BCS Plunger Sections
Lower and lengthen your Triumph
while still retaining a few inches of suspension travel, using a BCS plunger
section or plunger frame.
These are very similar to those used by BSA and Indian in the good old days, and to the custom "Santee Softail" or "Amen Saviour" of the '70s. Axle carriers and springs are chrome plated, and require the use of the 37-2089 axle adjusters used on virtually all pre-oil frame Triumph rear wheels. These plungers are designed to be used with the pre-oil frame Triumph rear wheel setup, but we have seen conical hub rear wheels used with a bit of work.
Click Here to see a Bolton Plunger Section (544-5517) on a bike.
Don't forget: with any of our custom rear frame sections you will need a custom oiltank, fender mounts, and and extended brakerod, chainguard, and chain, all generally available through BCS.
Note: Please bear in mind that all tail sections and frames we sell for British bikes are manufactured with some offset to reflect the run of the rear chain, and thus are not intended to be symmetric. In addition, due to slight warpage caused by cooling after manufacture, long storage, and shipping, it is not unheard of for frames or tail sections to require some slight alignment during assembly of the motorcycle. As all of these items are made of mild steel which is quite malleable, this should not be much trouble to affect, and does not indicate a faulty frame or tail section, just normal manufacturing tolerances for this type of product.
Pictured Above, 544-5517 Plunger Section, Bolton, 63-70 Triumph
Pictured Above, 544-5519 Plunger Section, Bolton, Unit Triumph 500