Tuning for Speed

Philip Edward Irving OBE, C.Eng., M.I.Mech.E., M.S.A.E., (1903–1992) was an Australian engineer and author, most famous for the classic engine performance guide, ‘Tuning for Speed’.
Tuning for Speed should be on the top 10 list of just about everyone’s motorcycle classic book list and has been called “one of the best books ever written on the improvement of motorcycle engines”. …

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 …

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 …

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 …