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 …

Nucleus Sport Elite Valves & Guides for Harleys

The Cylinder Head Shop introduces the Most Radical Valves Ever Designed for Harley-Davidsons.
The Nucleus Sports Elite FDS valves are made to the same exacting standards as all the others in our range and of the same high quality materials.
Note the special FDS Flame Deflector Stem on the exhaust valve. Although no heavier than a standard valve, in fact it …

Nucleus Power Guides

CHS Nucleus Power Guides to Compliment our Range of Valves Power Guides in Colsibro
For 15 years, The Cylinder head Shop has been on the leading edge of cylinder head technology – leading the field in the application of racing materials and specifications to road and classic racer cylinder heads. We have questioned many of the “pre-sets” that govern current thinking …

Nucleus Sports Elite Valves and Guides

About 75% of the power in your engine comes from the cylinder head. In money terms, you get more B.H.P. from developing your head than any other other part of your machine. In other words, if you are looking for more performance cheaply, your head is the place to spend it on. You’ll get the best return.
Astonishingly, most head parts …