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.
If you were to completely assemble an Evo motor and left it without firing it up, could you reuse the gaskets if you needed to pull it down and reassemble it?
I suggested that maybe you could reuse the gaskets on the rockers but not the head gaskets, but I never have. I've always thought if you torqued the heads then you tossed them no matter what.
Thoughts.
Never had any such issues, even with 11.25:1 compression..
On Head Gaskets??? never.. Not Me thanks
at anything around 15:1+ we didn't use any Head Gasket!!
at 10:1 or so (I like to use Pump gas) Dry Head Gasket on Dead Flat surfaces!!
Last edited by Racepres; Aug 28, 2025 at 11:02 AM.
On Head Gaskets??? never.. Not Me thanks
at anything around 15:1+ we didn't use any Head Gasket!!
at 10:1 or so (I like to use Pump gas) Dry Head Gasket on Dead Flat surfaces!!
On my shovels I’ve used copper coat both sides.. sometimes 103’s with close to 13:1… 6,000+ shifts, never blown one. I’ve never ran more than 13:1 or larger than 3 13/16 cylinders.. never ran O ring.. so my shared experience has limits. And this is with copper gaskets and extremely limited hot spots due to compulsive **** clearancing the fire ring to be about half a thousandths all the way around when torqued with crushed gasket.
Evo’s.. I’m still learning. Still kinda new to me. Only 5 total builds under my belt and a half dozen stock motors for maintenance. So can’t offer tried advice maintaining big EVO engines other than so far I havn’t had any issues with the stock Ultima supplied gaskets.
Last edited by Rains2much; Aug 28, 2025 at 11:16 AM.
I've run solid copper gaskets with copper coat on both sides on my stroker shovel. Never considered this for an Evo motor though as the bolt up and stretch of the Evo cylinders kinda makes it harder to run. My opinion only of course.
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.