Lucas Type Auto Advance Unit Springs (1 PAIR) - 54415642 Wipac Gear boxes that use the

Gear boxes that use the early style "plunger" MUST use the shift plate we stock under 57-0500 / T500 and later models that use the "Leaf Spring" set-up must use the plate 57-4055 / T4055

Please review the measurements above to ensure the best fitment

OEM part number is 68-3278

You will get a total of six clutch plates as pictured

etc) from 1971 & On

Lucas Type Auto Advance Unit Springs (1 PAIR) - 54415642 Wipac Gear boxes that use theNew Lucas Type Auto Advance Spring Set. It is crucial that your auto advance springs are in good working order. In detail, if your springs become worn and loose tension, it will cause erratic idle especially when the RPM's are decreasing. This new auto advance spring set has the right tension which will allow your motorcycle to rev smoothly throughout the RPM range and smoothly at idle. Works with most Triumph, BSA, & Norton singles, twins and triples