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Engine Mechanical TopicsDiscussion for motor builds, cams, head work, stripped bolts and other engine related issues. The good and the bad. If it goes round and around or up and down, post it here.
5/16 (99-04) & 7mm (05-up) valves,beehive springs on the 7mm valves.raised int ports on `06 up.raised int with larger ex ports on `07 up.bolt patterns are the same on both
Would replacing the cylinder heads (Stock OEM Harley Davidson) on a 2005 FXD/I, with a later model cylinder head (06'-up) make a difference in performance?
What is the difference between the TC88 and TC96 cylinder heads (Ex:bolt pattern, valve, ect)?
If looking for more bolt-on power, the 96" head is not going to be a game-changer.
Once ported, both early and late will produce just about the same.
Scott
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.
Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.
Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.
