Harley-Davidson Dual 10mm Spark Plug Head

The right way to convert a cylinder heads to twin plug!
The jig that is generally available to Harley-Davidson workshops and tuners, used to convert Harley-Davidson heads to a twin spark plug set up does not provide the best solution. Whilst this promises a performance increase, the end result is not the best regarding plug position in relation to the flame …

Setting up your Head Properly: Carburetion

After having your head re-worked to high quality, close tolerances, setting up your head requires expert help re-jetting the carbs. This will add to its performance, clean running, emissions level and longevity. Injection systems also require re-calibration, but this is not quite as critical.

We recommend that you use a rolling road with gas analysis equipment. In general, you will need …

Expert Vapour Blasting

The Cylinder Head Shop offers a top quality vapour/aqua bead blasting service using market leading abrasive developments. These produce a better than new, concours finish, to aluminium components.
IMPORTANT NOTE: THIS SERVICE IS NOW SUB CONTRACTED OUT….
We use a Komet cabinet unit but that is not where the magic lies. Having had more than 25 years in the business, we have …

Rolling Roads in the UK

Carb Settings and rolling roads, how to set your head up properly.
After having your head re-worked to high quality, close tolerances, setting up your head requires expert help re-jetting the carbs. This will add to its performance, clean running, emissions level and longevity. Injection systems also require re-calibration, but this is not quite as critical.

We recommend that you use a …