightly reduced compared to 2006-earlier design. \\
 +With 2007 oil pumps having slightly less feed volume, it's possible the removal of casting bumps in the cover were to free up oil flow. \\
 +[[techtalk:evo:oil03g|Click Here]] to read more on the Volume and Flow Comparison between 2006 and 2007 oil pumps in the Sportsterpedia. \\
 +
 +|  E2007 Cam Cover (casting# 25230-04) ((photo courtesy of DeadpartsMC, [[https://www.ebay.com/str/deadpartsmc|Link to Ebay Store]] ))  |
 +|{{:techtalk:evo:engmech:2007e_sportster_cam_cover-_inside_by_deadpartsmc.jpg?direct&300|}}|
 +
 +===== 2004-E2007 Covers =====
 +
 +===== L2007-Up Covers =====
  
  

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