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techtalk:evo:engmech02 [2019/08/11 18:16]
ixl2relax [Comparing OEM and Andrews Cam Grinds]
techtalk:evo:engmech02 [2019/09/23 20:14] (current)
hippysmack [Pinion Gear]
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 ====== Tappets (lifters) ====== ====== Tappets (lifters) ======
 +
 +==== 86-90 models ====
 +{{:​techtalk:​evo:​engmech:​86_engine_8_by_xtremraptor.jpg?​direct&​300|}} ((photo by xtremraptor of the XLFORUM)) {{:​techtalk:​evo:​engmech:​86_engine_4_by_xtremraptor.jpg?​direct&​300|}} ((photo by xtremraptor of the XLFORUM)) \\
 ====== Hydraulic Lifters ====== ====== Hydraulic Lifters ======
 ===== Sub-Documents ===== ===== Sub-Documents =====
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 ====== Pinion Gear ====== ====== Pinion Gear ======
  
-**Compatibility**+**Compatibility** ​\\
 ((From HD Parts Catalogs 2004 pg 17, 2005 pg 19, 2006 pg 19, 2007 pg 19, 2008 pg 19, 2009 pg 25-27, 2010 pg 25-27, 2011 pg 25-27, 2012 pg 25-27, 2013 pg 29-31, 2014 pg 17, 2015 pg 19, 2016 pg 19))  ((From HD Parts Catalogs 2004 pg 17, 2005 pg 19, 2006 pg 19, 2007 pg 19, 2008 pg 19, 2009 pg 25-27, 2010 pg 25-27, 2011 pg 25-27, 2012 pg 25-27, 2013 pg 29-31, 2014 pg 17, 2015 pg 19, 2016 pg 19)) 
-   +Frame mount Evos 1986-2003 do not list a part number for the pinion gear and it appears the pinion gear is part of the (cam gear set). \\ 
-   +The 88-99 pinion gear has a coarse tooth pitch. \\ 
-Frame mount Evos 1986-2003 do not list a part number for the pinion gear and it appears the pinion gear is part of the (cam gear set).+The 2000-up pinion gear has a fine tooth pitch. \\
  
 |Pinion Gear Part#|Year Models| |Pinion Gear Part#|Year Models|
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 XL Pinion Gear Color/Size Info here: XL Pinion Gear Color/Size Info here:
 http://​xlforum.net/​forums/​showthread.php?​t=1963918 http://​xlforum.net/​forums/​showthread.php?​t=1963918
 +
 +**Possible 91-up woodruff key failure notice**: \\
 +The woodruff key on the pinion shaft has ben subject to shearing. \\ 
 +There is a bronze oil pump gear available which is considered an upgrade but that won't stop the key from shearing. \\
 +Read more about the [[techtalk:​evo:​oil03#​oil_pump_drive_gear|oil pump drive gear failure and upgrade]] here in the Sportsterpedia. \\
 +What happens is the crank develops a little run-out (especially when the power level is raised). ((http://​xlforum.net/​forums/​showthread.php?​t=1666277 of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=1666277)) \\
 +This causes the teeth of the steel oil pump drive gear to wear badly on one side. \\
 +Generally, 180° from the worn teeth (front of tooth pitch) you'll see almost no wear at all so you have to inspect all the way around the gear (rear tooth pitch). \\
 +If you see them sharpening like the above photo, you're on borrowed time. \\
 +When one of these steel gears fails, it's really ugly and makes a mess and can damage a lot of other things as well. \\
 +The bronze gear solves the problem nicely though. It's a Buell piece that came out in 2006. \\
 +This was a much worse problem on Buells due to the higher power levels. \\
 +But at 65hp, it's not nearly so big of an issue, so HD never bothered to put them in XL's probably due to cost. \\
 +It's a good upgrade when hopping up an XL and it's cheap insurance against a catastrophic failure. \\
 +
 +It's very important to hold the crank still from this side (not the primary side) when torquing the pinion nut. \\
 +If you, for example, put the bike in gear and hold the rear brake and torque on the nut, you run the very real risk of knocking the crank out of true. \\
 +It's not designed to transmit torque from one side to the other and it tries to twist the crankpin connection. \\
 +Now, with respect to the key shearing, it's a very common issue particularly when heavy valve springs are used. \\
 +The caption describes the fix, Loctite red and 70ft-lbs instead of the factory specified 50ft-lbs. You won't have this issue again. \\
 +You'll need a tool to lock the pinion gear for removal or installation. See [[techtalk:​ref:​tools133#​and_up_models_5_speed|tool options]] in the REF section of the Sportsterpedia. \\
 +{{:​techtalk:​evo:​engmech:​pinion_nub_by_aswracing.jpg?​direct&​250|}} ((photo by http://​xlforum.net/​forums/​showthread.php?​t=1666277 of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=1666277)) \\
  
 ====== Timing Cup (Rotor) ====== ====== Timing Cup (Rotor) ======