Contact Us

   We have a full service machine shop to help you with your needs big or small. We look forward to helping make that much needed progress on you project or that repair to get you back on the road. 

 

 

 

 

4 Kenwood Street
Asheville, NC, 28806
United States

828-552-4707

Deep Six Cycles is a small grass roots chopper shop specializing in the manufacture and modification of motorcycles and motorcycle parts. All of our products are made right here in the U.S.A.

Dual Plug Head Service

Machine Shop Services

Please Visit Our "Services" Section for more information about our machining services!

Dual Plug Head Service

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Dual Plug Head Service

250.00

  Shovelhead and Ironhead Harleys benefit greatly from adding an additional spark plug. Due to the necessity of a rather huge dome piston due to the hemi head design and the placement of a single spark plug all the way off to one side.  The dome of the piston tends to obscure the flame front. That makes for very inefficient combustion.  

  With dual spark plugs your motor will be more resistant to spark knock, start easier and will pick up a little power as well. It is very hard to deny the benefit of adding an extra spark plug to these hemi heads. 

  The rocker boxes will need to be split or notched like the ones in the photo to clear the new plug and wire. We can notch your boxes for an additional $40.

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