TECH
Triumph bore size "cheat sheets"... for 500, 650, 750 twins
How to figure out what oversize pistons you need for your 500, 650, or 750 Triumph twin... these "cheat sheets" (size charts) will help. You can also print or download them for future reference.
Hepolite piston ring installation notes
Made in England, Hepolite piston rings are the highest quality rings currently produced for your vintage Triumph. This ring set includes a modern two piece oil control ring with a coil spring. Read our installation notes to learn more...
Triumph twin crankshaft journal sizes
Measuring your Triumph crankshaft journals? Here are dimensions for the most popular vintage 500, 650, and 750 twin crankshafts.
Triumph motorcycle engine and frame numbers
WHAT YEAR IS IT?
Here is a guide to vintage Triumph motorcycle frame and engine numbers and how to identify what you have. From pre war to the close of the factory, you can find out what year your engine and frame were made with these charts...
Hastings Triumph piston ring installation notes
This USA made piston ring set is suitable for OEM A/E Hepolite Triumph 650 pistons, and area perfect compliment to the JCC 650 pistons currently available. Please read the following to insure proper seating of your new rings.