When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
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.
Was doing some maintenance as part of a 1,000 mile break-in on a new build and decided to borescope the cylinders and saw scoring. i've seen scoring before from wrist pin, debris, and overheated pistons but not scoring like this. any ideas what this came from? i changed oil on the new build at 50 miles, 200 miles, 500 miles, and am about to drop the oil for the 1k mile services. during break in the engine never got super hot and it wasn't flogged. i followed the S&S break in recommended method. the plug on the front cylinder was a little white, rear was coffee and cream color.
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.
Cylinder scoring
