Street Motorcycles and Parts Discussion, Questions and answers that pertain to street motorcycles and parts can be found in this forum.

High Compression Heads

Old 02-04-2004, 03:47 PM
New To BikerForums
Thread Starter
Join Date: Feb 2004
Posts: 1
Default High Compression Heads

I have been riding my '99 XL1200C (Sportster Custom) for 5 years now. My rocker box gaskets are leaking so I'm going to replace them this spring. Since I will have the rocker boxes off and I will be halfway to a head replacement, I'm considering changing to the Sceaming Eagle High Compression heads. I'm looking for advice and feedback on how this will effect my performance.

I am a torque junky. I can't get enough. I ride moderately. I frequently run the bike up to 4,000 RPM with strong acceleration. I occasionally crack it hard and take it up to 5,200 or so. I like to have the juice when I ask for it, but I most often want it at 2,000 - 5,000 RPM.

Does anyone have experience with compression?


Mike S.
Mike S XL1200C is offline  
Old 02-04-2004, 09:26 PM
Join Date: Aug 2003
Posts: 132

Nallin sttage two ported heads are good I run ported buell thunderbolt. You have to run high compression pistons to get high compression. I like weisco 10:1 or buell pistons I wouldnt run 10:5 due to detination problems Then you can run a screamin eagle ingition modoule to raise the rev limit. I wold go back with a copper head gasket to add a touch more compression.
fatster is offline  
Related Topics
Thread Starter
Last Post
Parts For Sale
12-09-2012 04:04 PM
Street Motorcycles and Parts
10-26-2006 07:46 AM
Introduce Yourself
05-01-2005 02:20 PM
Street Motorcycles and Parts
05-06-2003 06:30 PM
Street Motorcycles and Parts
05-06-2003 10:06 AM

Thread Tools
Search this Thread
Quick Reply: High Compression Heads

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.